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评价大体积酵母干扰 RNA 诱捕器的诱捕和杀灭效果,以吸引和控制伊蚊。

Evaluation of large volume yeast interfering RNA lure-and-kill ovitraps for attraction and control of Aedes mosquitoes.

机构信息

Department of Medical and Molecular Genetics, Indiana University School of Medicine, South Bend, IN, U.S.A.

Eck Institute for Global Health, University of Notre Dame, Notre Dame, IN, U.S.A.

出版信息

Med Vet Entomol. 2021 Sep;35(3):361-370. doi: 10.1111/mve.12504. Epub 2020 Dec 30.

Abstract

Aedes mosquitoes (Diptera: Culicidae), principle vectors of several arboviruses, typically lay eggs in man-made water-filled containers located near human dwellings. Given the widespread emergence of insecticide resistance, stable and biofriendly alternatives for mosquito larviciding are needed. Laboratory studies have demonstrated that inactivated yeast interfering RNA tablets targeting key larval developmental genes can be used to facilitate effective larvicidal activity while also promoting selective gravid female oviposition behaviour. Here we examined the efficacy of transferring this technology toward development of lure-and-kill ovitraps targeting Aedes aegypti (L.) and Aedes albopictus (Skuse) female mosquitoes. Insectary, simulated field and semi-field experiments demonstrated that two mosquito-specific yeast interfering RNA pesticides induce high levels of mortality among larvae of both species in treated large volume containers. Small-scale field trials conducted in Trinidad, West Indies demonstrated that large volume ovitrap containers baited with inactivated yeast tablets lure significantly more gravid females than traps containing only water and were highly attractive to both A. aegypti and A. albopictus females. These studies indicate that development of biorational yeast interfering RNA-baited ovitraps may represent a new tool for control of Aedes mosquitoes, including deployment in existing lure-and-kill ovitrap technologies or traditional container larviciding programs.

摘要

伊蚊(双翅目:蚊科)是几种虫媒病毒的主要传播媒介,通常在人类住所附近的人造充水容器中产卵。鉴于杀虫剂抗性的广泛出现,需要稳定且对生物友好的替代方法来控制蚊虫幼虫。实验室研究表明,针对关键幼虫发育基因的灭活酵母干扰 RNA 片剂可用于促进有效的幼虫杀灭活性,同时促进有选择的孕雌蚊产卵行为。在这里,我们研究了将这项技术转移到开发针对埃及伊蚊(L.)和白纹伊蚊(Skuse)雌性蚊子的诱捕和杀灭诱卵器的效果。昆虫学、模拟野外和半野外实验表明,两种针对蚊子的酵母干扰 RNA 杀虫剂在处理的大容量容器中可使两种幼虫的死亡率都很高。在西印度特立尼达进行的小规模野外试验表明,用灭活酵母片诱捕的大容量诱卵器比仅含水的诱捕器吸引了更多的孕蚊,对埃及伊蚊和白纹伊蚊都有很高的吸引力。这些研究表明,开发基于生物合理性的酵母干扰 RNA 诱饵诱卵器可能是控制埃及伊蚊的一种新工具,包括在现有的诱捕和杀灭诱卵器技术或传统的容器幼虫防治计划中部署。

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