1
|
Nicholson CC, Knapp J, Kiljanek T, Albrecht M, Chauzat MP, Costa C, De la Rúa P, Klein AM, Mänd M, Potts SG, Schweiger O, Bottero I, Cini E, de Miranda JR, Di Prisco G, Dominik C, Hodge S, Kaunath V, Knauer A, Laurent M, Martínez-López V, Medrzycki P, Pereira-Peixoto MH, Raimets R, Schwarz JM, Senapathi D, Tamburini G, Brown MJF, Stout JC, Rundlöf M. Pesticide use negatively affects bumble bees across European landscapes. Nature 2024; 628:355-358. [PMID: 38030722 PMCID: PMC11006599 DOI: 10.1038/s41586-023-06773-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Accepted: 10/21/2023] [Indexed: 12/01/2023]
Abstract
Sustainable agriculture requires balancing crop yields with the effects of pesticides on non-target organisms, such as bees and other crop pollinators. Field studies demonstrated that agricultural use of neonicotinoid insecticides can negatively affect wild bee species1,2, leading to restrictions on these compounds3. However, besides neonicotinoids, field-based evidence of the effects of landscape pesticide exposure on wild bees is lacking. Bees encounter many pesticides in agricultural landscapes4-9 and the effects of this landscape exposure on colony growth and development of any bee species remains unknown. Here we show that the many pesticides found in bumble bee-collected pollen are associated with reduced colony performance during crop bloom, especially in simplified landscapes with intensive agricultural practices. Our results from 316 Bombus terrestris colonies at 106 agricultural sites across eight European countries confirm that the regulatory system fails to sufficiently prevent pesticide-related impacts on non-target organisms, even for a eusocial pollinator species in which colony size may buffer against such impacts10,11. These findings support the need for postapproval monitoring of both pesticide exposure and effects to confirm that the regulatory process is sufficiently protective in limiting the collateral environmental damage of agricultural pesticide use.
Collapse
Affiliation(s)
| | - Jessica Knapp
- Department of Biology, Lund University, Lund, Sweden.
- School of Natural Sciences, Trinity College Dublin, Dublin, Ireland.
| | - Tomasz Kiljanek
- Department of Pharmacology and Toxicology, National Veterinary Research Institute, Puławy, Poland
| | | | - Marie-Pierre Chauzat
- Laboratory for Animal Health, ANSES, Paris-Est University, Maisons-Alfort, France
| | - Cecilia Costa
- Council for Agricultural Research and Economics-Agriculture and Environment Research Centre, Bologna, Italy
| | - Pilar De la Rúa
- Department of Zoology and Physical Anthropology, University of Murcia, Murcia, Spain
| | - Alexandra-Maria Klein
- Nature Conservation and Landscape Ecology, University of Freiburg, Freiburg, Germany
| | - Marika Mänd
- Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Tartu, Estonia
| | - Simon G Potts
- Centre for Agri-Environmental Research, School of Agriculture, Policy and Development, University of Reading, Reading, UK
| | - Oliver Schweiger
- Department of Community Ecology, Helmholtz Centre for Environmental Research-UFZ, Halle, Germany
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Leipzig, Germany
| | - Irene Bottero
- School of Natural Sciences, Trinity College Dublin, Dublin, Ireland
| | - Elena Cini
- Centre for Agri-Environmental Research, School of Agriculture, Policy and Development, University of Reading, Reading, UK
| | - Joachim R de Miranda
- Department of Ecology, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Gennaro Di Prisco
- Council for Agricultural Research and Economics-Agriculture and Environment Research Centre, Bologna, Italy
- Institute for Sustainable Plant Protection, The Italian National Research Council, Portici, Italy
| | - Christophe Dominik
- Department of Community Ecology, Helmholtz Centre for Environmental Research-UFZ, Halle, Germany
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Leipzig, Germany
| | - Simon Hodge
- School of Natural Sciences, Trinity College Dublin, Dublin, Ireland
| | - Vera Kaunath
- Department of Biology, Lund University, Lund, Sweden
| | - Anina Knauer
- Agroscope, Agroecology and Environment, Zurich, Switzerland
| | - Marion Laurent
- Unit of Honey Bee Pathology, Sophia Antipolis Laboratory, ANSES, Sophia Antipolis, France
| | | | - Piotr Medrzycki
- Council for Agricultural Research and Economics-Agriculture and Environment Research Centre, Bologna, Italy
| | | | - Risto Raimets
- Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Tartu, Estonia
| | | | - Deepa Senapathi
- Centre for Agri-Environmental Research, School of Agriculture, Policy and Development, University of Reading, Reading, UK
| | - Giovanni Tamburini
- Nature Conservation and Landscape Ecology, University of Freiburg, Freiburg, Germany
- Department of Soil, Plant and Food Sciences, University of Bari, Bari, Italy
| | - Mark J F Brown
- Department of Biological Sciences, Royal Holloway University of London, Egham, UK
| | - Jane C Stout
- School of Natural Sciences, Trinity College Dublin, Dublin, Ireland
| | - Maj Rundlöf
- Department of Biology, Lund University, Lund, Sweden.
| |
Collapse
|
2
|
Babin A, Schurr F, Delannoy S, Fach P, Huyen Ton Nu Nguyet M, Bougeard S, de Miranda JR, Rundlöf M, Wintermantel D, Albrecht M, Attridge E, Bottero I, Cini E, Costa C, De la Rúa P, Di Prisco G, Dominik C, Dzul D, Hodge S, Klein AM, Knapp J, Knauer AC, Mänd M, Martínez-López V, Medrzycki P, Pereira-Peixoto MH, Potts SG, Raimets R, Schweiger O, Senapathi D, Serrano J, Stout JC, Tamburini G, Brown MJF, Laurent M, Rivière MP, Chauzat MP, Dubois E. Distribution of infectious and parasitic agents among three sentinel bee species across European agricultural landscapes. Sci Rep 2024; 14:3524. [PMID: 38347035 PMCID: PMC10861508 DOI: 10.1038/s41598-024-53357-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Accepted: 01/31/2024] [Indexed: 02/15/2024] Open
Abstract
Infectious and parasitic agents (IPAs) and their associated diseases are major environmental stressors that jeopardize bee health, both alone and in interaction with other stressors. Their impact on pollinator communities can be assessed by studying multiple sentinel bee species. Here, we analysed the field exposure of three sentinel managed bee species (Apis mellifera, Bombus terrestris and Osmia bicornis) to 11 IPAs (six RNA viruses, two bacteria, three microsporidia). The sentinel bees were deployed at 128 sites in eight European countries adjacent to either oilseed rape fields or apple orchards during crop bloom. Adult bees of each species were sampled before their placement and after crop bloom. The IPAs were detected and quantified using a harmonised, high-throughput and semi-automatized qPCR workflow. We describe differences among bee species in IPA profiles (richness, diversity, detection frequencies, loads and their change upon field exposure, and exposure risk), with no clear patterns related to the country or focal crop. Our results suggest that the most frequent IPAs in adult bees are more appropriate for assessing the bees' IPA exposure risk. We also report positive correlations of IPA loads supporting the potential IPA transmission among sentinels, suggesting careful consideration should be taken when introducing managed pollinators in ecologically sensitive environments.
Collapse
Affiliation(s)
- Aurélie Babin
- ANSES, Sophia Antipolis Laboratory, Unit of Honey bee Pathology, 06902, Sophia Antipolis, France.
| | - Frank Schurr
- ANSES, Sophia Antipolis Laboratory, Unit of Honey bee Pathology, 06902, Sophia Antipolis, France
| | - Sabine Delannoy
- IdentyPath Genomics Platform, Food Safety Laboratory, ANSES, 94701, Maisons-Alfort, France
| | - Patrick Fach
- IdentyPath Genomics Platform, Food Safety Laboratory, ANSES, 94701, Maisons-Alfort, France
| | | | - Stéphanie Bougeard
- ANSES, Ploufragan-Plouzané-Niort Laboratory, Epidemiology and Welfare, France
| | - Joachim R de Miranda
- Department of Ecology, Swedish University of Agricultural Sciences, 75007, Uppsala, Sweden
| | - Maj Rundlöf
- Department of Biology, Lund University, Lund, Sweden
| | - Dimitry Wintermantel
- Chair of Nature Conservation and Landscape Ecology, University of Freiburg, Tennenbacher Straße 4, 79106, Freiburg, Germany
| | - Matthias Albrecht
- Agroecology and Environment, Agroscope, Reckenholzstrasse 191, 8046, Zurich, Switzerland
| | - Eleanor Attridge
- Federation of Irish Beekeepers' Associations, Tullamore, Ireland
| | - Irene Bottero
- Botany, School of Natural Sciences, Trinity College Dublin, Dublin, Ireland
| | - Elena Cini
- Centre for Agri-Environmental Research, School of Agriculture, Policy and Development, University of Reading, Reading, UK
| | - Cecilia Costa
- CREA Research Centre for Agriculture and Environment, Via di Corticella 133, 40128, Bologna, Italy
| | - Pilar De la Rúa
- Department of Zoology and Physical Anthropology, Faculty of Veterinary, University of Murcia, 30100, Murcia, Spain
| | - Gennaro Di Prisco
- CREA Research Centre for Agriculture and Environment, Via di Corticella 133, 40128, Bologna, Italy
- Institute for Sustainable Plant Protection, The Italian National Research Council, Piazzale E. Ferni 1, 80055, Portici, Napoli, Italy
| | - Christophe Dominik
- UFZ-Helmholtz Centre for Environmental Research, Department of Community Ecology, 06120, Halle, Germany
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Puschstraße 4, 04103, Leipzig, Germany
| | - Daniel Dzul
- Department of Zoology and Physical Anthropology, Faculty of Veterinary, University of Murcia, 30100, Murcia, Spain
| | - Simon Hodge
- Botany, School of Natural Sciences, Trinity College Dublin, Dublin, Ireland
- School of Agriculture and Food Science, University College Dublin, Dublin, Ireland
| | - Alexandra-Maria Klein
- Chair of Nature Conservation and Landscape Ecology, University of Freiburg, Tennenbacher Straße 4, 79106, Freiburg, Germany
| | - Jessica Knapp
- Department of Biology, Lund University, Lund, Sweden
- Botany, School of Natural Sciences, Trinity College Dublin, Dublin, Ireland
| | - Anina C Knauer
- Agroecology and Environment, Agroscope, Reckenholzstrasse 191, 8046, Zurich, Switzerland
| | - Marika Mänd
- Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Tartu, Estonia
| | - Vicente Martínez-López
- Department of Zoology and Physical Anthropology, Faculty of Veterinary, University of Murcia, 30100, Murcia, Spain
- Department of Evolution, Ecology and Behaviour, Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Crown Street, Bioscience Building, L69 7ZB, Liverpool, UK
| | - Piotr Medrzycki
- CREA Research Centre for Agriculture and Environment, Via di Corticella 133, 40128, Bologna, Italy
| | - Maria Helena Pereira-Peixoto
- Chair of Nature Conservation and Landscape Ecology, University of Freiburg, Tennenbacher Straße 4, 79106, Freiburg, Germany
| | - Simon G Potts
- Centre for Agri-Environmental Research, School of Agriculture, Policy and Development, University of Reading, Reading, UK
| | - Risto Raimets
- Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Tartu, Estonia
| | - Oliver Schweiger
- UFZ-Helmholtz Centre for Environmental Research, Department of Community Ecology, 06120, Halle, Germany
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Puschstraße 4, 04103, Leipzig, Germany
| | - Deepa Senapathi
- Centre for Agri-Environmental Research, School of Agriculture, Policy and Development, University of Reading, Reading, UK
| | - José Serrano
- Department of Zoology and Physical Anthropology, Faculty of Veterinary, University of Murcia, 30100, Murcia, Spain
| | - Jane C Stout
- Botany, School of Natural Sciences, Trinity College Dublin, Dublin, Ireland
| | - Giovanni Tamburini
- Chair of Nature Conservation and Landscape Ecology, University of Freiburg, Tennenbacher Straße 4, 79106, Freiburg, Germany
- University of Bari, Department of Soil, Plant and Food Sciences (DiSSPA-Entomology and Zoology), Bari, Italy
| | - Mark J F Brown
- Centre for Ecology, Evolution & Behaviour, Department of Biological Sciences, School of Life Sciences and the Environment, Royal Holloway University of London, Egham, UK
| | - Marion Laurent
- ANSES, Sophia Antipolis Laboratory, Unit of Honey bee Pathology, 06902, Sophia Antipolis, France
| | - Marie-Pierre Rivière
- ANSES, Sophia Antipolis Laboratory, Unit of Honey bee Pathology, 06902, Sophia Antipolis, France
| | - Marie-Pierre Chauzat
- ANSES, Sophia Antipolis Laboratory, Unit of Honey bee Pathology, 06902, Sophia Antipolis, France
- Paris-Est University, ANSES, Laboratory for Animal Health, 94701, Maisons-Alfort, France
| | - Eric Dubois
- ANSES, Sophia Antipolis Laboratory, Unit of Honey bee Pathology, 06902, Sophia Antipolis, France.
| |
Collapse
|
3
|
Linguadoca A, Jürison M, Hellström S, Straw EA, Šima P, Karise R, Costa C, Serra G, Colombo R, Paxton RJ, Mänd M, Brown MJF. Intra-specific variation in sensitivity of Bombus terrestris and Osmia bicornis to three pesticides. Sci Rep 2022; 12:17311. [PMID: 36243795 PMCID: PMC9569340 DOI: 10.1038/s41598-022-22239-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2022] [Accepted: 10/11/2022] [Indexed: 01/10/2023] Open
Abstract
There is growing evidence that pesticides may be among the causes of worldwide bee declines, which has resulted in repeated calls for their increased scrutiny in regulatory assessments. One recurring concern is that the current frameworks may be biased towards assessing risks to the honey bee. This paradigm requires extrapolating toxicity information across bee species. Most research effort has therefore focused on quantifying differences in sensitivity across species. However, our understanding of how responses to pesticides may vary within a species is still very poor. Here we take the first steps towards filling this knowledge gap by comparing acute, lethal hazards in sexes and castes of the eusocial bee Bombus terrestris and in sexes of the solitary bee Osmia bicornis after oral and contact exposure to the pesticides sulfoxaflor, Amistar (azoxystrobin) and glyphosate. We show that sensitivity towards pesticides varies significantly both within and across species. Bee weight was a meaningful predictor of pesticide susceptibility. However, weight could not fully explain the observed differences, which suggests the existence of unexplored mechanisms regulating pesticide sensitivity across bee sexes and castes. Our data show that intra-specific responses are an overlooked yet important aspect of the risk assessment of pesticides in bees.
Collapse
Affiliation(s)
- Alberto Linguadoca
- Centre for Ecology, Evolution & Behaviour, Department of Biological Sciences, School for Life Sciences and the Environment, Royal Holloway University of London, Egham, UK
- Pesticide Peer Review Unit, European Food Safety Authority (EFSA), via Carlo Magno 1A, 43126, Parma, Italy
| | - Margret Jürison
- Chair of Plant Health, Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Tartu, Estonia.
| | - Sara Hellström
- General Zoology, Institute for Biology, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany
| | - Edward A Straw
- Centre for Ecology, Evolution & Behaviour, Department of Biological Sciences, School for Life Sciences and the Environment, Royal Holloway University of London, Egham, UK
| | - Peter Šima
- Department of R&D, Koppert s.r.o., Nové Zámky, Slovakia
| | - Reet Karise
- Chair of Plant Health, Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Tartu, Estonia
| | - Cecilia Costa
- CREA Research Centre for Agriculture and Environment, via di Corticella 133, 40128, Bologna, Italy
| | - Giorgia Serra
- CREA Research Centre for Agriculture and Environment, via di Corticella 133, 40128, Bologna, Italy
| | - Roberto Colombo
- CREA Research Centre for Agriculture and Environment, via di Corticella 133, 40128, Bologna, Italy
| | - Robert J Paxton
- General Zoology, Institute for Biology, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany
| | - Marika Mänd
- Chair of Plant Health, Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Tartu, Estonia
| | - Mark J F Brown
- Centre for Ecology, Evolution & Behaviour, Department of Biological Sciences, School for Life Sciences and the Environment, Royal Holloway University of London, Egham, UK
| |
Collapse
|
4
|
Raimets R, Naudi S, Mänd M, Bartkevičs V, Smagghe G, Karise R. Translocation of Tebuconazole between Bee Matrices and Its Potential Threat on Honey Bee (Apis mellifera Linnaeus) Queens. Insects 2021; 13:insects13010045. [PMID: 35055888 PMCID: PMC8781852 DOI: 10.3390/insects13010045] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Revised: 12/02/2021] [Accepted: 12/29/2021] [Indexed: 11/26/2022]
Abstract
Simple Summary Numerous pesticide residues have been found in bee products. It is unclear whether and to what degree pesticides migrate between different bee matrices. Even though the use of many common insecticides is strictly regulated, fungicide residues are still ubiquitous in bee matrices and data regarding this problem are still insufficient. The aim of this work was to determine the migration of fungicide tebuconazole between bee matrices and to assess its potential risk to honey bee queens. We found that tebuconazole mixed into wax has the potential to migrate into royal jelly (RJ), but no residues were found in honey bee queen larvae and newly emerged queens. The residues of tebuconazole found in queen cell cups and RJ decreased over time and probably posed no direct lethal threat to queens. Nevertheless, sub-lethal effects of tebuconazole on honey bee queens might occur even at low concentrations. Abstract Various pesticide residues can be found in different bee colony components. The queen larvae of honey bee (Apis mellifera L.) receive non-contaminated food from nurse bees. However, there is little knowledge about how pesticide residues affect developing bees. Additionally, little is known about the migration of lipophilic pesticides between bee matrices. While wax, royal jelly (RJ), and bee larvae are chemically distinct, they all contain lipids and we expected the lipophilic fungicide tebuconazole to be absorbed by different contacting materials. Our aim was to analyze the translocation of tebuconazole residues from queen cell wax to RJ, queen larvae, and newly emerged queens and to evaluate its potential risk to queens. We demonstrated the potential for the migration of tebuconazole from wax to RJ, with a strong dilution effect from the original contamination source. No residues were detected in queen bee larvae and newly emerged queens, indicating that the migration of tebuconazole probably did not directly endanger the queen bee, but there was some risk that tebuconazole might still affect the homeostasis of developing bees.
Collapse
Affiliation(s)
- Risto Raimets
- Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, F. R. Kreutzwaldi 1, 51006 Tartu, Estonia; (S.N.); (M.M.); (R.K.)
- Correspondence: or ; Tel.: +372-58453095
| | - Sigmar Naudi
- Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, F. R. Kreutzwaldi 1, 51006 Tartu, Estonia; (S.N.); (M.M.); (R.K.)
| | - Marika Mänd
- Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, F. R. Kreutzwaldi 1, 51006 Tartu, Estonia; (S.N.); (M.M.); (R.K.)
| | - Vadims Bartkevičs
- Institute of Food Safety, Animal Health and Environment “BIOR”, Lejupes Street 3, LV-1076 Riga, Latvia;
| | - Guy Smagghe
- Department of Plants and Crops, Ghent University, B-9000 Ghent, Belgium;
| | - Reet Karise
- Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, F. R. Kreutzwaldi 1, 51006 Tartu, Estonia; (S.N.); (M.M.); (R.K.)
| |
Collapse
|
5
|
Vanderplanck M, Michez D, Albrecht M, Attridge E, Babin A, Bottero I, Breeze T, Brown M, Chauzat MP, Cini E, Costa C, De la Rua P, de Miranda J, Di Prisco G, Dominik C, Dzul D, Fiordaliso W, Gennaux S, Ghisbain G, Hodge S, Klein AM, Knapp J, Knauer A, Laurent M, Lefebvre V, Mänd M, Martinet B, Martinez-Lopez V, Medrzycki P, Pereira Peixoto MH, Potts S, Przybyla K, Raimets R, Rundlöf M, Schweiger O, Senapathi D, Serrano J, Stout J, Straw E, Tamburini G, Toktas Y, Gérard M. Monitoring bee health in European agro-ecosystems using wing morphology and fat bodies. OE 2021. [DOI: 10.3897/oneeco.6.e63653] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Current global change substantially threatens pollinators, which directly impacts the pollination services underpinning the stability, structure and functioning of ecosystems. Amongst these threats, many synergistic drivers, such as habitat destruction and fragmentation, increasing use of agrochemicals, decreasing resource diversity, as well as climate change, are known to affect wild and managed bees. Therefore, reliable indicators for pollinator sensitivity to such threats are needed. Biological traits, such as phenotype (e.g. shape, size and asymmetry) and storage reserves (e.g. fat body size), are important pollinator traits linked to reproductive success, immunity, resilience and foraging efficiency and, therefore, could serve as valuable markers of bee health and pollination service potential.
This data paper contains an extensive dataset of wing morphology and fat body content for the European honeybee (Apis mellifera) and the buff-tailed bumblebee (Bombus terrestris) sampled at 128 sites across eight European countries in landscape gradients dominated by two major bee-pollinated crops (apple and oilseed rape), before and after focal crop bloom and potential pesticide exposure. The dataset also includes environmental metrics of each sampling site, namely landscape structure and pesticide use. The data offer the opportunity to test whether variation in the phenotype and fat bodies of bees is structured by environmental factors and drivers of global change. Overall, the dataset provides valuable information to identify which environmental threats predominantly contribute to the modification of these traits.
Collapse
|
6
|
Najdabbasi N, Mirmajlessi SM, Dewitte K, Ameye M, Mänd M, Audenaert K, Landschoot S, Haesaert G. Green Leaf Volatile Confers Management of Late Blight Disease: A Green Vaccination in Potato. J Fungi (Basel) 2021; 7:jof7040312. [PMID: 33919547 PMCID: PMC8072593 DOI: 10.3390/jof7040312] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Revised: 04/15/2021] [Accepted: 04/16/2021] [Indexed: 11/16/2022] Open
Abstract
Yield losses of crops due to plant pathogens are a major threat in all agricultural systems. In view of environmental issues and legislative limitations for chemical crop protection products, the need to design new environmentally friendly disease management strategies has gained interest. Despite the unique capability of green leaf volatiles (GLVs) to suppress a broad spectrum of plant pathogens, their capacity to control the potato late-blight-causing agent Phytophthora infestans has not been well studied. This study addresses the potential role of the GLV Z-3-hexenyl acetate (Z-3-HAC) in decreasing the severity of late blight and the underlying gene-based evidence leading to this effect. Nine-week-old potato plants (Solanum tuberosum L.) were exposed to Z-3-HAC before they were inoculated with P. infestans genotypes at different time points. These pre-exposed potato plants exhibited slower disease development after infection with the highly pathogenic genotype of P. infestans (EU-13-A2) over time. Qualitative assessment showed that the exposed, infected plants possessed significantly lower sporulation intensity and disease severity compared to the control plants. Hypersensitive response (HR)-like symptoms were observed on the treated leaves when inoculated with different pathogen genotypes. No HR-like lesions were detected on the untreated leaves after infection. It was shown that the transcript levels of several defense-related genes, especially those that are involved in reactive oxygen species (ROS) production pathways were significantly expressed in plants at 48 and 72 h postexposure to the Z-3-HAC. The current work provides evidence on the role of Z-3-HAC in the increased protection of potato plants against late blight through plant immunity and offers new opportunities for the sustainable control of potato diseases.
Collapse
Affiliation(s)
- Neda Najdabbasi
- Department of Plants and Crops, Valentin Vaerwyckweg 1, Faculty of Bioscience Engineering, Ghent University, 9000 Ghent, Belgium; (S.M.M.); (K.D.); (M.A.); (K.A.); (S.L.); (G.H.)
- Institute of Agricultural and Environmental Sciences, Department of Plant Health, Estonian University of Life Sciences, Kreutzwaldi 5, 51014 Tartu, Estonia;
- Correspondence:
| | - Seyed Mahyar Mirmajlessi
- Department of Plants and Crops, Valentin Vaerwyckweg 1, Faculty of Bioscience Engineering, Ghent University, 9000 Ghent, Belgium; (S.M.M.); (K.D.); (M.A.); (K.A.); (S.L.); (G.H.)
| | - Kevin Dewitte
- Department of Plants and Crops, Valentin Vaerwyckweg 1, Faculty of Bioscience Engineering, Ghent University, 9000 Ghent, Belgium; (S.M.M.); (K.D.); (M.A.); (K.A.); (S.L.); (G.H.)
| | - Maarten Ameye
- Department of Plants and Crops, Valentin Vaerwyckweg 1, Faculty of Bioscience Engineering, Ghent University, 9000 Ghent, Belgium; (S.M.M.); (K.D.); (M.A.); (K.A.); (S.L.); (G.H.)
| | - Marika Mänd
- Institute of Agricultural and Environmental Sciences, Department of Plant Health, Estonian University of Life Sciences, Kreutzwaldi 5, 51014 Tartu, Estonia;
| | - Kris Audenaert
- Department of Plants and Crops, Valentin Vaerwyckweg 1, Faculty of Bioscience Engineering, Ghent University, 9000 Ghent, Belgium; (S.M.M.); (K.D.); (M.A.); (K.A.); (S.L.); (G.H.)
| | - Sofie Landschoot
- Department of Plants and Crops, Valentin Vaerwyckweg 1, Faculty of Bioscience Engineering, Ghent University, 9000 Ghent, Belgium; (S.M.M.); (K.D.); (M.A.); (K.A.); (S.L.); (G.H.)
| | - Geert Haesaert
- Department of Plants and Crops, Valentin Vaerwyckweg 1, Faculty of Bioscience Engineering, Ghent University, 9000 Ghent, Belgium; (S.M.M.); (K.D.); (M.A.); (K.A.); (S.L.); (G.H.)
| |
Collapse
|
7
|
Merivee E, Must A, Nurme K, Di Giulio A, Muzzi M, Williams I, Mänd M. Neural Code for Ambient Heat Detection in Elaterid Beetles. Front Behav Neurosci 2020; 14:1. [PMID: 32116586 PMCID: PMC7016213 DOI: 10.3389/fnbeh.2020.00001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Accepted: 01/03/2020] [Indexed: 11/13/2022] Open
Abstract
Environmental thermal conditions play a major role at all levels of biological organization; however, there is little information on noxious high temperature sensation crucial in behavioral thermoregulation and survival of small ectothermic animals such as insects. So far, a capability to unambiguously encode heat has been demonstrated only for the sensory triad of the spike bursting thermo- and two bimodal hygro-thermoreceptor neurons located in the antennal dome-shaped sensilla (DSS) in a carabid beetle. We used extracellular single sensillum recording in the range of 20-45°C to demonstrate that a similar sensory triad in the elaterid Agriotes obscurus also produces high temperature-induced bursty spike trains. Several parameters of the bursts are temperature dependent, allowing the neurons in a certain order to encode different, but partly overlapping ranges of heat up to lethal levels in a graded manner. ISI in a burst is the most useful parameter out of six. Our findings consider spike bursting as a general, fundamental quality of the classical sensory triad of antennal thermo- and hygro-thermoreceptor neurons widespread in many insect groups, being a flexible and reliable mode of coding unfavorably high temperatures. The possible involvement of spike bursting in behavioral thermoregulation of the beetles is discussed. By contrast, the mean firing rate of the neurons in regular and bursty spike trains combined does not carry useful thermal information at the high end of noxious heat.
Collapse
Affiliation(s)
- Enno Merivee
- Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Tartu, Estonia
| | - Anne Must
- Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Tartu, Estonia
| | - Karin Nurme
- Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Tartu, Estonia
| | | | - Maurizio Muzzi
- Department of Science, University of Roma Tre, Rome, Italy
| | - Ingrid Williams
- Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Tartu, Estonia
| | - Marika Mänd
- Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Tartu, Estonia
| |
Collapse
|
8
|
Hiiesaar K, Williams IH, Jõgar K, Karise R, Ploomi A, Metspalu L, Mänd M. Potential of Colorado Potato Beetle (Coleoptera: Chrysomelidae) to Adapt to Alternative Host Plants. Environ Entomol 2020; 49:151-158. [PMID: 31821413 DOI: 10.1093/ee/nvz149] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Indexed: 06/10/2023]
Abstract
Twelve selected cultivated or wild solanaceae (Solanum dulcamara, Solanum nigrum, Solanum villosum, Solanum lycopersicum, Solanum muricatum, Solanum melongena, Datura innoxia, Datura metel, Physalis spp., Capsicum annuum, Nicotiana alata, and Petunia spp.) (all species Solanales: Solanaceae) were tested as potential alternative host plants against Solanum tuberosum for a local population of the Colorado potato beetle Leptinotarsa decemlineata Say (CPB) in Estonia. Some CPB populations in America and southern Europe accept most of these plants. However, geographically isolated populations of beetles can differ in their acceptance of new host plants. Migrants from the southern Europe supplement Estonian beetle population regularly, so individuals may differ in their host plant preferences. S. melongena and S. dulcamara were well accepted by the beetles, Lycopersicum spp. (Solanales: Solanaceae) and N. alata were intermediate, and S. villosum and S. nigrum were least accepted. The beetles rejected S. muricatum, Physalis spp., C. annuum, Petunia spp., and D. metel. First-instar larvae completed a full life cycle only on S. dulcamara, N. alata, S. lycopesicum, S. melongena, although their development rate was slower, mortality was higher and emerging adults were underweight relative to those that fed on S. tuberosum. The fourth-instar larvae were less sensitive in relation to food. We found that S. dulcamara as a native plant could provide resources for CPB during early and late season. At the same time, the cultivated S. melongena would be suitable plant species for further testing as dead-end crop for integrated pest management.
Collapse
Affiliation(s)
- Külli Hiiesaar
- Chair of Plant Health, Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Tartu, Estonia
| | - Ingrid H Williams
- Chair of Plant Health, Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Tartu, Estonia
| | - Katrin Jõgar
- Chair of Plant Health, Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Tartu, Estonia
| | - Reet Karise
- Chair of Plant Health, Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Tartu, Estonia
| | - Angela Ploomi
- Chair of Plant Health, Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Tartu, Estonia
| | - Luule Metspalu
- Chair of Plant Health, Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Tartu, Estonia
| | - Marika Mänd
- Chair of Plant Health, Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Tartu, Estonia
| |
Collapse
|
9
|
Raimets R, Bontšutšnaja A, Bartkevics V, Pugajeva I, Kaart T, Puusepp L, Pihlik P, Keres I, Viinalass H, Mänd M, Karise R. Pesticide residues in beehive matrices are dependent on collection time and matrix type but independent of proportion of foraged oilseed rape and agricultural land in foraging territory. Chemosphere 2020; 238:124555. [PMID: 31454746 DOI: 10.1016/j.chemosphere.2019.124555] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Revised: 08/05/2019] [Accepted: 08/09/2019] [Indexed: 06/10/2023]
Abstract
Pesticide residues in bee products is still a major issue. However, the relations to botanical source and land use characteristics are not clear. The large variability of residues detected questions the suitability of bee-collected- and other hive materials as indicators for environmental contamination. The aim of our study was to clarify whether different beehive matrices contain similar pesticide residues, and how these are correlated with forage preferences and land use types in foraging areas. We tested bee-collected pollen, beebread, honey, nurse bees and honey bee larvae for the presence of concurrently used agricultural pesticides in Estonia. Samples were collected at the end of May and mid-July to include the main crop in northern region - winter and spring oilseed rape (Brassica napus). We saw that different beehive matrices contained various types of pesticide residues in different proportions: pollen and beebread tended to contain more insecticides and fungicides, whereas herbicides represented the primary contaminant in honey. The variations were related to collection year and time but were not related to crops as basic forage resource nor the land use type. We found few positive correlations between amount of pesticides and proportion of pollen from any particular plant family. None of these correlations were related to any land-use type. We conclude that pesticide residues in different honey bee colony components vary largely in amount and composition. The occurrence rate of pesticide residues was not linked to any particular crop.
Collapse
Affiliation(s)
- Risto Raimets
- Department of Plant Protection, Institute of Agricultural and Environmental Sciences, Estonian Univesity of Life Sciences, Kreutzwaldi 1, 51014, Tartu, Estonia.
| | - Anna Bontšutšnaja
- Department of Plant Protection, Institute of Agricultural and Environmental Sciences, Estonian Univesity of Life Sciences, Kreutzwaldi 1, 51014, Tartu, Estonia
| | - Vadims Bartkevics
- Institute of Food Safety, Animal Health and Environment "BIOR", Lejupes Street 3, Riga, LV-1076, Latvia
| | - Iveta Pugajeva
- Institute of Food Safety, Animal Health and Environment "BIOR", Lejupes Street 3, Riga, LV-1076, Latvia
| | - Tanel Kaart
- Department of Animal Genetics and Breeding, Institute of Veterinary Medicine and Animal Sciences, Estonian University of Life Sciences, Kreutzwaldi 1, 51014, Tartu, Estonia
| | - Liisa Puusepp
- School of Natural Sciences and Health, Institute of Ecology, Tallinn University, Uus-Sadama 5, 10120, Tallinn, Estonia
| | - Priit Pihlik
- Department of Animal Genetics and Breeding, Institute of Veterinary Medicine and Animal Sciences, Estonian University of Life Sciences, Kreutzwaldi 1, 51014, Tartu, Estonia
| | - Indrek Keres
- Department of Field Crops and Grassland Husbandry, Institute of Agricultural and Environmental Sciences, Estonian Univesity of Life Sciences, Kreutzwaldi 1, 51014, Tartu, Estonia
| | - Haldja Viinalass
- Department of Animal Genetics and Breeding, Institute of Veterinary Medicine and Animal Sciences, Estonian University of Life Sciences, Kreutzwaldi 1, 51014, Tartu, Estonia
| | - Marika Mänd
- Department of Plant Protection, Institute of Agricultural and Environmental Sciences, Estonian Univesity of Life Sciences, Kreutzwaldi 1, 51014, Tartu, Estonia
| | - Reet Karise
- Department of Plant Protection, Institute of Agricultural and Environmental Sciences, Estonian Univesity of Life Sciences, Kreutzwaldi 1, 51014, Tartu, Estonia
| |
Collapse
|
10
|
Maebe K, Karise R, Meeus I, Mänd M, Smagghe G. Level of Genetic Diversity in European Bumblebees is Not Determined by Local Species Abundance. Front Genet 2019; 10:1262. [PMID: 31921301 PMCID: PMC6914865 DOI: 10.3389/fgene.2019.01262] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Accepted: 11/15/2019] [Indexed: 11/25/2022] Open
Abstract
Bumblebee species with declining population trends tend to show lower genetic diversity levels than stable species. The observed difference might be explained by abundance differences, with declining bumblebee species having lower genetic diversity levels simply due to their lower local species abundances. However, whether this holds true is not known. Here, we investigated whether bumblebee local abundances determines population genetic diversity levels. Therefore, local species abundances were measured for bumblebee species at four locations in Belgium and two locations in Estonia during bumblebee foraging years 2013–2017. These locations and countries were chosen to ensure the greatest possible variance in both local abundances and population trends for these species. Hence, genetic diversity levels were obtained for seven species by genotyping collected specimens with 16 microsatellites. Our results showed that the observed patterns in genetic diversity did not depend on local species abundance. So, although declining bumblebee species can become locally abundant, they will still show lower genetic diversity levels than stable species. This result implies that measuring bumblebees’ local abundance cannot be used to directly determine the health status of a population. Furthermore, this result has also major impact on future conservation strategies as increasing the genetic diversity levels of declining species will be very difficult, and habitat quality should be high to maintain their populations, otherwise these species are doomed to disappear first.
Collapse
Affiliation(s)
- Kevin Maebe
- Department of Plants and Crops, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
| | - Reet Karise
- Institute of Agricultural and Environmental Sciences, University of Life Sciences, Tartu, Estonia
| | - Ivan Meeus
- Department of Plants and Crops, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
| | - Marika Mänd
- Institute of Agricultural and Environmental Sciences, University of Life Sciences, Tartu, Estonia
| | - Guy Smagghe
- Department of Plants and Crops, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
| |
Collapse
|
11
|
Hiiesaar K, Kaart T, Williams IH, Luik A, Metspalu L, Ploomi A, Kruus E, Jõgar K, Mänd M. Dynamics of Supercooling Ability and Cold Tolerance of the Alder Beetle (Coleoptera: Chrysomelidae). Environ Entomol 2018; 47:1024-1029. [PMID: 29850836 DOI: 10.1093/ee/nvy075] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Indexed: 06/08/2023]
Abstract
Agelastica alni L. (Coleoptera: Chrysomelidae) is a common beetle pest of alder trees (Alnus incana L.) in forests and parks across Estonia. The supercooling ability and capacity to survive low temperature exposure changes temporally. Relatively high unimodal supercooling point (SCP) levels (with a mean value of -6 to -8°C) were characteristic of the beetles in September during their diapause induction period, in April when the beetles had terminated their diapause development and in May when they started to reproduce. During their deep diapause period the SCPs of beetles had a bimodal distribution. Some beetles decreased their SCPs to -14 to -19°C while others retained a high SCP value of -6 to -8°C. Most vulnerable to low temperature were overwintered active beetles in May; after 1 h exposure their LTemp50 (median lethal temperature) was -6.3°C. In September with the onset of diapause tolerance of beetles started to increase, LTemp50 = -7.7°C. Beetles were most cold tolerant during their deep diapause period with LTemp50 < -12.0°C. A. alni beetles use one of two different strategies for overwintering, some are freeze-tolerant while others are freeze-avoidant. The freeze-avoidant beetles with low SCP (-12 to -15°C) acquired greater cold tolerance than those with higher SCP (-6 to -8°C), with LTemp50 = -13.7°C and LTemp50 = -11°C, respectively.
Collapse
Affiliation(s)
- Külli Hiiesaar
- Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Kreutzwaldi, Tartu, Estonia
| | - Tanel Kaart
- Institute of Veterinary Medicine and Animal Sciences, Estonian University of Life Sciences, Kreutzwaldi, Tartu, Estonia
| | - Ingrid H Williams
- Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Kreutzwaldi, Tartu, Estonia
| | - Anne Luik
- Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Kreutzwaldi, Tartu, Estonia
| | - Luule Metspalu
- Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Kreutzwaldi, Tartu, Estonia
| | - Angela Ploomi
- Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Kreutzwaldi, Tartu, Estonia
| | - Eha Kruus
- Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Kreutzwaldi, Tartu, Estonia
| | - Katrin Jõgar
- Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Kreutzwaldi, Tartu, Estonia
| | - Marika Mänd
- Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Kreutzwaldi, Tartu, Estonia
| |
Collapse
|
12
|
Krams I, Trakimas G, Kecko S, Elferts D, Krams R, Luoto S, Rantala MJ, Mänd M, Kuusik A, Kekäläinen J, Jõers P, Kortet R, Krama T. Linking organismal growth, coping styles, stress reactivity, and metabolism via responses against a selective serotonin reuptake inhibitor in an insect. Sci Rep 2018; 8:8599. [PMID: 29872133 PMCID: PMC5988682 DOI: 10.1038/s41598-018-26722-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2017] [Accepted: 05/15/2018] [Indexed: 01/21/2023] Open
Abstract
Evidence suggests that brain serotonin (5-HT) is one of the central mediators of different types of animal personality. We tested this assumption in field crickets Gryllus integer using a selective serotonin reuptake inhibitor (SSRI). Crickets were selected for slow and rapid development and tested for their coping styles under non-stressful conditions (time spent exploring a novel object). Resting metabolic rate, maximum metabolic rate and latency to resume activity were measured under stressful conditions (stress reactivity). Measurements were taken (i) before and (ii) during the SSRI treatment. Before the SSRI treatment, a strong negative correlation was observed between coping style and stress reactivity, which suggests the existence of a behavioral syndrome. After the SSRI treatment, the syndrome was no longer evident. The results of this study show that 5-HT may be involved in regulating behavior not only along a stress reactivity gradient but also along a coping styles axis. The relationship between personality and the strength and direction of 5-HT treatment on observed behaviors indicates trait-like individual differences in 5-HT signaling. Overall, these findings do not support recent ideas arising from the pace-of-life syndrome (POLS) hypothesis, which predict higher exploration and metabolic rates in rapidly developing bold animals.
Collapse
Affiliation(s)
- Indrikis Krams
- Institute of Ecology and Earth Sciences, University of Tartu, Tartu, Estonia.
- Department of Zoology and Animal Ecology, Faculty of Biology, University of Latvia, Rīga, Latvia.
- University of Tennessee, Department of Psychology, Knoxville, USA.
| | - Giedrius Trakimas
- Institute of Biosciences, Vilnius University, Vilnius, Lithuania
- Department of Biotechnology, Institute of Life Sciences and Technology, Daugavpils University, Daugavpils, Latvia
| | - Sanita Kecko
- Department of Biotechnology, Institute of Life Sciences and Technology, Daugavpils University, Daugavpils, Latvia
| | - Didzis Elferts
- Department of Botany and Ecology, Faculty of Biology, University of Latvia, Rīga, Latvia
| | - Ronalds Krams
- Department of Biotechnology, Institute of Life Sciences and Technology, Daugavpils University, Daugavpils, Latvia
| | - Severi Luoto
- English, Drama and Writing Studies, University of Auckland, Auckland, New Zealand
- School of Psychology, University of Auckland, Auckland, New Zealand
| | - Markus J Rantala
- Department of Biology & Turku Brain and Mind Centre, University of Turku, Turku, Finland
| | - Marika Mänd
- Department of Plant Protection, Institute of Agricultural and Environmental Sciences, Estonian University of Life Science, Tartu, Estonia
| | - Aare Kuusik
- Department of Plant Protection, Institute of Agricultural and Environmental Sciences, Estonian University of Life Science, Tartu, Estonia
| | - Jukka Kekäläinen
- Department of Environmental and Biological Sciences, University of Eastern Finland, Joensuu, Finland
| | - Priit Jõers
- Insttute of Molecular and Cell Biology, University of Tartu, Tartu, Estonia
| | - Raine Kortet
- Department of Environmental and Biological Sciences, University of Eastern Finland, Joensuu, Finland
| | - Tatjana Krama
- Department of Biotechnology, Institute of Life Sciences and Technology, Daugavpils University, Daugavpils, Latvia
- Department of Plant Protection, Institute of Agricultural and Environmental Sciences, Estonian University of Life Science, Tartu, Estonia
| |
Collapse
|
13
|
Raimets R, Karise R, Mänd M, Kaart T, Ponting S, Song J, Cresswell JE. Synergistic interactions between a variety of insecticides and an ergosterol biosynthesis inhibitor fungicide in dietary exposures of bumble bees (Bombus terrestris L.). Pest Manag Sci 2018; 74:541-546. [PMID: 28991419 DOI: 10.1002/ps.4756] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Revised: 09/07/2017] [Accepted: 10/02/2017] [Indexed: 05/07/2023]
Abstract
BACKGROUND In recent years, concern has been raised over honey bee colony losses, and also among wild bees there is evidence for extinctions and range contractions in Europe and North America. Pesticides have been proposed as a potential cause of this decline. Bees are exposed simultaneously to a variety of agrochemicals, which may cause synergistically detrimental impacts, which are incompletely understood. We investigated the toxicity of the fungicide imazalil in mixture with four common insecticides: fipronil (phenylpyrazoid), cypermethrin (pyrethroid), thiamethoxam, and imidacloprid (neonicotinoids). Ergosterol biosynthesis inhibitor (EBI) fungicides like imazalil can inhibit P450 detoxification systems in insects and therefore fungicide - insecticide co-occurrence might produce synergistic toxicity in bees. We assessed the impact of dietary fungicide - insecticide mixtures on the mortality and feeding rates of laboratory bumble bees (Bombus terrestris L.). RESULTS Regarding mortality, imazalil synergised the toxicity of fipronil, cypermethrin and thiamethoxam, but not imidacloprid. We found no synergistic effects on feeding rates. CONCLUSION Our findings suggest that P450-based detoxification processes are differentially important in mitigating the toxicity of certain insecticides, even those of the same chemical class. Our evidence that cocktail effects can arise in bumble bees should extend concern about the potential impacts of agrochemical mixtures to include wild bee species in farmland. © 2017 Society of Chemical Industry.
Collapse
Affiliation(s)
- Risto Raimets
- Department of Plant Protection, Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Tartu, Estonia
| | - Reet Karise
- Department of Plant Protection, Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Tartu, Estonia
| | - Marika Mänd
- Department of Plant Protection, Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Tartu, Estonia
| | - Tanel Kaart
- Department of Animal Genetics and Breeding, Institute of Veterinary Medicine and Animal Sciences, Estonian University of Life Sciences, Tartu, Estonia
| | - Sally Ponting
- Biosciences, College of Life and Environmental Sciences, University of Exeter, Exeter, UK
| | - Jimao Song
- Biosciences, College of Life and Environmental Sciences, University of Exeter, Exeter, UK
| | - James E Cresswell
- Biosciences, College of Life and Environmental Sciences, University of Exeter, Exeter, UK
| |
Collapse
|
14
|
Marja R, Viik E, Mänd M, Phillips J, Klein AM, Batáry P. Crop rotation and agri-environment schemes determine bumblebee communities via flower resources. J Appl Ecol 2018. [DOI: 10.1111/1365-2664.13119] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Riho Marja
- Estonian Environment Agency; Tartu Estonia
| | - Eneli Viik
- Agricultural Research Centre; Saku Estonia
| | - Marika Mänd
- Institute of Agricultural and Environmental Sciences; Estonian University of Life Sciences; Tartu Estonia
| | - James Phillips
- School of Environment and Technology; University of Brighton; Brighton UK
| | | | - Péter Batáry
- Agroecology; University of Goettingen; Göttingen Germany
- GINOP Sustainable Ecosystems Group; MTA Centre for Ecological Research; Tihany Hungary
| |
Collapse
|
15
|
Nurme K, Merivee E, Must A, Di Giulio A, Muzzi M, Williams I, Mänd M. Bursty spike trains of antennal thermo- and bimodal hygro-thermoreceptor neurons encode noxious heat in elaterid beetles. J Therm Biol 2018; 72:101-117. [PMID: 29496003 DOI: 10.1016/j.jtherbio.2018.01.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2017] [Revised: 01/17/2018] [Accepted: 01/21/2018] [Indexed: 11/16/2022]
Abstract
The main purpose of this study was to explain the internal fine structure of potential antennal thermo- and hygroreceptive sensilla, their innervation specifics, and responses of the sensory neurons to thermal and humidity stimuli in an elaterid beetle using focused ion beam scanning electron microscopy and electrophysiology, respectively. Several essential, high temperature induced turning points in the locomotion were determined using automated video tracking. Our results showed that the sensilla under study, morphologically, are identical to the dome-shaped sensilla (DSS) of carabids. A cold-hot neuron and two bimodal hygro-thermoreceptor neurons, the moist-hot and dry-hot neuron, innervate them. Above 25-30 °C, all the three neurons, at different threshold temperatures, switch from regular spiking to temperature dependent spike bursting. The percentage of bursty DSS neurons on the antenna increases with temperature increase suggesting that this parameter of the neurons may encode noxious heat in a graded manner. Thus, we show that besides carabid beetles, elaterids are another large group of insects with this ability. The threshold temperature of the beetles for onset of elevated locomotor activity (OELA) was lower by 11.9 °C compared to that of critical thermal maximum (39.4 °C). Total paralysis occurred at 41.8 °C. The threshold temperatures for spike bursting of the sensory neurons in DSS and OELA of the beetles coincide suggesting that probably the spike bursts are responsible for encoding noxious heat when confronted. In behavioural thermoregulation, spike bursting DSS neurons serve as a fast and firm three-fold early warning system for the beetles to avoid overheating and death.
Collapse
Affiliation(s)
- Karin Nurme
- Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Kreutzwaldi Street 1, 51014 Tartu, Estonia.
| | - Enno Merivee
- Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Kreutzwaldi Street 1, 51014 Tartu, Estonia
| | - Anne Must
- Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Kreutzwaldi Street 1, 51014 Tartu, Estonia
| | - Andrea Di Giulio
- Department of Science, University of Roma Tre, Viale G. Marconi 446, I-00146 Rome, Italy
| | - Maurizio Muzzi
- Department of Science, University of Roma Tre, Viale G. Marconi 446, I-00146 Rome, Italy
| | - Ingrid Williams
- Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Kreutzwaldi Street 1, 51014 Tartu, Estonia
| | - Marika Mänd
- Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Kreutzwaldi Street 1, 51014 Tartu, Estonia
| |
Collapse
|
16
|
Krams IA, Niemelä PT, Trakimas G, Krams R, Burghardt GM, Krama T, Kuusik A, Mänd M, Rantala MJ, Mänd R, Kekäläinen J, Sirkka I, Luoto S, Kortet R. Metabolic rate associates with, but does not generate covariation between, behaviours in western stutter-trilling crickets, Gryllus integer. Proc Biol Sci 2018; 284:rspb.2016.2481. [PMID: 28330918 DOI: 10.1098/rspb.2016.2481] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2016] [Accepted: 02/20/2017] [Indexed: 11/12/2022] Open
Abstract
The causes and consequences of among-individual variation and covariation in behaviours are of substantial interest to behavioural ecology, but the proximate mechanisms underpinning this (co)variation are still unclear. Previous research suggests metabolic rate as a potential proximate mechanism to explain behavioural covariation. We measured the resting metabolic rate (RMR), boldness and exploration in western stutter-trilling crickets, Gryllus integer, selected differentially for short and fast development over two generations. After applying mixed-effects models to reveal the sign of the covariation, we applied structural equation models to an individual-level covariance matrix to examine whether the RMR generates covariation between the measured behaviours. All traits showed among-individual variation and covariation: RMR and boldness were positively correlated, RMR and exploration were negatively correlated, and boldness and exploration were negatively correlated. However, the RMR was not a causal factor generating covariation between boldness and exploration. Instead, the covariation between all three traits was explained by another, unmeasured mechanism. The selection lines differed from each other in all measured traits and significantly affected the covariance matrix structure between the traits, suggesting that there is a genetic component in the trait integration. Our results emphasize that interpretations made solely from the correlation matrix might be misleading.
Collapse
Affiliation(s)
- Indrikis A Krams
- Institute of Ecology and Earth Sciences, University of Tartu, Tartu 51014, Estonia .,Department of Psychology, University of Tennessee, Knoxville, TN 37996-0900, USA
| | - Petri T Niemelä
- Behavioural Ecology, Department of Biology II, Ludwig-Maximilians University of Munich, Germany
| | - Giedrius Trakimas
- Department of Biotechnology, Institute of Life Sciences and Technology, Daugavpils University, Daugavpils LV5401, Latvia.,Centre for Ecology and Environmental Research, Vilnius University, Vilnius LT10257, Lithuania
| | - Ronalds Krams
- Department of Biotechnology, Institute of Life Sciences and Technology, Daugavpils University, Daugavpils LV5401, Latvia
| | - Gordon M Burghardt
- Department of Psychology, University of Tennessee, Knoxville, TN 37996-0900, USA.,Department of Ecology and Evolutionary Biology, University of Tennessee, Knoxville, TN 37996-0900, USA
| | - Tatjana Krama
- Department of Plant Protection, Institute of Agricultural and Environmental Sciences, Estonian University of Life Science, Tartu 51014, Estonia
| | - Aare Kuusik
- Department of Plant Protection, Institute of Agricultural and Environmental Sciences, Estonian University of Life Science, Tartu 51014, Estonia
| | - Marika Mänd
- Department of Plant Protection, Institute of Agricultural and Environmental Sciences, Estonian University of Life Science, Tartu 51014, Estonia
| | - Markus J Rantala
- Department of Biology & Turku Brain and Mind Centre, University of Turku, Turku, Finland
| | - Raivo Mänd
- Institute of Ecology and Earth Sciences, University of Tartu, Tartu 51014, Estonia
| | - Jukka Kekäläinen
- Department of Environmental and Biological Sciences, University of Eastern Finland, Joensuu 80101, Finland
| | - Ilkka Sirkka
- Department of Environmental and Biological Sciences, University of Eastern Finland, Joensuu 80101, Finland
| | - Severi Luoto
- English, Drama and Writing Studies, and School of Psychology, University of Auckland, Auckland 1010, New Zealand
| | - Raine Kortet
- Department of Environmental and Biological Sciences, University of Eastern Finland, Joensuu 80101, Finland
| |
Collapse
|
17
|
Karise R, Raimets R, Bartkevics V, Pugajeva I, Pihlik P, Keres I, Williams IH, Viinalass H, Mänd M. Are pesticide residues in honey related to oilseed rape treatments? Chemosphere 2017; 188:389-396. [PMID: 28898772 DOI: 10.1016/j.chemosphere.2017.09.013] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Revised: 09/02/2017] [Accepted: 09/04/2017] [Indexed: 06/07/2023]
Abstract
Pesticide treatments before and during the flowering of honey bee forage crops may lead to residues in honey. In northern regions oilseed rape belongs to the main forage crops that is mostly cultivated by means of intensive agriculture, including several pesticide treatments. However, in addition to the focal forage crops, pesticides from non-forage crops can spread to wild flowers around fields, and thus the residues in honey would reflect the whole range of pesticides used in the agricultural landscape. The aim of our study was to clarify which currently used pesticides are present in honey gathered from heterogeneous agricultural landscapes after the end of flowering of oilseed crops. Honey samples (N = 33) were collected from beehives of Estonia during 2013 and 2014, and analysed for residues of 47 currently used agricultural pesticides using the multiresidue method with HPLC-MS/MS and GC-MS and a single residue method for glyphosate, aminopyralid and clopyralid. Residues of eight different active ingredients with representatives from all three basic pesticide classes were determined. Although no correlation was detected between the cumulative amount of pesticide residues and percent of oilseed crops in the foraging territory, most of the residues are those allowed for oilseed rape treatments. Among all pesticides, herbicide residues prevailed in 2013 but not in 2014. Despite the relatively small agricultural impact of Estonia, the detected levels of pesticide residues sometimes exceeded maximum residue level; however, these concentrations do not pose a health risk to consumers, also acute toxicity to honey bees would be very unlikely.
Collapse
Affiliation(s)
- Reet Karise
- Department of Plant Protection, Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Kreutzwaldi 1, 51014, Tartu, Estonia.
| | - Risto Raimets
- Department of Plant Protection, Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Kreutzwaldi 1, 51014, Tartu, Estonia
| | - Vadims Bartkevics
- Institute of Food Safety, Animal Health and Environment "BIOR", Lejupes Street 3, Riga, LV-1076, Latvia
| | - Iveta Pugajeva
- Institute of Food Safety, Animal Health and Environment "BIOR", Lejupes Street 3, Riga, LV-1076, Latvia
| | - Priit Pihlik
- Department of Animal Genetics and Breeding, Institute of Veterinary Medicine and Animal Sciences, Estonian University of Life Sciences, Kreutzwaldi 1, 51014, Tartu, Estonia
| | - Indrek Keres
- Department of Field Crops and Grassland Husbandry, Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Kreutzwaldi 1, 51014, Tartu, Estonia
| | - Ingrid H Williams
- Department of Plant Protection, Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Kreutzwaldi 1, 51014, Tartu, Estonia
| | - Haldja Viinalass
- Department of Animal Genetics and Breeding, Institute of Veterinary Medicine and Animal Sciences, Estonian University of Life Sciences, Kreutzwaldi 1, 51014, Tartu, Estonia
| | - Marika Mänd
- Department of Plant Protection, Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Kreutzwaldi 1, 51014, Tartu, Estonia
| |
Collapse
|
18
|
Karise R, Dreyersdorff G, Jahani M, Veromann E, Runno-Paurson E, Kaart T, Smagghe G, Mänd M. Reliability of the entomovector technology using Prestop-Mix and Bombus terrestris L. as a fungal disease biocontrol method in open field. Sci Rep 2016; 6:31650. [PMID: 27530075 PMCID: PMC4987692 DOI: 10.1038/srep31650] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2016] [Accepted: 07/21/2016] [Indexed: 11/09/2022] Open
Abstract
Botrytis cinerea Pers.:Fr. is a major plant pathogen, and a new approach is needed for its control in strawberry to minimise the increasing use of synthetic fungicides. The biofungicide Prestop-Mix, which contains Gliocladium catenulatum, is effective against Botrytis infections; however, the need for frequent applications increases the costs for farmers. Here, we demonstrate that bumble bees, Bombus terrestris L., effectively disseminate the preparation onto flowers in open field conditions. Over the course of three years, we found a highly significant decrease in the rate of Botrytis infection. Pathogen control was achieved with relatively low numbers of G. catenulatum spores per flower, even using flowers that are not highly attractive to bumble bees. An even distribution of spores was detected up to 100 m from the hives, either due to primary inoculation by bumble bees or secondary distribution by other flower visitors such as honey bees and solitary bees. We showed that the application of a biocontrol agent by bumble bees is reliable for the use of environmentally friendly pest control strategies in northern climatic conditions. This low cost technology is especially relevant for organic farming. This study provides valuable information for introducing this method into practice in open strawberry fields.
Collapse
Affiliation(s)
- Reet Karise
- Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Kreutzwaldi 1, 51014 Tartu, Estonia
| | - Gerit Dreyersdorff
- Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Kreutzwaldi 1, 51014 Tartu, Estonia
| | - Mona Jahani
- Department of Crop Protection, Ghent University, Coupure links 653, B-9000, Ghent, Belgium
| | - Eve Veromann
- Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Kreutzwaldi 1, 51014 Tartu, Estonia
| | - Eve Runno-Paurson
- Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Kreutzwaldi 1, 51014 Tartu, Estonia
| | - Tanel Kaart
- Institute of Veterinary Medicine and Animal Sciences, Estonian University of Life Sciences, Kreutzwaldi 62, 51014 Tartu, Estonia
| | - Guy Smagghe
- Department of Crop Protection, Ghent University, Coupure links 653, B-9000, Ghent, Belgium
| | - Marika Mänd
- Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Kreutzwaldi 1, 51014 Tartu, Estonia
| |
Collapse
|
19
|
Kuusik A, Jõgar K, Metspalu L, Ploomi A, Merivee E, Must A, Williams IH, Hiiesaar K, Sibul I, Mänd M. The opening-closing rhythms of the subelytral cavity associated with gas exchange patterns in diapausing Colorado potato beetle, Leptinotarsa decemlineata. J Exp Biol 2016; 219:3412-3419. [DOI: 10.1242/jeb.142489] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2016] [Accepted: 08/20/2016] [Indexed: 11/20/2022]
Abstract
The opening-closing rhythms of the subelytral cavity and associated gas exchange patterns were monitored in diapausing Leptinotarsa decemlineata beetles. Measurements were made by means of a flow-through CO2 analyser and a coulometric respirometer. Under the elytra of these beetles there is a more or less tightly enclosed space, the subelytral cavity (SEC). When the cavity was tightly closed, air pressure inside was sub-atmospheric, due to oxygen uptake into the tracheae by the beetle. In about half of the beetles regular opening-closing rhythms of the SEC were observed visually and also recorded; these beetles displayed a discontinuous gas exchange (DGE) pattern. The SEC opened at the start of the CO2 burst and was immediately closed. On opening a rapid passive suction inflow of atmospheric air into the SEC occurred, recorded coulometrically as a sharp upward peak. As the CO2 burst lasted beyond the closure of the SEC, we suggest that most of the CO2 was expelled through the mesothoracic spiracles. In the other half of the beetles the SEC was continually semi-open, and cyclic gas exchange (CGE) was exhibited. The locking mechanisms and structures between the elytra and between the elytra and the body were examined under a stereomicroscope and by means of micro-photography. We concluded that at least some of the L. decemlineata diapausing beetles were able to close their subelytral cavity tightly, and that the cavity then served as a water saving device.
Collapse
Affiliation(s)
- Aare Kuusik
- Department of Plant Protection, Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Kreutzwaldi 1, Tartu, 51014, Estonia
| | - Katrin Jõgar
- Department of Plant Protection, Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Kreutzwaldi 1, Tartu, 51014, Estonia
| | - Luule Metspalu
- Department of Plant Protection, Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Kreutzwaldi 1, Tartu, 51014, Estonia
| | - Angela Ploomi
- Department of Plant Protection, Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Kreutzwaldi 1, Tartu, 51014, Estonia
| | - Enno Merivee
- Department of Plant Protection, Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Kreutzwaldi 1, Tartu, 51014, Estonia
| | - Anne Must
- Department of Plant Protection, Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Kreutzwaldi 1, Tartu, 51014, Estonia
| | - Ingrid H. Williams
- Department of Plant Protection, Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Kreutzwaldi 1, Tartu, 51014, Estonia
| | - Külli Hiiesaar
- Department of Plant Protection, Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Kreutzwaldi 1, Tartu, 51014, Estonia
| | - Ivar Sibul
- Department of Silviculture, Institute of Forestry and Rural Engineering, Estonian University of Life Sciences, Kreutzwaldi 5, Tartu, 51014, Estonia
| | - Marika Mänd
- Department of Plant Protection, Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Kreutzwaldi 1, Tartu, 51014, Estonia
| |
Collapse
|
20
|
|
21
|
Mirmajlessi SM, Destefanis M, Gottsberger RA, Mänd M, Loit E. PCR-based specific techniques used for detecting the most important pathogens on strawberry: a systematic review. Syst Rev 2015; 4:9. [PMID: 25588564 PMCID: PMC4320524 DOI: 10.1186/2046-4053-4-9] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2014] [Accepted: 01/02/2015] [Indexed: 01/03/2023] Open
Abstract
BACKGROUND Strawberry diseases are a major limiting factor that severely impact plant agronomic performance. Regarding limitations of traditional techniques for detection of pathogens, researchers have developed specific DNA-based tests as sensitive and specific techniques. The aim of this review is to provide an overview of polymerase chain reaction (PCR)-based methods used for detection or quantification of the most widespread strawberry pathogens, such as Fusarium oxysporum f.sp. fragariae, Phytophthora fragariae, Colletotrichum acutatum, Verticillium dahliae, Botrytis cinerea, Macrophomina phaseolina, and Xanthomonas fragariae. An updated and detailed list of published PCR protocols is presented and discussed, aimed at facilitating access to information that could be particularly useful for diagnostic laboratories in order to develop a rapid, cost-effective, and reliable monitoring technique. METHODS The study design was a systematic review of PCR-based techniques used for detection and quantification of strawberry pathogens. Using appropriate subject headings, AGRICOLA, AGRIS, BASE, Biological Abstracts, CAB Abstracts, Google Scholar, Scopus, Web of Knowledge, and SpringerLink databases were searched from their inception up to April 2014. Two assessors independently reviewed the titles, abstracts, and full articles of all identified citations. Selected articles were included if one of the mentioned strawberry pathogens was investigated based on PCR methods, and a summary of pre-analytical requirements for PCR was provided. RESULTS A total of 259 titles and abstracts were reviewed, of which 22 full texts met all the inclusion criteria. Our systematic review identified ten different protocols for X. fragariae, eight for P. fragariae, four for B. cinerea, six for C. acutatum, three for V. dahlia, and only one for F. oxysporum. The accuracy and sensitivity of PCR diagnostic methods is the focus of most studies included in this review. However, a large proportion of errors in laboratories occur in the pre-analytical phase of the testing process. Due to heterogeneity, results could not be meta-analyzed. CONCLUSIONS From a systematic review of the currently available published literature, effective detection assays to detect the major strawberry pathogens have been developed. These assays can function as a basis for clinical labs, regulatory personnel, and other diagnosticians to adapt or implement for detection of these six important strawberry pathogens.
Collapse
Affiliation(s)
- Seyed Mahyar Mirmajlessi
- />Department of Field Crops and Grassland Husbandry, Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Tartu, Estonia
| | - Marialaura Destefanis
- />Pesticides, Plant Health and Seed Testing Laboratories, Department of Agriculture, Food and the Marine, Backweston Campus, Celbridge, Co. Kildare Ireland
| | - Richard Alexander Gottsberger
- />Department for Molecular Diagnostics of Plant Diseases, Institute for Sustainable Plant Production, Austrian Agency for Health and Food Safety (AGES), Vienna, Austria
| | - Marika Mänd
- />Department of Plant Protection, Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Tartu, Estonia
| | - Evelin Loit
- />Department of Field Crops and Grassland Husbandry, Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Tartu, Estonia
| |
Collapse
|
22
|
Krams IA, Krama T, Moore FR, Kivleniece I, Kuusik A, Freeberg TM, Mänd R, Rantala MJ, Daukšte J, Mänd M. Male mealworm beetles increase resting metabolic rate under terminal investment. J Evol Biol 2014; 27:541-50. [DOI: 10.1111/jeb.12318] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2013] [Revised: 12/10/2013] [Accepted: 12/10/2013] [Indexed: 12/15/2022]
Affiliation(s)
- I. A. Krams
- Institute of Systematic Biology; University of Daugavpils; Daugavpils Latvia
- Institute of Ecology and Earth Sciences; University of Tartu; Tartu Estonia
- Department of Biology; University of Turku; Turku Finland
| | - T. Krama
- Institute of Systematic Biology; University of Daugavpils; Daugavpils Latvia
| | - F. R. Moore
- School of Psychology; University of Dundee; Dundee UK
| | - I. Kivleniece
- Institute of Systematic Biology; University of Daugavpils; Daugavpils Latvia
| | - A. Kuusik
- Department of Plant Protection; Institute of Agricultural and Environmental Sciences; Estonian University of Life Science; Tartu Estonia
| | - T. M. Freeberg
- Department of Psychology and Department of Ecology and Evolutionary Biology; University of Tennessee; Knoxville TN USA
| | - R. Mänd
- Institute of Ecology and Earth Sciences; University of Tartu; Tartu Estonia
| | - M. J. Rantala
- Department of Biology; University of Turku; Turku Finland
| | - J. Daukšte
- Institute of Food Safety; Animal Health and Environment “BIOR”; Riga Latvia
| | - M. Mänd
- Department of Plant Protection; Institute of Agricultural and Environmental Sciences; Estonian University of Life Science; Tartu Estonia
| |
Collapse
|
23
|
Starast M, Tasa T, Mänd M, Vool E, Paal T, Karp K. EFFECT OF CULTIVATION AREA ON LOWBUSH BLUEBERRY NECTAR PRODUCTION AND POLLINATOR COMPOSITION. ACTA ACUST UNITED AC 2014. [DOI: 10.17660/actahortic.2014.1017.58] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
24
|
Muljar R, Karise R, Viik E, Kuusik A, Williams I, Metspalu L, Hiiesaar K, Must A, Luik A, Mänd M. Effects of Fastac 50 EC on bumble bee Bombus terrestris L. respiration: DGE disappearance does not lead to increasing water loss. J Insect Physiol 2012; 58:1469-1476. [PMID: 22960306 DOI: 10.1016/j.jinsphys.2012.08.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2012] [Revised: 08/21/2012] [Accepted: 08/27/2012] [Indexed: 06/01/2023]
Abstract
Sublethal effects of pesticides in insects can be observed through physiological changes, which are commonly estimated by metabolic rate and respiratory patterns, more precisely by the patterns of discontinuous gas-exchange (DGE) cycles. The aim of the present research was to study the effect of some low concentrations of Fastac 50 EC on the cycles of CO(2) release and respiratory water loss rates (WLR) in bumble bee Bombus terrestris L. foragers. Bumble bees were dipped into 0.004% and 0.002% Fastac 50 EC solution. Flow-through respirometry was used to record the respiration and WLR 3h before and after the treatment. The respirometry was combined with infrared actography to enable simultaneous recording of abdominal movements. Our results show that Fastac 50 EC has an after-effect on bumble bee respiratory rhythms and muscle activity but does not affect WLR. Treatment with 0.004% Fastac 50 EC solution resulted in disappearance of the respiration cycles; also the lifespan of treated bumble bees was significantly shorter. Treatment with 0.002% Fastac 50 EC solution had no significant effect on respiration patterns or longevity. We found no evidence for the DGE cycles functioning as a water saving mechanism.
Collapse
Affiliation(s)
- Riin Muljar
- Department of Plant Protection, Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Kreutzwaldi 1, Tartu 51014, Estonia
| | | | | | | | | | | | | | | | | | | |
Collapse
|
25
|
Jõgar K, Kuusik A, Ploomi A, Metspalu L, Williams I, Hiiesaar K, Kivimägi I, Mänd M, Tasa T, Luik A. Oxygen convective uptakes in gas exchange cycles in early diapause pupae of Pieris brassicae. J Exp Biol 2011; 214:2816-22. [PMID: 21832124 DOI: 10.1242/jeb.056051] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Oxygen convective uptakes in gas exchange cycles were directly recorded in early diapause pupae of Pieris brassicae L. (Lepidoptera; Pieridae) by means of O2 coulometric respirometry. This method was combined with flow-through CO2 respirometry, the two systems being switchable one to the other. During recording with both systems, measurements were also taken with infrared actography. The pupae displayed short discontinuous gas exchange cycles lasting 40-70 min. No true C phase was found by flow-through measurements; instead, flutter opening of the spiracles with discrete convective O2 uptakes began shortly after the O phase whereas CO2 release was suppressed by the inward directed passive suction ventilation. The F phase was characterized by a series of small CO2 bursts (flutter events). Between these bursts, novel sub-phase `miniflutter' was observed, which consisted of six to 10 miniature inspirations without any CO2 emission. During the flow-through measurements, oxygen convective uptakes were indirectly recorded by the infrared actograph as sudden extensions (lengthening) of the abdominal segments at each spiracular microopening.
Collapse
Affiliation(s)
- Katrin Jõgar
- Estonian University of Life Sciences, Institute Agricultural and Environmental Sciences, Department of Plant Protection, Kreutzwaldi 1, Tartu 51014, Estonia.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
26
|
Williams IH, Mänd M, Ploomi A, Metspalu L, Vilponis E, Hiiesaar K, Kaart T, Luik A. Low temperature survival of post-eclosion stages of the potato rot nematode Ditylenchus destructor Thorne (Tylenchida: Anguinidae). NEMATOLOGY 2011. [DOI: 10.1163/138855411x571812] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
AbstractThe potato rot nematode, Ditylenchus destructor, may experience extreme environmental stress caused by freezing temperatures when overwintering in the field. A series of laboratory experiments were conducted in order to clarify overwintering strategies of the nematode. The current study aimed to examine the cold tolerance of this species in various aqueous environments as well as in plant tissues in order to determine its ability to survive 24 h exposure to subzero temperatures. Cold tolerance of adults and fourth-stage juveniles was significantly lower than that of younger juveniles. The lower lethal temperature of adults was –15°C. Although external ice formation affects all life stages, a few second-stage juveniles were able to survive temperatures as low as –30°C. The results expand the current understanding of freezing survival in the potato rot nematode and will lead to better comprehension of its ability to withstand subzero temperature conditions.
Collapse
Affiliation(s)
- Ingrid H. Williams
- 7Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Kreutzwaldi 1, 51014 Tartu, Estonia
| | - Marika Mänd
- 5Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Kreutzwaldi 1, 51014 Tartu, Estonia
| | - Angela Ploomi
- 6Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Kreutzwaldi 1, 51014 Tartu, Estonia
| | - Luule Metspalu
- 4Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Kreutzwaldi 1, 51014 Tartu, Estonia
| | - Eha Vilponis
- 1Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Kreutzwaldi 1, 51014 Tartu, Estonia;,
| | - Külli Hiiesaar
- 2Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Kreutzwaldi 1, 51014 Tartu, Estonia
| | - Tanel Kaart
- 3Institute of Veterinary Medicine and Animal Sciences, Estonian University of Life Sciences, Kreutzwaldi 1, 51014 Tartu, Estonia
| | - Anne Luik
- 8Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Kreutzwaldi 1, 51014 Tartu, Estonia
| |
Collapse
|
27
|
Karise R, Kuusik A, Mänd M, Metspalu L, Williams IH, Hiiesaar K, Luik A, Muljar R, Liiv K. Gas exchange patterns of bumble bee foragers before and after exposing to lowered temperature. J Insect Physiol 2010; 56:529-535. [PMID: 19523957 DOI: 10.1016/j.jinsphys.2009.05.017] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2009] [Revised: 05/25/2009] [Accepted: 05/28/2009] [Indexed: 05/27/2023]
Abstract
The gas exchange patterns are known to vary between insect species, individuals and even intra-individually. Using volumetric-manometric and flow-through respirometry combined with IR-actography we studied how periods of low temperature affect the respiratory patterns of bumble bee Bombus terrestris foragers. We have shown, in this study, that there is a change in the respiratory patterns of individual B. terrestris foragers after exposing to low temperatures. The bumble bees seemed to become more inactive. The different respiratory patterns appeared in succession and the transition from one pattern to another was associated with the change from an active to a resting state. Typical patterns after exposition to low temperature were discontinuous gas exchange cycles (DGCs).
Collapse
Affiliation(s)
- R Karise
- Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Kreutzwaldi 1, 51014, Tartu, Estonia.
| | | | | | | | | | | | | | | | | |
Collapse
|
28
|
Merivee E, Märtmann H, Must A, Milius M, Williams I, Mänd M. Electrophysiological responses from neurons of antennal taste sensilla in the polyphagous predatory ground beetle Pterostichus oblongopunctatus (Fabricius 1787) to plant sugars and amino acids. J Insect Physiol 2008; 54:1213-1219. [PMID: 18625236 DOI: 10.1016/j.jinsphys.2008.05.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2008] [Revised: 05/13/2008] [Accepted: 05/19/2008] [Indexed: 05/26/2023]
Abstract
The responses of antennal contact chemoreceptors, in the polyphagous predatory ground beetle Pterostichus oblongopunctatus, to twelve 1-1,000 mmol l(-1) plant sugars and seven 10-100 mmol l(-1) amino acids were tested. The disaccharides with an alpha-1.4-glycoside linkage, sucrose and maltose, were the two most stimulatory sugars for the sugar-sensitive neuron innervating these contact chemosensilla. The firing rates they evoked were concentration dependent and reached up to 70 impulses/s at 1,000 mmol l(-1). The stimulatory effect of glucose on this neuron was approximately two times lower. This can be partly explained by the fact that glucose exists in at least two anomeric forms, alpha and beta. These two forms interconvert over a timescale of hours in aqueous solution, to a final stable ratio of alpha:beta 36:64, in a process called mutarotation. So the physiologically active alpha-anomere forms only 36% of the glucose solution which was reflected in its relatively low dose/response curve. Due to the partial herbivory of P. oblongopunctatus these plant sugars are probably involved in its search for food, for example, for conifer seeds. Several carbohydrates, in addition to glucose, such as cellobiose, arabinose, xylose, mannose, rhamnose and galactose are known as components of cellulose and hemicelluloses. They are released by brown-rot fungi during enzymatic wood decay. None of them stimulated the antennal sugar-sensitive neuron. They are therefore not implicated in the search for hibernation sites, which include rotting wood, by this beetle. The weak stimulating effect (below 3 impulses/s) of some 100 mmol l(-1) amino acids (methionine, serine, alanine, glutamine) to the 4th chemosensory neuron of these sensilla was characterized as non-specific, or modulating the responses of non-target chemosensory neurons.
Collapse
Affiliation(s)
- Enno Merivee
- Estonian University of Life Sciences, 1 Kreutzwaldi Street, 51014 Tartu, Estonia.
| | | | | | | | | | | |
Collapse
|
29
|
Karise R, Viik E, Mänd M. Impact of alpha-cypermethrin on honey bees foraging on spring oilseed rape (Brassica napus) flowers in field conditions. Pest Manag Sci 2007; 63:1085-9. [PMID: 17879978 DOI: 10.1002/ps.1445] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
BACKGROUND Cruciferous oil-bearing crops have gained in importance worldwide. The expansion of the growing area of these crops has caused a proliferation of pests. Exposure to organophosphate, carbamate and pyrethroid insecticides has been associated with bee poisoning in food crops. This study examines the repellent effect of alpha-cypermethrin on the number of foraging honey bees, Apis mellifera L., on fields of spring oilseed rape, Brassica napus L. var. oleifera. RESULTS The first experiment was conducted on differently sprayed 10 m(2) experimental plots where alpha-cypermethrin was applied at different times. Another experiment was conducted on a 4 ha seed production field divided into two parts: one part was treated with alpha-cypermethrin and the other was not treated with this insecticide. The results show that there was no difference in the number of honey bees between alpha-cypermethrin-treated and untreated patches. The result persisted through three observation years, regardless of varying flower and honey bee densities. CONCLUSION No repellent effect of the insecticide on honey bees was found even 24 h after spraying. The density of oilseed rape flowers most likely played a major role in choosing the foraging area.
Collapse
Affiliation(s)
- Reet Karise
- Institute of Agricultural and Environmental Sciences, Estonian Agricultural University, Kreutzwaldi 1, 51014, Tartu, Estonia.
| | | | | |
Collapse
|
30
|
Milius M, Merivee E, Williams I, Luik A, Mänd M, Must A. A new method for electrophysiological identification of antennal pH receptor cells in ground beetles: the example of Pterostichus aethiops (Panzer, 1796) (Coleoptera, Carabidae). J Insect Physiol 2006; 52:960-7. [PMID: 16911814 DOI: 10.1016/j.jinsphys.2006.06.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2006] [Revised: 06/02/2006] [Accepted: 06/07/2006] [Indexed: 05/11/2023]
Abstract
The responses of antennal taste sensilla of the ground beetle Pterostichus aethiops to 100mM Na(+)-salts and their mixtures with 1 and 10mM NaOH were compared. An increase in pH by 0.3-0.6 units in 100mM Na(+)-salt solutions, caused by the content of 1mM NaOH, was too small, except for alkaline Na(2)HPO(4), to influence the firing rate of the cation cell and pH cell significantly. However, different sensitivity of the two cells to increased pH was clearly demonstrated when the concentration of NaOH in 100mM stimulating salt solutions was increased to 10mM. Increasing pH by 1.2-2 units caused the 1st s firing rate to increase by 140-1050% and 0-26% in the pH cell and cation cell, respectively. Compared to the buffer series method used for identification of the pH receptors in ground beetles earlier, considerably stronger responses of the pH cell to a similar increase in pH were observed when the NaOH method was used for testing. At the same time, undesirable changes in salt ions concentration that occur when stimulating solutions differing by 1-2 pH units are prepared were much smaller using the latter method. Behavioural and ecological relevance of the results is discussed.
Collapse
Affiliation(s)
- Marit Milius
- Estonian University of Life Sciences, Institute of Agricultural and Environmental Sciences, 64 Kreutzwaldi Street, 51014 Tartu, Estonia
| | | | | | | | | | | |
Collapse
|
31
|
Must A, Merivee E, Luik A, Mänd M, Heidemaa M. Responses of antennal campaniform sensilla to rapid temperature changes in ground beetles of the tribe platynini with different habitat preferences and daily activity rhythms. J Insect Physiol 2006; 52:506-13. [PMID: 16527304 DOI: 10.1016/j.jinsphys.2006.01.010] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2005] [Revised: 01/25/2006] [Accepted: 01/25/2006] [Indexed: 05/07/2023]
Abstract
Responses of temperature sensitive (cold) cells from the antenna of ground beetles (tribe Platynini) were compared in species with different ecological preferences and daily activity rhythms. Action potential rates were characterized at various temperatures (ranges 23-39 degrees C) and during rapid changes in it (Deltat=0.5-15 degrees C). The stationary firing frequencies were nearly twice as high in eurythermic open field ground beetles Agonum muelleri and Anchomenus dorsalis (firing rates ranging from 22 to 47imp/s) than in a stenothermic forest species Platynus assimilis. In the eurythermic species, the firing rate did not significantly depend on temperature (Anchomenus dorsalis range of 23-27 degrees C and Agonum muelleri range of 23-33 degrees C) but plots of firing rate versus temperature showed rapid declines when lethally high temperatures were approached. In contrast, a nearly linear decline of the firing rate/temperature curve was observed in Platynus assimilis. Responses to rapid temperature decreases were also considerably higher in eurythermic species. Both the peak frequency of the initial burst (maximum 420-650Hz) as well as the sustained discharge in the first 4s of the response were higher than in Platynus assimilis. Long silent periods, lasting up to several seconds, that occurred at the beginning of the response to rapid warming were significantly shorter in Agonum muelleri and Anchomenus dorsalis compared to Platynus assimilis. These findings suggest that the responses of thermoreceptors to temperature changes may be correlated with specific ecological preferences.
Collapse
Affiliation(s)
- Anne Must
- Estonian University of Life Sciences, Institute of Agricultural and Environmental Sciences, 64 Kreutzwaldi Street, 51014 Tartu, Estonia.
| | | | | | | | | |
Collapse
|
32
|
Merivee E, Renou M, Mänd M, Luik A, Heidemaa M, Ploomi A. Electrophysiological responses to salts from antennal chaetoid taste sensilla of the ground beetle Pterostichus aethiops. J Insect Physiol 2004; 50:1001-1013. [PMID: 15607503 DOI: 10.1016/j.jinsphys.2004.09.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2004] [Accepted: 09/02/2004] [Indexed: 05/24/2023]
Abstract
Antennal gustatory sensilla of the ground beetle Pterostichus aethiops (Pz., 1797) (Coleoptera, Carabidae) respond to salts, the three sensory cells, A-, B- and C-cells, producing action potentials that are distinguished by differences in their shape, amplitude, duration and polarity of spikes. The B-cell (salt cell) was highly sensitive to both ionic composition and concentration of the tested nine salt solutions showing phasic-tonic type of reaction with a pronounced phasic component. The stimulating effect was dominated by the cations involved, and in most cases, monovalent cations were more effective stimuli than divalent cations. Salt concentration/response relations were tested with NaCl at 1, 10, 100 and 1000 mmol l(-1): mean firing rates increased from 0.8 to 44 spikes per first second of the response, respectively. The pH value of the stimulating solutions also influenced the B-cell rate of firing. By contrast, the pH level of stimulus solutions influenced the A-cells' phasic-tonic response more than the ionic composition or concentration of these solutions. Compared to a standard 100 mmol l(-1) salt (NaCl) solution (pH 6.3), alkaline solutions of the salts NaCH3COO, Na2HPO4 and Na2B4O7 (pH 7.9, 8.5 and 9.3, respectively, all 100 mmol l(-1)) induced remarkably stronger responses in the A-cell. On the other hand, the reaction to an acid solution of NaH2PO4 (pH 4.5, 100 mmol l(-1)) was minimal. A-cell responses to neutral salts like NaCl, KCl, CaCl2, MgCl2 and C5H14NOCl (pH 6.1-6.5) varied largely in strength. Very low or no responses were observed with chlorides of divalent cations, CaCl2 and MgCl2, and choline chloride (C5H14NOCl), indicating that the ionic composition of the solutions also affected A-cell responses. Neural activity of the C-cell was not influenced by the salt solutions tested.
Collapse
Affiliation(s)
- Enno Merivee
- Estonian Agricultural University, Institute of Plant Protection, 64 Kreutzwaldi Street, 51014 Tartu, Estonia.
| | | | | | | | | | | |
Collapse
|