Behavioral Responses Determination of Hippodamia variegata (Goeze) to Volatiles from Rape Leaves

ZHANG Ren-fu;WANG Wei;LIU Hai-yang;YAO Ju;Key Laboratory of Integrated Pest Management in China North-western Oasis Crops,Ministry of Agriculture of the People's Republic of China/Research Institute of Plant Protection,Xinjiang Academy of Agricultural Sciences;Korla Field Scientific Station for Crops Integrated Pest Managementof Ministry of Agriculture of the People's Republic of China;

rape volatiles;;Hippodamia variegate(Goeze);;Y-tube olfactometer;;behavioral responses

【Objective】This research aims to clarify the role of behavioral responses from volatiles rape to Hippodamia variegata(Goeze).【Method】The behavioral responses of the lady beetle adults to volatiles from rape were observed with a Y-tube olfactometer.Rape leaves were divided into three treatments:CK(intact leaves),aphid damage treatment and analog aphid damage treatment.In each treatment,100 and 500 aphids were respectively connected and rape leaves by the three treatments went through determination by two-two combination.【Result】When aphid damage treatment and analog aphid damage treatment were respectively determined against CK,the ratios were significantly higher than those of the CK.The more number of aphids,the more obvious the attraction would be.When determining the aphid injury treatment and analog aphid injury treatment,the difference between the two was not significant,but they were significantly higher than those without selection,which showed that rape leaves after treating aphids,whether they had aphids or not,could lure Hippodamia variegate(Goeze).【Conclusion】The experiments showed that aphid infested induced volatiles plays an important role in the behavioral responses of Hippodamia variegate(Goeze).