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Li Q, Li W, Jin Z, Li J, Xue D, Tong Y, Zhang A, Du Y. Penicillium-Infected Apples Benefit Larval Development of Conogethes punctiferalis via Alterations of Their Gut Bacteria Community and Gene Expression. J Agric Food Chem 2024; 72:7774-7783. [PMID: 38563445 DOI: 10.1021/acs.jafc.3c09614] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
Pathogenic microorganisms can impact the behavior and physiology of herbivores by direct or indirect means. This study demonstrated that yellow peach moth Conogethes punctiferalis larvae feeding on Penicillium-infected apples exhibited significantly longer body length and weight parameters compared to the control group. The sequencing of gut 16S rRNA showed a significant increase in the diversity and abundance of bacteria in the larvae feeding on Penicillium-infected apples. Additionally, transcriptomic sequencing of the larval gut indicated significant upregulation of genes related to digestion and cuticle formation after consuming Penicillium-infected apples. Furthermore, enzyme activity assays revealed notable changes in the trypsin and lipase activity. Consequently, these alterations in gut microbiota structure, diversity, and gene expression levels may underlie the observed growth and developmental variations in C. punctiferalis larvae mediated by pathogenic microorganisms. This study holds theoretical significance for a deeper understanding of the tripartite interaction among microorganisms, insects, and plants as well as for the development of novel pest control measures based on gut microbiota.
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Affiliation(s)
- Qian Li
- College of Bioscience and Resource Environment/Key Laboratory of Urban Agriculture (North China), Ministry of Agriculture and Rural Affairs of the People's Republic of China, Beijing University of Agriculture, Beijing 100096, China
| | - Wanying Li
- College of Bioscience and Resource Environment/Key Laboratory of Urban Agriculture (North China), Ministry of Agriculture and Rural Affairs of the People's Republic of China, Beijing University of Agriculture, Beijing 100096, China
| | - Zhiying Jin
- College of Bioscience and Resource Environment/Key Laboratory of Urban Agriculture (North China), Ministry of Agriculture and Rural Affairs of the People's Republic of China, Beijing University of Agriculture, Beijing 100096, China
| | - Jiayu Li
- College of Bioscience and Resource Environment/Key Laboratory of Urban Agriculture (North China), Ministry of Agriculture and Rural Affairs of the People's Republic of China, Beijing University of Agriculture, Beijing 100096, China
| | - Dingrong Xue
- National Engineering Research Center of Grain Storage and Logistics, Academy of National Food and Strategic Reserves Administration, Beijing 100037, China
| | - Yue Tong
- College of Bioscience and Resource Environment/Key Laboratory of Urban Agriculture (North China), Ministry of Agriculture and Rural Affairs of the People's Republic of China, Beijing University of Agriculture, Beijing 100096, China
| | - Aihuan Zhang
- College of Bioscience and Resource Environment/Key Laboratory of Urban Agriculture (North China), Ministry of Agriculture and Rural Affairs of the People's Republic of China, Beijing University of Agriculture, Beijing 100096, China
| | - Yanli Du
- College of Bioscience and Resource Environment/Key Laboratory of Urban Agriculture (North China), Ministry of Agriculture and Rural Affairs of the People's Republic of China, Beijing University of Agriculture, Beijing 100096, China
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Lewis MT, Miller L, Hu M, Hamby KA. Diffuse Associations Between Drosophila suzukii and Filamentous Fungal Microbes May Alter Caneberry Disease Dynamics. Phytopathology 2024; 114:137-145. [PMID: 38318843 DOI: 10.1094/phyto-12-22-0470-r] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2024]
Abstract
Interactions between microorganisms and frugivorous insects can modulate fruit rot disease epidemiology. Insect feeding and/or oviposition wounds may create opportunities for fungal infection. Passive and active dispersal of fungal inoculums by adult insects also increases disease incidence. In fall-bearing raspberries and blackberries, such vectoring interactions could increase crop damage from the invasive pestiferous vinegar fly Drosophila suzukii (spotted-wing drosophila). Periods of peak D. suzukii activity are known to overlap with several species of primary fruit rot pathogen, particularly Botrytis cinerea and Cladosporium cladosporioides, and previous work indicates that larvae co-occur with and feed on various filamentous fungi at low rates. To further our understanding of the epidemiological consequences that may emerge from these associations, we surveyed the filamentous fungal community associated with adult D. suzukii, isolating and molecularly identifying fungi externally and internally (indicating feeding) from field-collected adults over 3 years. We isolated and identified 37 unique genera of fungi in total, including known raspberry pathogens. Most fungi were detected infrequently, and flies acquired and carried fungi externally at higher richness, frequency, and density relative to internally. In a worst-case scenario laboratory vectoring assay, D. suzukii adults were able to transfer B. cinerea and C. cladosporioides to sterile media at 0, 24, 48, and 72 h after exposure to sporulating cultures in Petri dishes. These results collectively suggest an adventitious vectoring association between D. suzukii and fruit rot fungi that has the potential to alter caneberry disease dynamics.
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Affiliation(s)
- Margaret T Lewis
- Department of Entomology, University of Maryland, College Park, MD 20742
| | - Logan Miller
- Department of Entomology, University of Maryland, College Park, MD 20742
| | - Mengjun Hu
- Department of Plant Sciences and Landscape Architecture, University of Maryland, College Park, MD 20742
| | - Kelly A Hamby
- Department of Entomology, University of Maryland, College Park, MD 20742
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Rering CC, Quadrel A, Urbaneja-Bernat P, Beck JJ, Ben-Zvi Y, Khodadadi F, Aćimović SG, Rodriguez-Saona C. Blueberries infected with the fungal pathogen Colletotrichum fioriniae release odors that repel Drosophila suzukii. Pest Manag Sci 2023; 79:4906-4920. [PMID: 37545181 DOI: 10.1002/ps.7692] [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] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Revised: 07/13/2023] [Accepted: 08/07/2023] [Indexed: 08/08/2023]
Abstract
BACKGROUND Spotted-wing drosophila, Drosophila suzukii, is a serious pest of thin-skinned fruits. Alternative methods to control this pest are needed to reduce insecticide use, including new repellents. Previous research demonstrated that D. suzukii adults use odor cues to avoid blueberries infected with the fungal pathogen Colletotrichum fioriniae, which causes the disease anthracnose. To identify novel D. suzukii repellents, we investigated the volatile emission from experimentally-infected fruit, which were inoculated with C. fioriniae isolates in the laboratory, and from field-collected fruit, which were naturally infected and harvested from a field. We then tested the pathogen-induced volatiles on D. suzukii adult behavior. RESULTS Volatile emission was similar between all five C. fioriniae strains, with good agreement between experimentally-infected and field-collected berries. In total, 14 volatiles were found to be more abundant in infected versus uninfected fruit headspace. In multiple-choice bioassays, nine of the 14 volatiles elicited repellency responses from adult D. suzukii. These nine volatiles were further evaluated in dual choice assays, where all nine reduced fly capture by 43-96% compared to the control. The most repellent compounds tested were the esters ethyl butanoate and ethyl (E)-but-2-enoate, which were more or equally repellent to the known D. suzukii repellents 1-octen-3-ol, geosmin, and 2-pentylfuran. Dose-response assays identified concentration-dependent effects on D. suzukii repellency and oviposition when applied individually and consistent aversion observed across doses of a 1:1 blend. CONCLUSION We report two repellents from C. fioriniae-infected blueberries that could be useful semiochemicals for the behavioral manipulation of D. suzukii in the field. © 2023 Society of Chemical Industry. This article has been contributed to by U.S. Government employees and their work is in the public domain in the USA.
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Affiliation(s)
- Caitlin C Rering
- Chemistry Research Unit, Center for Medical, Agricultural, and Veterinary Entomology, Agricultural Research Service, United States Department of Agriculture, Gainesville, FL, USA
| | - Amanda Quadrel
- Department of Entomology, Philip E. Marucci Center, Rutgers University, Chatsworth, NJ, USA
| | - Pablo Urbaneja-Bernat
- Institut de Recerca i Tecnologia Agroalimentàries (IRTA), Sustainable Plant Protection, Cabrils, Spain
| | - John J Beck
- Chemistry Research Unit, Center for Medical, Agricultural, and Veterinary Entomology, Agricultural Research Service, United States Department of Agriculture, Gainesville, FL, USA
| | - Yahel Ben-Zvi
- Department of Entomology, Philip E. Marucci Center, Rutgers University, Chatsworth, NJ, USA
| | - Fatemeh Khodadadi
- Department of Plant Pathology and Microbiology, University of California, Riverside, CA, USA
| | - Srđan G Aćimović
- Virginia Tech, School of Plant and Environmental Sciences, Alson H. Smith Jr. Agricultural Research and Extension Center, Winchester, VA, USA
| | - Cesar Rodriguez-Saona
- Department of Entomology, Philip E. Marucci Center, Rutgers University, Chatsworth, NJ, USA
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Jones R, Fountain MT, Andreani NA, Günther CS, Goddard MR. The relative abundances of yeasts attractive to Drosophila suzukii differ between fruit types and are greatest on raspberries. Sci Rep 2022; 12:10382. [PMID: 35725889 PMCID: PMC9209449 DOI: 10.1038/s41598-022-14275-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Accepted: 06/03/2022] [Indexed: 01/04/2023] Open
Abstract
Fungal metabolic volatiles attract Drosophila suzukii which oviposits in ripening fruits, but there are few data describing the fungal microbiomes of commercial fruits susceptible to this insect pest. We tested the hypothesis that fruit type and ripening stage have a significant effect on fruit surface fungal communities using DNA metabarcoding approaches and found strong support for differences in all three fungal community biodiversity metrics analysed (numbers, types, and abundances of taxa). There was an average fivefold greater difference in fungal communities between sites with different fruit types (strawberry, cherry, raspberry, and blueberry) than across fruit developmental stages, demonstrating site and/or fruit type is the greater factor defining fungal community assemblage. The addition of a fungal internal standard (Plectosphaerella cucumerina) showed cherry had relatively static fungal populations across ripening. Raspberry had a greater prevalence of Saccharomycetales yeasts attractive to D. suzukii, including Hanseniaspora uvarum, which aligns with reports that raspberry is among the fruits with greatest susceptibility and attraction to D. suzukii. Greater knowledge of how yeast communities change during fruit maturation and between species or sites may be valuable for developing methods to manipulate fruit microbiomes for use in integrated pest management strategies to control D. suzukii.
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Affiliation(s)
- Rory Jones
- School of Life Sciences, University of Lincoln, Lincoln, LN6 7DL, UK. .,NIAB EMR, New Road, East Malling, Kent, ME19 6BJ, UK.
| | | | - Nadia A Andreani
- School of Life Sciences, University of Lincoln, Lincoln, LN6 7DL, UK.,Max Planck Institute for Evolutionary Biology, Plön, Germany
| | - Catrin S Günther
- School of Life Sciences, University of Lincoln, Lincoln, LN6 7DL, UK.,The New Zealand Institute of Plant and Food Research Ltd, Ruakura Research Campus, Bisley Road, Hamilton, 3214, New Zealand
| | - Matthew R Goddard
- School of Life Sciences, University of Lincoln, Lincoln, LN6 7DL, UK.,The School of Biological Sciences, The University of Auckland, Auckland, New Zealand
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Cha DH, Roh GH, Hesler SP, Wallingford A, Stockton DG, Park SK, Loeb GM. 2-Pentylfuran: a novel repellent of Drosophila suzukii. Pest Manag Sci 2021; 77:1757-1764. [PMID: 33236507 DOI: 10.1002/ps.6196] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [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: 09/01/2020] [Revised: 11/02/2020] [Accepted: 11/24/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND Drosophila suzukii (Matsumura), spotted-wing drosophila (SWD), is a major invasive pest of soft-skinned fruits in North America and Europe. Although insecticides are currently the primary method of SWD control, it is imperative to develop alternative management approaches, such as behavioral control through the use of repellents and attractants. This study explores the repellent properties of 2-pentylfuran as an oviposition deterrent on raspberries. RESULTS 2-Pentylfuran was found to be aversive to SWD in laboratory multiple-choice tests. When co-released from a vial (loaded as neat compound) with a synthetic SWD lure, 2-pentylfuran reduced SWD attraction to the SWD lure by 98% and the effect appeared 17% stronger compared to 1-octen-3-ol, a known SWD repellent. Releasing 50% 2-pentylfuran mixed with mineral oil from a vial located near ripe raspberries resulted in 30% reduction in SWD oviposition in the field. In laboratory no-choice assays, 2-pentylfuran reduced SWD oviposition on raspberries above 2.5 mg h-1 with greater repellency achieved at higher release rates. A release rate of 10 mg h-1 from a polyethylene sachet reduced egg-laying on raspberries by 60% in a semifield cage choice experiment. In a field experiment using fruiting raspberry clusters, 14 mg h-1 release rate of 2-pentylfuran was effective at reducing SWD infestations by 56% compared to untreated plots. CONCLUSION 2-Pentylfuran acts as a repellent for SWD and can significantly reduce fruit infestations under field conditions and high SWD pressure. Given that 2-pentylfuran is a registered food additive and generally regarded as safe, 2-pentylfuran has a potential use in behavioral control strategies against SWD. Published 2020. This article is a U.S. Government work and is in the public domain in the USA.
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Affiliation(s)
- Dong H Cha
- USDA-ARS, Daniel K Inouye US Pacific Basin Agricultural Research Center, Hilo, HI, USA
| | - Gwang H Roh
- USDA-ARS, Daniel K Inouye US Pacific Basin Agricultural Research Center, Hilo, HI, USA
- Oak Ridge Institute for Science and Education, US Department of Energy, Oak Ridge, TN, USA
| | | | | | | | - Shinyoung K Park
- USDA-ARS, Daniel K Inouye US Pacific Basin Agricultural Research Center, Hilo, HI, USA
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Boucher M, Collins R, Hesler S, Cox K, Loeb G. The Effect of Erwinia amylovora Infection in Apple Saplings and Fruit on the Behavior of Delia platura (Diptera: Anthomyiidae). Environ Entomol 2021; 50:117-125. [PMID: 33290563 DOI: 10.1093/ee/nvaa153] [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: 07/15/2020] [Indexed: 06/12/2023]
Abstract
The Vector Manipulation Hypothesis (VMH) posits that phytopathogens develop strategies to enhance dissemination by mediating behavior change in insect vectors. The VMH is poorly studied in phytopathogenic bacteria, especially in systems with numerous, occasional vectors. Erwinia amylovora is a bacterial pathogen of pome fruit that produces a bacterial ooze and is mechanically vectored by insects after they feed on ooze. The blossom blight phase of the disease exhibits manipulation of honeybees, leading to enhanced transmission, but whether the same occurs during the shoot blight phase of the disease is unknown. The goal of this study was to evaluate the effect of E. amylovora on the behavior of Delia platura, a fly with a worldwide endemic presence that may transmit E. amylovora. We show that D. platura prefer infected, oozing fruit to uninfected fruit in choice tests and that preference subsides when bacterial ooze is removed from the infected fruit. Flies did not exhibit a preference between infected saplings and uninfected saplings. The volatiles of infected fruit did not attract D. platura, indicating that diseased fruit odor is not responsible for the observed preference for infected fruit. Flies did not differentiate between sapling odors until infected trees had died, at which point they preferred uninfected tree odors. This study supports previous hypotheses suggesting that E. amylovora takes advantage of existing plant-insect interactions, though it is not fully understood how significantly behavioral changes affect transmission. Additional pathosystems with occasional, nonspecific vectors should be studied to further understanding of the VMH.
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Affiliation(s)
- Matthew Boucher
- Department of Entomology, Cornell AgriTech, New York State Agricultural Experiment Station, Cornell University, Geneva, NY
| | - Rowan Collins
- Department of Entomology, Cornell AgriTech, New York State Agricultural Experiment Station, Cornell University, Geneva, NY
| | - Stephen Hesler
- Department of Entomology, Cornell AgriTech, New York State Agricultural Experiment Station, Cornell University, Geneva, NY
| | - Kerik Cox
- Section of Plant Pathology and Plant Microbe Biology, School of Integrated Plant Sciences, Cornell AgriTech, New York State Agricultural Experiment Station, Geneva, NY
| | - Greg Loeb
- Department of Entomology, Cornell AgriTech, New York State Agricultural Experiment Station, Cornell University, Geneva, NY
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Stockton DG, Wallingford AK, Cha DH, Loeb GM. Automated aerosol puffers effectively deliver 1-OCTEN-3-OL, an oviposition antagonist useful against spotted-wing drosophila. Pest Manag Sci 2021; 77:389-396. [PMID: 32738015 DOI: 10.1002/ps.6028] [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: 05/20/2020] [Revised: 07/10/2020] [Accepted: 08/01/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND Automated aerosol puffers releasing behaviorally active volatile organic compounds can deter insect pests in crops. During 2016, we tested the efficacy of aerosol puffer arrays emitting 1-octen-3-ol at reducing Drosophila suzukii oviposition in fall-bearing raspberries in Western New York State. During 2017, we compared the performance of aerosol puffers with a passive diffusion release method (vial dispensers), as well as puffer timing and placement within the field. RESULTS During 2016, we found that octenol application in the field via aerosol puffer systems resulted in a 20% decrease in D. suzukii oviposition compared to control plots. During 2017, we found that aerosol puffers releasing octenol were 42-55% more effective than vial dispensers at deterring oviposition. We also found that a discontinuous application of octenol during dawn and dusk was sufficient to deter D. suzukii oviposition equivalent to continuous applications throughout the day. Although we observed no differences in infestation depending on puffer placement, low fly populations at the time of the trial may have affected the data. CONCLUSIONS Our data indicate that automated aerosol puffer systems may reduce D. suzukii infestation to a greater extent than vial dispensers. If adopted, a discontinuous puffer release schedule may protect both economic and ecological interests by reducing the amount of material required to achieve efficacy. Further research on puffer placement is needed to determine whether perimeter applications are effective in larger scale field research and in combination with attractants as part of a push-pull management system.
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Affiliation(s)
| | | | - Dong H Cha
- USDA-ARS, Daniel K. Inouye U.S. Pacific Basin Agricultural Research Center, Hilo, HI, USA
| | - Gregory M Loeb
- Department of Entomology, Cornell AgriTech, Geneva, NY, USA
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Weißinger L, Arand K, Bieler E, Kassemeyer HH, Breuer M, Müller C. Physical and Chemical Traits of Grape Varieties Influence Drosophila suzukii Preferences and Performance. Front Plant Sci 2021; 12:664636. [PMID: 33968118 PMCID: PMC8098983 DOI: 10.3389/fpls.2021.664636] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Accepted: 03/24/2021] [Indexed: 05/12/2023]
Abstract
The cuticle-covered surface forms the interface between plant parts, including fruits, and their environment. The physical and chemical properties of fruit surfaces profoundly influence plant-frugivore interactions by shaping the susceptibility and suitability of the host for the attacker. Grapevine (Vitis vinifera, Vitaceae) serves as one of the various host plants of the spotted wing drosophila, Drosophila suzukii Matsumura (Diptera: Drosophilidae), which is invasive in several parts of the world and can cause major crop losses. The susceptibility of wine towards this pest species differs widely among varieties. The objective of our study was to identify physical and chemical traits of the berry surface that may explain the differences in susceptibility of five grape varieties to D. suzukii. Both preferences of adult D. suzukii and offspring performance on intact versus dewaxed (epicuticular wax layer mechanically removed) grape berries were investigated in dual-choice assays. Moreover, the morphology and chemical composition of cuticular waxes and cutin of the different varieties were analyzed. Bioassays revealed that the epicuticular wax layer of most tested grape varieties influenced the preference behavior of adult flies; even less susceptible varieties became more susceptible after removal of these waxes. In contrast, neither offspring performance nor berry skin firmness were affected by the epicuticular wax layer. The wax morphology and the composition of both epi- and intracuticular waxes differed pronouncedly, especially between more and less susceptible varieties, while cutin was dominated by ω-OH-9/10-epoxy-C18 acid and the amount was comparable among varieties within sampling time. Our results highlight the underestimated role of the epicuticular surface and cuticle integrity in grape susceptibility to D. suzukii.
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Affiliation(s)
- Lisa Weißinger
- Department of Chemical Ecology, Bielefeld University, Bielefeld, Germany
- Nano Imaging Lab, Swiss Nano Science Institute, University of Basel, Basel, Switzerland
| | - Katja Arand
- Julius-von-Sachs-Institute for Biosciences, University of Würzburg, Würzburg, Germany
- Bavarian State Institute for Viticulture and Horticulture, Veitshöchheim, Germany
| | - Evi Bieler
- Nano Imaging Lab, Swiss Nano Science Institute, University of Basel, Basel, Switzerland
| | | | - Michael Breuer
- State Institute of Viticulture and Enology (WBI), Freiburg im Breisgau, Germany
| | - Caroline Müller
- Department of Chemical Ecology, Bielefeld University, Bielefeld, Germany
- *Correspondence: Caroline Müller,
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Urbaneja-Bernat P, Waller T, Rodriguez-Saona C. Repellent, oviposition-deterrent, and insecticidal activity of the fungal pathogen Colletotrichum fioriniae on Drosophila suzukii (Diptera: Drosophilidae) in highbush blueberries. Sci Rep 2020; 10:14467. [PMID: 32879373 DOI: 10.1038/s41598-020-71341-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Accepted: 06/29/2020] [Indexed: 12/01/2022] Open
Abstract
Spotted-wing drosophila, Drosophila suzukii, and the anthracnose pathogen Colletotrichum fioriniae are an important insect pest and fungal disease of highbush blueberries, respectively, in the United States. However, whether C. fioriniae infection affects D. suzukii preference and performance remains unknown. Here, we conducted choice and no-choice studies to determine the repellent, oviposition-deterrent, and insecticidal effects of C. fioriniae on D. suzukii. In choice tests, blueberry fruit treated with anthracnose solutions containing spores from either field-collected infected fruit (‘fruit’) or a laboratory C. fioriniae culture (‘colony’) were less attractive to sexually mature D. suzukii females, but not males, than untreated fruit. The plant tissue (fruit or leaves) did not influence C. fioriniae repellency effects on D. suzukii. In no-choice tests, 55% fewer numbers of eggs were laid on, and 65% fewer adults emerged from, blueberry fruit treated with either the ‘fruit’ or ‘colony’ anthracnose solution than untreated fruit. Egg-to-adult D. suzukii survival was also 12% lower on C. fioriniae-infected fruit. No repellency or negative effects on survival were observed when C. fioriniae spores were filtered out of the solution. These findings will help efforts towards the discovery of microbial-derived repellent/oviposition-deterrent compounds that could be used in behavior-based management strategies for D. suzukii.
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