Abstract: Electroantennogram (EAG) responses of female Helicoverpa armigera (Hübner) to the single or mixture of volatile components of the wheat blossom were examined. For single compound or mixture compounds, there were no significant differences between EAG responses of virgin females and mated females (P=0.05). But, when heptanal was added in different concentrations of 1×10⁵－5×10⁵(V/V) to the mixture of greenleaf volatile compounds, the respondence of the antenna of mated female of cotton bollworm to the mixture of compounds was significantly higher than that of the virgin female (P<0.05).

Key words: Helicoverpa armigera; female moths, host-plant volatile compounds, heptanal, electroantennogram