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Yarsan E, Yilmaz F, Sevin S, Akdeniz G, Celebi B, Ozturk SH, Ayikol SN, Karatas U, Ese H, Fidan N, Agacdiken B, Babur C, Buldag M, Pehlivan S. Investigation of resistance against to flumethrin using against Varroa destructor in Türkiye. Vet Res Commun 2024; 48:1683-1696. [PMID: 38509424 PMCID: PMC11147911 DOI: 10.1007/s11259-024-10351-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2024] [Accepted: 03/07/2024] [Indexed: 03/22/2024]
Abstract
The honeybee ectoparasite Varroa destructor is a major threat to apiculture when evaluating bee diseases and pests. While attempting to control this mite, beekeepers often depend on a small selection of authorized synthetic acaricides, such as flumethrin, which is widely used in Türkiye and globally. However, resistance to flumethrin develops due to incorrect and excessive use. In this study conducted at Ordu Beekeeping Research Institute, trial group were established including an untreated control group and group where flumethrin-based pesticides were applied. Dead varroas collected from pollen traps and live varroas collected from bees were obtained from these trial groups for molecular analysis as positive-negative controls. Varroa samples were collected from provinces representing different regions with intensive beekeeping activities such as Adana, Ankara, Bingöl, Muğla, Ordu, Şanlıurfa, Tekirdağ. Molecular methods were employed to investigate the resistance gene region for pyrethroids (specifically flumethrin) against V. destructor. In our study, individual DNA extractions were performed on dead parasites from colonies subjected to pyrethroid application (resistance negative control) and live parasites (resistance positive control). The DNA samples obtained were used in PCR reactions targeting the region encoding the 925th amino acid of the voltage-gated sodium channel (VGSC) gene, which is responsible for resistance formation. The DNA samples were subjected to gel electrophoresis to observe the amplification products of the expected target region. To examine the nucleotide sequence changes that encode leucine at the 925th amino acid, which is associated with resistance, DNA sequence analysis was applied to the amplification products. Out of 332 V. destructor parasites obtained from different provinces, 279 were analysed using molecular methods. It was observed that 31% of the samples showed sensitivity to flumethrin while 69% exhibited resistance to it. Among the resistant samples: 27% had homozygous isoleucine mutation; 28% had homozygous valine mutation; 2.8% had heterozygous isoleucine mutation; 8.5% had heterozygous valine mutation; and 2.8% had heterozygous methionine mutation, all of which were associated with flumethrin resistance. As a result, the rate of flumethrin resistance in parasites varied between 51% and 94% among different provinces.
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Affiliation(s)
- Ender Yarsan
- Department of Pharmacology and Toxicology, Faculty of Veterinary Medicine, Ankara University, Ankara, 06100, Türkiye
| | | | - Sedat Sevin
- Department of Pharmacology and Toxicology, Faculty of Veterinary Medicine, Ankara University, Ankara, 06100, Türkiye.
| | - Gökhan Akdeniz
- Apiculture Research Center, Aegean Agricultural Research Institute, İzmir, Türkiye
| | - Bekir Celebi
- Microbiology Reference Laboratory Department, General Directorate of Public Health, Ministry of Health, Ankara, Türkiye
| | | | - Sultan Nurhan Ayikol
- Department of Pharmacology and Toxicology, Faculty of Veterinary Medicine, Ankara University, Ankara, 06100, Türkiye
| | | | - Hasan Ese
- Apiculture Research Institute, Ordu, Türkiye
| | - Nuri Fidan
- Food Control Laboratory Directorate, Giresun, Türkiye
| | - Bayram Agacdiken
- Ordu-Kabadüz District Directorate of Agriculture and Forestry, Ordu, Türkiye
| | - Cahit Babur
- Microbiology Reference Laboratory Department, General Directorate of Public Health, Ministry of Health, Ankara, Türkiye
| | | | - Sinem Pehlivan
- Department of Medical Pharmacology, Faculty of Medicine, Ankara Medipol University, Ankara, Türkiye
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Erdem E, Koç-İnak N, Rüstemoğlu M, İnak E. Geographical distribution of pyrethroid resistance mutations in Varroa destructor across Türkiye and a European overview. EXPERIMENTAL & APPLIED ACAROLOGY 2024; 92:309-321. [PMID: 38401013 PMCID: PMC11035437 DOI: 10.1007/s10493-023-00879-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Accepted: 12/29/2023] [Indexed: 02/26/2024]
Abstract
Varroa destructor Anderson & Trueman (Acari: Varroidae) is of paramount significance in modern beekeeping, with infestations presenting a primary challenge that directly influences colony health, productivity, and overall apicultural sustainability. In order to control this mite, many beekeepers rely on a limited number of approved synthetic acaricides, including the pyrethroids tau-fluvalinate, flumethrin and organophosphate coumaphos. However, the excessive use of these substances has led to the widespread development of resistance in various beekeeping areas globally. In the present study, the occurrence of resistance mutations in the voltage-gated sodium channel (VGSC) and acetylcholinesterase (AChE), the target-site of pyrethroids and coumaphos, respectively, was examined in Varroa populations collected throughout the southeastern and eastern Anatolia regions of Türkiye. All Varroa samples belonged to the Korean haplotype, and a very low genetic distance was observed based on cytochrome c oxidase subunit I (COI) gene sequences. No amino acid substitutions were determined at the key residues of AChE. On the other hand, three amino acid substitutions, (L925V/I/M), previously associated with pyrethroid resistance, were identified in nearly 80% of the Turkish populations. Importantly, L925M, the dominant mutation in the USA, was detected in Turkish Varroa populations for the first time. To gain a more comprehensive perspective, we conducted a systematic analysis of the distribution of pyrethroid resistance mutations across Europe, based on the previously reported data. Varroa populations from Mediterranean countries such as Türkiye, Spain, and Greece exhibited the highest frequency of resistance mutation. Revealing the occurrence and geographical distribution of pyrethroid resistance mutations in V. destructor populations across the country will enhance the development of more efficient strategies for mite management.
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Affiliation(s)
- Esengül Erdem
- Plant Protection Department, Faculty of Agriculture, Şırnak University, Şirnak, Turkey
| | - Nafiye Koç-İnak
- Department of Parasitology, Faculty of Veterinary Medicine, Ankara University, Altindag, 06070, Ankara, Turkey
| | - Mustafa Rüstemoğlu
- Plant Protection Department, Faculty of Agriculture, Şırnak University, Şirnak, Turkey
| | - Emre İnak
- Department of Plant Protection, Faculty of Agriculture, Ankara University, 06110, Ankara, Turkey.
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Smeele ZE, Baty JW, Lester PJ. Effects of Deformed Wing Virus-Targeting dsRNA on Viral Loads in Bees Parasitised and Non-Parasitised by Varroa destructor. Viruses 2023; 15:2259. [PMID: 38005935 PMCID: PMC10674661 DOI: 10.3390/v15112259] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2023] [Revised: 11/09/2023] [Accepted: 11/09/2023] [Indexed: 11/26/2023] Open
Abstract
The Varroa destructor mite is a devastating parasite of honey bees; however the negative effects of varroa parasitism are exacerbated by its role as an efficient vector of the honey bee pathogen, Deformed wing virus (DWV). While no direct treatment for DWV infection is available for beekeepers to use on their hives, RNA interference (RNAi) has been widely explored as a possible biopesticide approach for a range of pests and pathogens. This study tested the effectiveness of three DWV-specific dsRNA sequences to lower DWV loads and symptoms in honey bees reared from larvae in laboratory mini-hives containing bees and varroa. The effects of DWV-dsRNA treatment on bees parasitised and non-parasitised by varroa mites during development were investigated. Additionally, the impact of DWV-dsRNA on viral loads and gene expression in brood-parasitising mites was assessed using RNA-sequencing. Bees parasitised during development had significantly higher DWV levels compared to non-parasitised bees. However, DWV-dsRNA did not significantly reduce DWV loads or symptoms in mini-hive reared bees, possibly due to sequence divergence between the DWV variants present in bees and varroa and the specific DWV-dsRNA sequences used. Varroa mites from DWV-dsRNA treated mini-hives did not show evidence of an elevated RNAi response or significant difference in DWV levels. Overall, our findings show that RNAi is not always successful, and multiple factors including pathogen diversity and transmission route may impact its efficiency.
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Affiliation(s)
- Zoe E. Smeele
- School of Biological Sciences, Victoria University of Wellington, P.O. Box 600, Wellington 6140, New Zealand; (J.W.B.); (P.J.L.)
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Khajehali J, Poorjavad N, Bolandnazar A, Shahim-Germi F, Kimiaie M, Ardestani MM. Efficiency of plant-based acaricide gels compared to fluvalinate-impregnated strips for control of Varroa destructor in honey bee colonies. EXPERIMENTAL & APPLIED ACAROLOGY 2023; 91:57-67. [PMID: 37603256 DOI: 10.1007/s10493-023-00833-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Accepted: 08/10/2023] [Indexed: 08/22/2023]
Abstract
The Varroa mite is one of the most important pests of honey bee colonies. This study compares the efficiency of thymol-based acaricides with the tau-fluvalinate-based commercial treatment to control this mite species. Two experiments were conducted: (1) in the Fall, thymol-based gel was compared with a widely used acaricide, fluvalinate-impregnated strips (Apistan®), and (2) in the Spring, gels containing thymol-only, thymol + menthol + eucalyptus essential oil, and thymol + thyme essential oil were compared with fluvalinate-impregnated strips. In the first experiment, both treatments reduced Varroa mite infestation levels significantly after 70 days of their application compared to the control treatment. The results of the second experiment showed that thymol + thyme essential oil gel, thymol + menthol + eucalyptus essential oil gel, and Apistan strips had always higher efficiency on decreasing mite infestation levels of the selected colonies compared to the control treatment and thymol-only gel during their 7-week application. The results of this study demonstrate that plant-based acaricides for controlling Varroa mites in honey bee colonies have similar efficiency compared to the chemical control methods. Therefore, it is better to use these selected acaricides to reduce mite resistance to chemical control treatments in honey bee colonies.
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Affiliation(s)
- Jahangir Khajehali
- Department of Plant Protection, College of Agriculture, Isfahan University of Technology, Isfahan, 84156-83111, Iran.
| | - Nafiseh Poorjavad
- Department of Plant Protection, College of Agriculture, Isfahan University of Technology, Isfahan, 84156-83111, Iran
| | | | - Farid Shahim-Germi
- Department of Plant Protection, College of Agriculture, Isfahan University of Technology, Isfahan, 84156-83111, Iran
| | - Mahyar Kimiaie
- Department of Plant Protection, College of Agriculture, Isfahan University of Technology, Isfahan, 84156-83111, Iran
| | - Masoud M Ardestani
- Institute for Environmental Studies, Charles University in Prague, Benátská 2, Prague, CZ-12801, Czech Republic.
- Institute of Soil Biology and Biogeochemistry, Biology Centre of the Czech Academy of Sciences, Na Sádkách 7, České Budějovice, CZ-37005, Czech Republic.
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Schiavone A, Price DRG, Pugliese N, Burgess STG, Siddique I, Circella E, Nisbet AJ, Camarda A. Profiling of Dermanyssus gallinae genes involved in acaricide resistance. Vet Parasitol 2023; 319:109957. [PMID: 37207568 DOI: 10.1016/j.vetpar.2023.109957] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Revised: 05/11/2023] [Accepted: 05/13/2023] [Indexed: 05/21/2023]
Abstract
The poultry red mite (PRM), Dermanyssus gallinae, is a major threat for the poultry industry worldwide. Chemical compounds have been extensively used for PRM control, leading to selection of resistant mites. Molecular mechanisms of resistance have been investigated in arthropods, showing the role of target-site insensitivity and enhanced detoxification. Few studies are available about those mechanisms in D. gallinae, and none have yet focused on the expression levels of detoxification enzymes and other defense-related genes through RNA-seq. We tested PRM populations from Italy for their susceptibility to the acaricidal compounds phoxim and cypermethrin. Mutations in the voltage-gated sodium channel (vgsc) and in acetylcholinesterase (AChE) were investigated, detecting mutations known to be associated with acaricide/insecticide resistance in arthropods, including M827I and M918L/T in the vgsc and G119S in the AChE. RNA-seq analysis was performed to characterize metabolic resistance in fully susceptible PRM and in cypermethrin-resistant PRM exposed and unexposed to cypermethrin as well as phoxim resistant PRM exposed and unexposed to phoxim. Detoxification enzymes (including P450 monooxygenases and glutathione-S-transferases), ABC transporters and cuticular proteins were constitutively overexpressed in phoxim and cypermethrin resistant mites. In addition, heat shock proteins were found constitutively and inductively upregulated in phoxim resistant mites, while in cypermethrin resistant mites esterases and an aryl hydrocarbon receptor were constitutively highly expressed. The findings suggest that acaricide resistance in D. gallinae is due to both target-site insensitivity and overexpression of detoxification enzymes and other xenobiotic defense-related genes, which is mostly constitutive and not induced by treatment. Understanding the molecular basis of resistance could be useful to screen or test PRM populations in order to select targeted acaricides and to avoid the abuse/misuse of the few available compounds.
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Affiliation(s)
- Antonella Schiavone
- Department of Veterinary Medicine, University of Bari, Valenzano 70010, Italy.
| | - Daniel R G Price
- Moredun Research Institute, Pentlands Science Park, Edinburgh EH26 0PZ, United Kingdom
| | - Nicola Pugliese
- Department of Veterinary Medicine, University of Bari, Valenzano 70010, Italy
| | - Stewart T G Burgess
- Moredun Research Institute, Pentlands Science Park, Edinburgh EH26 0PZ, United Kingdom
| | - Ifra Siddique
- Department of Veterinary Medicine, University of Bari, Valenzano 70010, Italy
| | - Elena Circella
- Department of Veterinary Medicine, University of Bari, Valenzano 70010, Italy
| | - Alasdair J Nisbet
- Moredun Research Institute, Pentlands Science Park, Edinburgh EH26 0PZ, United Kingdom
| | - Antonio Camarda
- Department of Veterinary Medicine, University of Bari, Valenzano 70010, Italy
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Almecija G, Schimmerling M, Del Cont A, Poirot B, Duquesne V. Varroa destructor resistance to tau-fluvalinate: relationship between in vitro phenotypic test and VGSC L925V mutation. PEST MANAGEMENT SCIENCE 2022; 78:5097-5105. [PMID: 36103265 PMCID: PMC9826128 DOI: 10.1002/ps.7126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 08/03/2022] [Accepted: 08/13/2022] [Indexed: 06/15/2023]
Abstract
BACKGROUND Varroa destructor is a parasitic mite of the honey bee, Apis mellifera. Its presence in colonies can lead to a collapse within a few years. The use of acaricides has become essential to manage the hive infestation. However, the repeated and possibly incorrect use of acaricide treatments, as tau-fluvalinate, has led to the development of resistance. The in vitro phenotypic test allows the proportion of susceptible or resistant individuals to be known following an exposure to an active substance. In Varroa mites, resistance to tau-fluvalinate is associated with the presence of mutations at the position 925 of the voltage-gated sodium channel (VGSC). RESULTS Here, we compared the results obtained with an in vitro phenotypic test against tau-fluvalinate and those obtained with an allelic discrimination assay on 13 treated and untreated Varroa populations in France. The correlation between the phenotype and the genetic profile rate is found to be 0.89 Varroa mites having resistant phenotypic profile have a probability of 63% to present the L925V mutation (resistance detection reliability). However, 97% of the Varroa mites having the susceptible phenotype do not present the L925V mutation (susceptible detection reliability). CONCLUSION The L925V mutation explains most of the resistance to tau-fluvalinate in V. destructor in the populations tested. However, other mutations or types of resistance may also be involved to explain the survival of Varroa mites in the phenotypic test. © 2022 The Authors. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.
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Affiliation(s)
| | - Marion Schimmerling
- French Agency for Food, Environmental and Occupational Health and Safety (ANSES), Sophia Antipolis Laboratory, Bee Pathology UnitSophia AntipolisFrance
| | - Aurélie Del Cont
- French Agency for Food, Environmental and Occupational Health and Safety (ANSES), Sophia Antipolis Laboratory, Bee Pathology UnitSophia AntipolisFrance
| | - Benjamin Poirot
- Apinov, Scientific Beekeeping and Training CentreLagordFrance
| | - Véronique Duquesne
- French Agency for Food, Environmental and Occupational Health and Safety (ANSES), Sophia Antipolis Laboratory, Bee Pathology UnitSophia AntipolisFrance
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Trans-driven variation in expression is common among detoxification genes in the extreme generalist herbivore Tetranychus urticae. PLoS Genet 2022; 18:e1010333. [DOI: 10.1371/journal.pgen.1010333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Revised: 11/28/2022] [Accepted: 10/31/2022] [Indexed: 11/15/2022] Open
Abstract
The extreme adaptation potential of the generalist herbivore Tetranychus urticae (the two-spotted spider mite) to pesticides as well as diverse host plants has been associated with clade-specific gene expansions in known detoxifying enzyme families, and with extensive and rapid transcriptional responses. However, how this broad transcriptional potential is regulated remains largely unknown. Using a parental/F1 design in which four inbred strains were crossed to a common inbred strain, we assessed the genetic basis and inheritance of gene expression variation in T. urticae. Mirroring known phenotypic variation in the progenitor strains of the inbreds, we confirmed that the inbred strains we created were genetically distinct, varied markedly in pesticide resistance, and also captured variation in host plant fitness as is commonly observed in this species. By examining differences in gene expression between parents and allele-specific expression in F1s, we found that variation in RNA abundance was more often explained in trans as compared to cis, with the former associated with dominance in inheritance. Strikingly, in a gene ontology analysis, detoxification genes of the cytochrome P450 monooxygenase (CYP) family, as well as dioxygenases (DOGs) acquired from horizontal gene transfer from fungi, were specifically enriched at the extremes of trans-driven up- and downregulation. In particular, multiple CYPs and DOGs with broad substrate-specificities for pesticides or plant specialized compounds were exceptionally highly upregulated as a result of trans-regulatory variation, or in some cases synergism of cis and trans, in the most multi-pesticide resistant strains. Collectively, our findings highlight the potential importance of trans-driven expression variation in genes associated with xenobiotic metabolism and host plant use for rapid adaptation in T. urticae, and also suggests modular control of these genes, a regulatory architecture that might ameliorate negative pleiotropic effects.
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