几种杀虫剂对烟蚜茧蜂搜索烟蚜行为的影响

摘要

利用Y形嗅觉仪观测了4种杀虫剂影响烟蚜茧蜂对烟叶及烟蚜复合体的选择行为.结果表明,在正常生长状况下,烟叶释放的挥发物对烟蚜茧蜂无明显引诱作用,而烟叶受到蚜虫为害后所释放的挥发性次生物质则对烟蚜茧蜂有明显的招引作用；在杀虫剂处理后,20％康福多、3％莫比郎乳油和40％氧乐果乳油会抑制烟蚜茧蜂的搜索行为,但氯氰菊酯则明显有利于烟蚜茧蜂寻找猎物行为.%The orientation of Aphidius gifuensis Ashemed to tobacco and prey combinations affected by insecticides was investigated with Y - tube olfactometer. The results showed that normal tobacco leaves did not produce plant volatiles attractive to A. Gifuensis, while after being injured by Myzus persicae, they produced herbivore - induced volatiles attractive to A. Gifuensis. Compared to the control, the four tested insecticides obviously affected the foraging behavior of A. Gifuensis. 20% confidor EC, 3% acetaniprid EC and omethoate 40% EC could inhibit, while cypermethrin obviously benefited the searching behavior of A. Gifuensis.