椰甲截脉姬小蜂对4种棕榈科植物挥发物的行为反应研究

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

[目的]阐明4种棕榈科植物挥发物对椰甲截脉姬小蜂的引诱作用。[方法]用“Y”型嗅觉仪观测了椰甲截脉姬小蜂雌蜂对4种棕榈科植物（椰子Cocos nucifera，大王椰子Roystonea regia，槟榔Areca catechu和散尾葵Chrysalidocarpus lutescens）的行为反应。结果14种棕榈科植物未受害心叶和机械损伤心叶挥发物对椰甲截脉姬小蜂没有明显的吸引作用；每叶10头椰心叶甲3龄幼虫为害20—48h，幼虫-散尾葵心叶复合体、幼虫-槟榔心叶复合体和幼虫-椰子心叶复合体对椰甲截脉姬小蜂有明显的吸引作用；幼虫-大王棕心叶复合体仅在36、48h对椰甲截脉姬小蜂有明显的吸引作用；小于或大于这些时间范围，4种复合体对椰甲截脉姬小蜂都没有明显的吸引作用；相比之下，椰甲截脉姬小蜂对幼虫-椰子心叶复合体的趋向率稍强于其他3种复合体，但对4种复合体的行为反应没有明显差别。结论 椰心叶甲幼虫为害寄主植物心叶后，诱导的植物挥发物可引起椰甲截脉姬小蜂的寄主栖境定向行为。

[ 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./ong/s- sima 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-plato 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.