竹横锥大象对寄主及虫体挥发物的行为和触角电位反应

为了探明竹横锥大象Cyrtotrachelus buqueti Guerin-Meneville是否存在两性间的引诱作用，以及寄主植物慈竹Neosinocalamus affinis笋对两性行为的影响，采用Y型嗅觉仪测定了竹横锥大象雌、雄成虫对4种虫体及寄主挥发物不同处理（雌、雄成虫，慈竹笋与雌、雄成虫的复合体）的行为反应，测定了触角不同部位对雌雄成虫3种虫体的提取物（整体、鞘翅、后肠）及其与寄主植物挥发物质联合作用的触角电位反应（EAG）。结果表明：雌成虫挥发物对雄虫有较高的引诱活性，对雌虫有驱避作用；雄成虫挥发物对雌虫有一定的引诱作用。雌、雄成虫对虫体与竹笋复合体气味的行为和电生理反应均显著或极显著高于对相应虫体挥发物的反应。经EAG测定，触角各部位对虫体不同部位挥发物的EAG值差异明显，触角端部对虫体与植物挥发性物质的联合作用EAG反应差异极其显著（P＜0.01）。竹横锥大象对沾染雌雄成虫虫体提取物的玻璃棒有一定的兴奋表现，雌虫兴奋率为6.67%，雄虫为26.67%。结果提示，竹横锥大象种内存在信息素，雌虫释放的信息素对同类雄虫有很强的引诱作用，而雄虫所释放的信息素对同类雌虫有引诱作用，添加寄主植物能够增强两性间的引诱效果。

Behavioral and EAG responses of Cyrtotrachelus buqueti Guerin-Meneville (Coleoptera: Curculionidae) adults to host volatiles and their body extracts

To find whether there is attraction between the male and female of Cyrtotrachelus buqueti Guerin-Meneville and the influence of the host plant on the behavior of the male and female,Y-tube olfactometer was used to determine the behavioral reaction of adult female and male to the volatiles of their bodies and the host plant after different treatments,and the EAG responses of different portions of antenna of C.buqueti to different combinations of their bodies extracts (female and male) and the volatiles of th...