中红侧沟茧蜂对棉花挥发性物质的触角电位反应

Electroantennal responses of a parasitoid (Microplitis mediator ) to cotton plant volatiles

中红侧沟茧蜂Microplitismediator (Haliday)是棉铃虫Helicoverpaamigera (H櫣ｂｎｅｒ)的主要寄生蜂之一。在寻找害虫的过程中 ,害虫的寄主植物释放出的气味起着至关重要的作用。本文测定了中红侧沟茧蜂雌蜂对棉花中 17种气味物质的触角电位反应 ,比较了雌雄茧蜂对 6种气味反应的差别 ,并且测定了雌蜂对 4种气味物质的剂量 反应。结果表明 ,在所测的气味物质中 ,中红侧沟茧蜂对脂肪族化合物的反应最强 ,对芳香族化合物的反应居中 ,而对萜类化合物的反应较弱。对所测的气味物质的反应 ,雌雄茧蜂之间的差异不显著。雌蜂对正己醛、苯乙酮、正壬醇的反应阈值为 2 5 μL ,对苯甲醛的反应阈值为 2 5 0 μL ,在所测的浓度范围内 ,对

Microplitis mediator is one of the key parasitoid wasps which attack cotton bollworm Helicoverpa amigera. The odors released from host plants serve vital roles in its host finding behavior. Electroantennograms were recorded from female Microplitis mediator to 17 cotton volatile compounds. The EAG differences between female and male wasps to 6 compounds were compared, and EAG dose response curves were also constructed for females to 4 compounds. Aliphatic compounds elicited the largest EAGs. Arom...