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Mobility and Dispersal of Two Cosmopolitan Stored-Product Insects Are Adversely Affected by Long-Lasting Insecticide Netting in a Life Stage-Dependent Manner
Journal of Economic Entomology ( IF 2.2 ) Pub Date : 2020-05-15 , DOI: 10.1093/jee/toaa094
Rachel V Wilkins 1 , Kun Yan Zhu 1 , James F Campbell 2 , William R Morrison 2
Affiliation  

Abstract Tribolium castaneum (Herbst) (Coleoptera: Tenebrionidae) and Trogoderma variabile Ballion (Coleoptera: Dermestidae) are two stored-product insects that cause extensive damage to a variety of postharvest commodities. Long-lasting insecticide-incorporated netting (LLIN), commonly used to control vector-borne diseases in tropical regions, has only been recently studied in an agricultural setting.While prior research showed that LLIN was successful against stored-product beetles, little is known about differential susceptibility among stored-product insect life stages.The aim of this study was to evaluate LLIN efficacy against immature T. castaneum and T. variabile compared with adults. Movement and dispersal ability were evaluated after exposure to LLIN or an untreated, control netting. For the movement assay, video-tracking software recorded the postexposure effects of LLIN on distance traveled and velocity of the insects in 2-h trials. For the dispersal assay, insects were exposed to the netting then released into one end of a PVC pipe and allowed 48 h to disperse to a novel food patch located at the opposite end of the pipe. Our study found that movement and dispersal ability of T. variabile and T. castaneum are significantly reduced, often by multiple-fold, after LLIN exposure, with the larval stage of each species more tolerant to the insecticide netting than adults.These results indicate that LLIN is a promising tool for use in intercepting immigrating insects of different life stages in food facilities to protect stored products.

中文翻译:

两种世界性储藏产品昆虫的移动性和扩散性受到长效杀虫剂网的不利影响,其影响取决于生命阶段

摘要 Tribolium castaneum (Herbst) (Coleoptera: Tenebrionidae) 和 Trogoderma variabile Ballion (Coleoptera: Dermestidae) 是两种储藏产品的昆虫,对各种收获后商品造成广泛的破坏。长效含杀虫剂的蚊帐 (LLIN) 通常用于控制热带地区的病媒传播疾病,但最近才在农业环境中进行了研究。虽然先前的研究表明,LLIN 对贮藏甲虫是成功的,但鲜为人知关于储藏产品昆虫生命阶段之间的差异易感性。本研究的目的是评估 LLIN 与成虫相比对未成熟 T. castaneum 和 T. variabile 的功效。在暴露于 LLIN 或未经处理的控制网后评估运动和分散能力。对于运动测定,视频跟踪软件在 2 小时试验中记录了 LLIN 对昆虫行进距离和速度的暴露后影响。对于分散试验,昆虫暴露在网中,然后被释放到 PVC 管的一端,并允许 48 小时分散到位于管另一端的新食物补丁。我们的研究发现,在 LLIN 暴露后,T. variabile 和 T. castaneum 的运动和传播能力显着降低,通常是数倍,每个物种的幼虫期对杀虫网的耐受性比成虫更强。这些结果表明LLIN 是一种很有前途的工具,可用于拦截食品设施中不同生命阶段的迁徙昆虫,以保护储存的产品。对于分散试验,昆虫暴露在网中,然后被释放到 PVC 管的一端,并允许 48 小时分散到位于管另一端的新食物补丁。我们的研究发现,在 LLIN 暴露后,T. variabile 和 T. castaneum 的运动和传播能力显着降低,通常是数倍,每个物种的幼虫期对杀虫网的耐受性比成虫更强。这些结果表明LLIN 是一种很有前途的工具,可用于拦截食品设施中不同生命阶段的迁徙昆虫,以保护储存的产品。对于分散试验,昆虫暴露在网中,然后被释放到 PVC 管的一端,并允许 48 小时分散到位于管另一端的新食物补丁。我们的研究发现,在 LLIN 暴露后,T. variabile 和 T. castaneum 的运动和传播能力显着降低,通常是数倍,每个物种的幼虫期对杀虫网的耐受性比成虫更强。这些结果表明LLIN 是一种很有前途的工具,可用于拦截食品设施中不同生命阶段的迁徙昆虫,以保护储存的产品。
更新日期:2020-05-15
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