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Loulou A, M’saad Guerfali M, Muller A, Bhat AH, Abolafia J, Machado RAR, Kallel S. Potential of Oscheius tipulae nematodes as biological control agents against Ceratitis capitata. PLoS One 2022; 17:e0269106. [PMID: 35671263 PMCID: PMC9200223 DOI: 10.1371/journal.pone.0269106] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Accepted: 05/13/2022] [Indexed: 11/18/2022] Open
Abstract
A survey to collect soil nematodes with potential to control Ceratitis
capitata flies was carried out in different locations in Tunisia.
Several nematode isolates were recovered, laboratory colonies were established,
and their taxonomic identities were determined based on molecular methods. Among
all the recovered nematode isolates, two of them, Oscheius
tipulae TC2 and OC2, were evaluated for their capacity to control
C. capitata flies and for their ability to
kill and reproduce on Galleria mellonella larvae. Our results
show a great potential of these two isolates as biocontrol agents as they kill
C. capitata eggs and pupae and interfere
with the metamorphosis of C. capitata larvae.
More specifically, TC2 and OC2 nematodes killed 39 and 31% of
C. capitata eggs, respectively, impaired the
metamorphosis of up to 77% and up to 67% of C.
capitata larvae, respectively, and killed up to 66% and up
to 58% of C. capitata pupae, respectively. The
efficacy of TC2 and OC2 nematodes was particularly high on C.
capitata pupae, and significant insect mortalities were
observed even at concentrations of 1 and 5 nematodes/pupae, respectively. We
also found that TC2 and OC2 nematodes efficiently kill and reproduce in
G. mellonella larvae, suggesting that
these insects could be used for mass-multiplication of these nematodes. These
results reveal the potential of O. tipulae to
complement integrated pest management programs against C.
capitata flies.
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Affiliation(s)
- Ameni Loulou
- Laboratory of Bio-aggressor and Integrated Protection in Agriculture,
Department of Plant health and Environment, National Agronomic Institute of
Tunisia, University of Carthage, Tunis, Tunisia
| | - Meriem M’saad Guerfali
- Laboratory of Biotechnology and Nuclear Technologies, National Center of
Nuclear Sciences and Technologies, Technopole Sidi Thabet, Ariana,
Tunisia
| | - Arthur Muller
- Faculty of Sciences, Experimental Biology Research Group, Institute of
Biology, University of Neuchâtel, Neuchâtel, Switzerland
| | - Aashaq Hussain Bhat
- Faculty of Sciences, Experimental Biology Research Group, Institute of
Biology, University of Neuchâtel, Neuchâtel, Switzerland
- Department of Zoology, Government Degree College, Kathua, Jammu, Jammu
and Kashmir, India
| | - Joaquín Abolafia
- Departamento de Biología Animal, Biología Vegetal y Ecología, Universidad
de Jaén, Jaén, Spain
| | - Ricardo A. R. Machado
- Faculty of Sciences, Experimental Biology Research Group, Institute of
Biology, University of Neuchâtel, Neuchâtel, Switzerland
- * E-mail: (RARM); (SK)
| | - Sadreddine Kallel
- Laboratory of Bio-aggressor and Integrated Protection in Agriculture,
Department of Plant health and Environment, National Agronomic Institute of
Tunisia, University of Carthage, Tunis, Tunisia
- * E-mail: (RARM); (SK)
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İnak E. Geographical distribution and origin of acetylcholinesterase mutations conferring acaricide resistance in Tetranychus urticae populations from Turkey. Exp Appl Acarol 2022; 86:49-59. [PMID: 34731389 DOI: 10.1007/s10493-021-00673-9] [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] [Received: 08/10/2021] [Accepted: 10/29/2021] [Indexed: 06/13/2023]
Abstract
Two-spotted spider mite, Tetranychus urticae Koch (Acari: Tetranychidae), is a cosmopolitan pest species that can feed on more than 1000 host plant species. Historically, organophosphate (OP) and carbamate insecticides have been used to control this extremely polyphagous pest. However, its ability to develop acaricide resistance rapidly has led to failure in control. Mutations in acetylcholinesterase gene (ace), the target-site of OP and carbamate insecticides, have been reported to be one of the major mechanisms underlying this developing resistance. In this study, mutations previously associated with resistance (G119S, A201S, T280A, G328A, F331W/Y) in ace have been screened in 37 T. urticae populations collected across Turkey. All mutations were found in various populations, except G119S. Almost all populations had F331W/Y mutation (being fixed in 32 populations), whereas only two populations harboured A201S mutation, but not fixed. On the other hand, more than half of the populations contained T280A and G328A mutations. In addition, the presence of same haplotypes in populations originating from distinct geographic locations and a wide variety of ace haplotypes might indicate multiple origins of F331W and F331Y mutations; however, this needs further investigation. The results of area-wide screening showed that ace mutations are widely distributed among T. urticae populations. Therefore, the use of this group of insecticides should be limited or only rotational use might be regarded as a resistance management tool due to its different mode of action from other main acaricide groups in T. urticae control across Turkey.
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Affiliation(s)
- Emre İnak
- Department of Plant Protection, Faculty of Agriculture, Ankara University, 06110, Diskapi, Ankara, Turkey.
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Alves TJS, Murcia-Meseguer A, Azpiazu C, Wanumen A, Wanderley-Teixeira V, Teixeira ÁAC, Ortiz A, Medina P. Side effects of a mixture of essential oils on Psyttalia concolor. Ecotoxicology 2020; 29:1358-1367. [PMID: 32851565 DOI: 10.1007/s10646-020-02258-5] [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] [Accepted: 07/20/2020] [Indexed: 06/11/2023]
Abstract
Integrated Pest Management programs do not always prioritize natural enemies when selecting control methods; too often these important pest reducing agents are negatively affected by the action of other methods in agroecosystems. The aim of this research was to evaluate side effects of a bioinsecticide, developed from the mixture of cedar (Cedrus atlantica), eucalyptus (Corymbia citriodora) and lemon grass (Cymbopogon citratus) essential oils (EOs), in a ratio of 1:1:1, on Psyttalia concolor (Szèpligeti) (Hymenoptera: Braconidae) which is a parasitoid of some pests of the Tephritidae family, as Ceratitis capitata. The LD50 of the EOs mixture for C. capitata females was 3.09 µl/g, whereas the LD50 for P. concolor females was 20.45 µl/g which suggests the natural enemy is more tolerant to the EOs mixture. P. concolor parasitized L3 larvae of C. capitata through a voile treated with the mixture of EOs at 1.8% without causing any deleterious effects neither on the percentage of attacked hosts nor on the emergence rate, whereas at the highest concentration tested, 4.8%, decreased both parameters during the 2 first days after treatment. Semi-field assays showed that mixture of EOs was harmless to P. concolor when released 4 h after treatment whereas killed 55 ± 3.9% males and 37.5 ± 1.6% females of C. capitata. The mixture of EOs used jointly with lambda-cyhalothrin or kaolin, both compounds applied against C. capitata in conventional and organic farming, respectively, did not increase the toxicity and/or persistence against the pest.
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Affiliation(s)
- Thiago J S Alves
- Departamento de Agronomia-Entomologia, Universidade Federal Rural de Pernambuco, Av. Dom Manoel de Medeiros s/n, Dois Irmãos, Recife, PE, 52171-900, Brazil.
| | - Ana Murcia-Meseguer
- Unidad de Protección de Cultivos, Departamento de Producción Agraria, Escuela Técnica Superior de Ingeniería Agronómica, Alimentaria y de Biosistemas, Universidad Politécnica de Madrid (UPM), Av. Puerta de Hierro, 2, 28040, Madrid, Spain
| | - Celeste Azpiazu
- Unidad de Protección de Cultivos, Departamento de Producción Agraria, Escuela Técnica Superior de Ingeniería Agronómica, Alimentaria y de Biosistemas, Universidad Politécnica de Madrid (UPM), Av. Puerta de Hierro, 2, 28040, Madrid, Spain
| | - Andrea Wanumen
- Unidad de Protección de Cultivos, Departamento de Producción Agraria, Escuela Técnica Superior de Ingeniería Agronómica, Alimentaria y de Biosistemas, Universidad Politécnica de Madrid (UPM), Av. Puerta de Hierro, 2, 28040, Madrid, Spain
| | - Valéria Wanderley-Teixeira
- Departamento de Morfologia e Fisiologia Animal, Universidade Federal Rural de Pernambuco, Av. Dom Manoel de Medeiros s/n, Dois Irmãos, Recife, PE, 52171-900, Brazil
| | - Álvaro A C Teixeira
- Departamento de Morfologia e Fisiologia Animal, Universidade Federal Rural de Pernambuco, Av. Dom Manoel de Medeiros s/n, Dois Irmãos, Recife, PE, 52171-900, Brazil
| | - Antonio Ortiz
- Departamento de Química Orgánica e Inorgánica, EPSL, Universidad de Jaén, 23700, Linares, Spain
| | - Pilar Medina
- Unidad de Protección de Cultivos, Departamento de Producción Agraria, Escuela Técnica Superior de Ingeniería Agronómica, Alimentaria y de Biosistemas, Universidad Politécnica de Madrid (UPM), Av. Puerta de Hierro, 2, 28040, Madrid, Spain
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Elaini R, Asadi R, Naish N, Koukidou M, Ahmed M. Evaluation of Rearing Parameters of a Self-Limiting Strain of the Mediterranean Fruit Fly, Ceratitis capitata (Diptera: Tephritidae). Insects 2020; 11:E663. [PMID: 32992468 DOI: 10.3390/insects11100663] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Revised: 09/22/2020] [Accepted: 09/23/2020] [Indexed: 11/17/2022]
Abstract
The Mediterranean fruit fly (medfly), Ceratitis capitata, is a significant pest of stone and pome fruit that causes considerable economic losses worldwide. Current control is primarily based on insecticides, which are often mixed with protein baits. Oxitec has developed a self-limiting medfly strain (OX3864A) that demonstrates conditional female-specific mortality in the early life stages. Sustained release of OX3864A males offers medfly control, which should lead to substantial economic benefits in area-wide programmes. In the current study, the optimum quantities of mature and immature stages of the strain are assessed under semi-mass production. Moreover, the rearing and quality control limitations related to the production of this strain are provided. The data here demonstrate that the egg hatch rate can reach >85% under optimum rearing conditions. However, this depends on the number of pupae loaded in a cage and their ages. The suggested pupal density ranges between 14,000 and 18,000 pupae per cage to provide optimum egg production. In parallel, the embryo densities of 1.25-1.5 mL/kg larval Tet+ diet are recommended for strain propagation, while embryo densities of 1.25-2.0 mL/kg larval Tet- diet are suggested for male-only pupal production.
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Lantero E, Matallanas B, Pascual S, Ochando MD, Callejas C. Phylogeography of Organophosphate Resistant ace Alleles in Spanish Olive Fruit Fly Populations: A Mediterranean Perspective in the Global Change Context. Insects 2020; 11:E396. [PMID: 32604835 DOI: 10.3390/insects11060396] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/30/2020] [Revised: 06/19/2020] [Accepted: 06/23/2020] [Indexed: 02/04/2023]
Abstract
The olive fruit fly (olf) Bactrocera oleae is the most damaging olive pest. The intensive use of organophosphates (OPs) to control it, led to an increase in resistance in field populations. This study assesses the presence and distribution of three mutations at the ace gene related to target site insensitivity to OPs in Spain. Samples from other Mediterranean countries were included as external references. Resistance-conferring alleles (from exons IV and VII of the ace gene) reached almost an 80% frequency in olf Spanish populations. In total, 62% of them were homozygous (RR/RR), this being more common in eastern mainland Spain. High frequencies of RR/RR individuals were also found in North Mediterranean samples. Conversely, in Tunisia, only sensitive alleles were detected. Finally, the exon X mutation ∆Q3 had an extremely low frequency in all samples. The high frequency of genotype RR/RR in Spain indicates high fitness in an agroecosystem treated with pesticides, in contrast to ∆Q3. At exon IV all flies carried the same haplotype for the allele conferring resistance. The sequence analysis at this exon suggests a unique origin and fast expansion of the resistant allele. These results provide evidence that OPs appropriate use is needed and prompt the search for alternative methods for olf pest control.
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Tabbabi A, Daaboub J, Laamari A, Cheikh RB, Feriani M, Boubaker C, Jha IB, Cheikh HB. Evaluation of resistance to temephos insecticide in Culex pipiens pipiens larvae collected from three districts of Tunisia. Afr Health Sci 2019; 19:1361-1367. [PMID: 31148962 PMCID: PMC6531957 DOI: 10.4314/ahs.v19i1.8] [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] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Background Mosquitoes are considered as the main groups of arthropods that cause nuisance and public health problems. Objectives Evaluation of resistance to temephos insecticide in Culex pipiens pipiens larvae collected from three districts of Tunisia. Methods Late third and early fourth instars larvae of Culex pipiens pipiens were collected in three localities of Northern and Southern Tunisia. Field collected populations were tested against temephos insecticide and compared to bioassays of a susceptible reference strain. The cross-resistance between temephos and propoxur, and the polymorphism of over-produced esterases and AChE 1 were investigated. Results Studied populations exhibited tolerance to temephos with low and high levels of resistance. The resistance ratio (RR50) values of temephos ranged from 1.34 to 114. Synergists and starch electrophoresis showed that the metabolic resistances were involved in the recorded resistance. Likewise, the resistant target site (acetyl cholinesterase: AChE 1) was responsible for the recorded resistance to temephos compound in Culex pipiens pipiens. Conclusion The low and high resistance recorded to temephos insecticides is particularly interesting, because it leaves a range of tools useable by vector control services. However, further studies are needed to determine its spread and anticipate vector control failure where these insecticides are used.
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Affiliation(s)
- Ahmed Tabbabi
- Laboratory of Genetics, Faculty of Medicine of Monastir, University of Monastir, Tunisia
- Department of Hygiene and Environmental Protection, Ministry of Public Health, Tunisia
| | - Jabeur Daaboub
- Laboratory of Genetics, Faculty of Medicine of Monastir, University of Monastir, Tunisia
- Department of Hygiene and Environmental Protection, Ministry of Public Health, Tunisia
| | - Ali Laamari
- Laboratory of Genetics, Faculty of Medicine of Monastir, University of Monastir, Tunisia
| | - Raja Ben Cheikh
- Laboratory of Genetics, Faculty of Medicine of Monastir, University of Monastir, Tunisia
| | - Mohamed Feriani
- Laboratory of Genetics, Faculty of Medicine of Monastir, University of Monastir, Tunisia
| | - Chokri Boubaker
- Laboratory of Genetics, Faculty of Medicine of Monastir, University of Monastir, Tunisia
| | - Ibtissem Ben Jha
- Laboratory of Genetics, Faculty of Medicine of Monastir, University of Monastir, Tunisia
| | - Hassen Ben Cheikh
- Laboratory of Genetics, Faculty of Medicine of Monastir, University of Monastir, Tunisia
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Erratum. Detection of the Acetylcholinesterase Insecticide Resistance Mutation (G328A) in Natural Populations of Ceratitis capitata. J Econ Entomol 2015; 108:2837. [PMID: 26662496 DOI: 10.1093/jee/tov267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
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