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菜蚜Brevicoryn brassicae在世界许多国家和地区是蔬菜上的重要害虫,而菜蚜茧蜂Diaeretiella rapae是它的一种最主要的寄生蜂。抗蚜威被认为是一种对天敌较安全的选择性农药。Gu&Waage的研究结果表明,田间施用的抗蚜威的浓度是菜蚜茧蜂的亚致死剂量。本文通过在田间施用抗蚜威,研究农药的亚致死剂量对蚜茧蜂搜索行为及其在搜索区数量的影响,同时对菜蚜茧蜂的重寄生蜂Alloxystabrassicae对农药的反应也作了初步的探索。
Vegetable aphid Brevicoryn brassicae is a major pest on vegetables in many countries of the world, while Diaeretiella rapae is one of its major parasitic wasps. Pirimicarb is considered as a more selective insecticide to natural enemies. The results of Gu & Waage’s research indicate that the concentration of pirimicarb applied in the field is the sublethal dose of the parasitoid aphid. In this paper, the application of pirimicarb in the field to study the sub-lethal dose of pesticides on the search behavior of Aphidius benthos and its impact on the number of search areas, and the response of the parasitoid Alloxystabrassicae explore.