Sublethal effect of Abamectin in the functional response of the predator Phytoseiulus persimilis (Athias-Henriot) on Tetranychus urticae (Koch) (Acari: Phytoseiidae, Tetranychidae)

Abstract The biological control used for the control of Tetranychus urticae (Koch) is the predator mite Phytoseiulus persimilis (Athias-Henriot). It is important to the know the effects of acaricides on the biological behavior the Abamectin on the functional response of P. persimilis. The functional response of the predator was of type II exposed to concentration of Abamectin, the functional response parameters: successful attack rate (a’), handling time (Th), search efficiency and the maximum predation theory (T/Th) were affected by the acaricide. The predator spends more time in persecute, dominate, consume and prepair it self to the next searching comparing with the proof subject an the predation ability was affected.

摘要：用于防治二斑叶螨（Tetranychus urticae Koch）的生物防治手段为捕食螨智利小植绥螨（Phytoseiulus persimilis Athias-Henriot）。明确杀螨剂对智利小植绥螨生物学行为的影响，尤其是阿维菌素（Abamectin）对其功能反应的作用，具有重要研究价值。暴露于阿维菌素浓度环境下的捕食螨，其功能反应类型为Ⅱ型；该杀螨剂同时对功能反应相关参数产生了显著影响，包括成功攻击率（successful attack rate, a’）、处理时间（handling time, Th）、搜寻效率以及理论最大捕食量（T/Th）。与对照个体相比，捕食螨在追击、掌控猎物、取食以及为下一次搜寻做好准备等环节所花费的时间更长，其捕食能力亦受到影响。