Orientation of Aphidius gifuensis Ashemed to Tobacco and Prey Combination Affected by Insecticides

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.