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.