Study on Behavioral Responses of Asecodes hispinarum to Four Palm Plants Volatiles

SONG Xiao-jun et al(Key Laboratory of Monitoring and Controlling of Tropical Agricultural and Forest,Pests Invasion,Ministry of Agriculture,Environment and Plant Protection Institute,Chinese Academy of Tropical Agricultural Sciences,Danzhou,Hainan 571737)

Palm plant volatiles;Brontispa longissimat;Asecodes hispinarum;Behavioral responses

[Objective] The article aimed to elucidate the attracting effects of the four palm plants volatiles to Asecodes hispinarum.[Method] The behavioral response of A.hispinarum females to the volatiles emitted from 4 palm plants(Cocos nucifera,Roystonea regia,Areca catechu and Chrysalidocarpus lutescens) were studied by using a Y-tube olfactometer.[Result]The volatiles emitted from undamaged and mechanically damaged heart leaves of 4 palm plants had not attraction to A.hispinarum;the attraction of volatiles from 3L-Cocos nucifera,3L-Areca catechu and 3L-Chrysalidocarpus lutescens complexes to A.hispinarum females were only evident between 20 h and 48 h after infestation by 10 B.longissima 3th larvae per leaf,but not before or after.The volatiles from 3L-Roystonea regia complexes had evident abstraction at 36 h and 48 h,but not at other time.The behavioral responses of the female parasitoids to different larvae-plam complexes were not evident at 48 h;in contrast,parasitoids preferred the volatiles from 3L-Cocos nucifera.[Conclusion] The volatiles from heart leaves of host plants damaged by the larvae of B.longissima could attract A.hispinarum to locate to the host habitat.