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Mutations of voltage-gated sodium channel contribute to pyrethroid resistance in Panonychus citri

Insect Science 2024年第3期31卷 803-816页

作者： Deng Pan Qiu-Juan Luo Andrias O.O'Reilly Guo-Rui Yuan Jin-Jun Wang Wei Dou Key Laboratory of Entomology and Pest Control Engineering College of Plant ProtectionAcademy of Agricultural SciencesSouthwest UniversityChongqingChina Key Laboratory of Agricultural Biosafety and Green Production of Upper Yangtze River(Ministry of Education) Academy of Agricultural SciencesSouthwest UniversityChongqingChina School of Biological and Environmental Sciences Liverpool John Moores UniversityLiverpoolUK

Insecticide resistance in Panonychus citri is a major obstacle to mite control in citrus *** insecticides are continually used to control mites in China,although resistance to pyrethroids has evolved in some ***,the resistance to the pyrethroid fenpropathrin was investigated and 7 out of 8 field-collected populations of P citri exhibited a high level of resistance,ranging from 171-fold to 15391-fold higher than the susceptible(SS)comparison *** voltage-gated sodium channel(VGSC)mutations were identified in the tested populations:L1031V,F1747L,and *** sequencing was used to evaluate the frequency of these mutations in the 19 field populations.L1031V and F1751I were present in all populations at frequencies of 11.6%-82.1%and 0.5%-31.8%,respectively,whereas the F1747L mutation was only present in 12 populations from Chongqing,Sichuan,Guangxi,and Yunnan *** of these mutations singly or in combination into transgenic flies significantly increased their resistance to fenpropathrin and these flies also exhibited reduced mortality after exposure to the pyrethroids permethrin andβ-*** citri VGSC homology modeling and ligand docking indicate that F1747 and F1751 form direct binding contacts with pyrethroids,which are lost with mutation,whereas L1031 mutation may diminish pyrethroid effects through an allosteric ***,the results provide molecular markers for monitoring pest resistance to pyrethroids and offer new insights into the basis of pyrethroid actions on sodium channels.

关键词： amplicon sequencing kdr mutation molecular docking Panonychus citri pyrethroid resistance transgenic flies

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The Entomological Efficacy of Piperonyl Butoxide (PBO) Combined with a pyrethroid in Insecticide-Treated Nets for Malaria Prevention: A Village-Based Cohort Study Prior to Large-Scale Deployment of New Generation Mosquito Nets in Burkina Faso

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Advances in Entomology 2024年第3期12卷 224-248页

作者： Aristide S. Hien Samina Maiga Koama Bayili Adissa Y. Ouattara Dieudonné D. Soma Richard Bationo Georges Benson Meda Delphine O. Karama Tiecoura Camara Georges Anicet Ouedraogo Roch K. Dabiré Abdoulaye Diabaté Malaria and Neglected Tropical Disease Department Institut de Recherche en Sciences de la Sant (IRSS) Bobo-Dioulasso Burkina Faso Sciences and Techniques Department Institut du Developpement Rural Universit Nazi Boni Bobo-Dioulasso Burkina Faso Vector Control Department Permanent Secretariat for Malaria Elimination Ouagadougou Burkina Faso

The efficacy of insecticide-treated nets (ITNs) is increasingly compromised by the prevalence of malaria vectors resistant to pyrethroids. In response to this issue, a new generation of ITNs has been developed that incorporate synergistic components, such as piperonyl butoxide (PBO). The purpose of this study is to provide entomological evidence for the efficacy of a PBO-based ITN brand at the village level, serving as a basis for decision-making before large-scale net deployment. During the high malaria transmission period, ITNs were distributed in each group and vector sampling was conducted biweekly in selected households. Bionomic data were collected to assess the resistance of wild An. gambiae populations to various chemical insecticides. There was a significant disparity in total An. gambiae sl. collected between the ITN arms, the intervention arm (ITN arms), and the control arm (P = 0.003). An. coluzzi was identified as the predominant species in the study area, as confirmed by PCR analysis. Analysis of the blood-feeding inhibition rate revealed that 100% permethrin + PBO ITN exhibited significantly greater inhibition than 66.81% permethrin only ITN. According to the log-time probit regression analysis, permethrin exhibited a knockdown time of 256 min without synergists, while it decreased to 139 min (P = 0.001) when pre-exposed to PBO. The evidence from this trial supports the use of PBO ITNs over standard ITNs for pyrethroids to combat pyrethroid resistance and improve protection against malaria for both individuals and communities, particularly in areas with high pyrethroid resistance.

关键词： pyrethroid resistance Permethrin + PBO ITNs Permethrin ITN Bionomic Data Insecticide Susceptibility Data Burkina Faso

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德国油菜害虫对拟除虫菊酯的抗性(英文)

德国油菜害虫对拟除虫菊酯的抗性(英文)

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第十二届国际油菜大会

作者： Heimbach Udo Andreas Müller Thomas Thieme Institute for Plant Protection in Arable Crops and Grassland Federal Biological Research Centre for Agriculture and Forestry Messeweg 11/1238104 BraunschweigGermany Federal Biological Research Centre for Agriculture and Forestry Institute for Plant Protection in Arable Crops and Grassland 38104 Braunschweig Germany BTL Bio-Test Lab Sagerheide 18184 Sagerheide Germany

自六年前首次发现对拟除虫菊酯具有抗性的甲虫以来,抗拟除虫菊酯的花粉甲虫（Meligethes aeneus油菜露尾甲）已经在德国广泛分布。害虫抗性如此快速的增强和蔓延的原因是因为拟除虫菊酯是注册后唯一施用于油菜的杀虫剂。喷洒单一油菜杀... 详细信息

自六年前首次发现对拟除虫菊酯具有抗性的甲虫以来,抗拟除虫菊酯的花粉甲虫（Meligethes aeneus油菜露尾甲）已经在德国广泛分布。害虫抗性如此快速的增强和蔓延的原因是因为拟除虫菊酯是注册后唯一施用于油菜的杀虫剂。喷洒单一油菜杀虫剂使得甲虫对杀虫剂显得不敏感。与此同时,德国由于缺乏有效控制花粉甲虫的手段使得75%的地区大量出现抗拟除虫菊酯甲虫并导致了油菜大幅度减产。为此,我们介绍一种用于监测花粉甲虫抗性的程序。另外,通过对其它油菜害虫的监测,以便发现其它害虫种群是否也存在抗性。到目前为止,包含Ceuthorhynchus spp.,Dasyneura spp,和Phyllotreta spp等在内的几种其它害虫种群中没有检测到了明显的抗性反应。本文还介绍和讨论了实验室用来检测昆虫敏感性的方法。

关键词： Oil seed rape Brassica napus Meligethes aeneus pyrethroid resistance adult vial-test

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