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Tobacco Science & Technology, 2011, 11, p. 76-78., ISSN.1002-0861

Orientation of Aphidius gifuensis ashemed to tobacco and prey combination affected by insecticides

1. Anqiu Branch of Shandong Weifang Tobacco Co. Ltd., Aniqiu 262100, Shandong, P.R. China; 2. Plant Protection College, Shandong Agricultural University, Taian 271000, Shandong, P.R. China

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.