粘虫雄蛾触角对其性信息素的电生理反应

用自行组装的触角电位仪，测定了粘虫Mythimna separata雄蛾蛾龄对标准化合物顺-11-十六碳烯醛(Z11-16：A1d)、顺-9-十六碳烯醛(Z9-16:Ald)和十六碳醛(16：A1d)的EAG反应的影响，分析了雄蛾触角对3种标准化合物的剂量-反应关系，发现粘虫雄蛾对Zll-16，Ald和Z9-16：Ald的剂量-反应曲线呈现出典型的“S”型，并且反应阐值较低。而对16：A1d几乎没有反应。最为重要的是检测了粘虫雄蛾对雌蛾腺体提取物的EAG反应，反应值的大小与样品中所提取的雌蛾腺体数目成正比。通过检测粘虫雄蛾对羽化不同天数，以及同一天羽化、在暗期不同时辰提取的雌蛾腺体提取物的EAG反应，证实了粘虫雄蛾的反应曲线与雌蛾释放性信息素的时辰节律呈正相关。还比较了烟青虫和粘虫雄蛾对粘虫雌蛾腺体提取物的EAG反应，间接证实了粘虫雌蛾腺体提取物中可能含有次要组分Z9-16；A1d。

ELECTROANTENNOGRAM OF ORIENTAL ARMYWORM MYTHIMNA SEPARATA WALKER EXPOSED TO SEX PHEROMONE

Electroantennograms (EAGs) were obtained for Mythimna separataWalker exposed to the compounds (Z)-1 1-hexadecenal (Z11-16: Ald), (Z)-9-hexadecenal (Z9-16 :Aid) and hexadecenal (16:Ald) as well as the female gland extracts. The EAG doseresponse curves were significantly different among the three compounds, it indicatedthat male moths had the highest peak response to Zl1-16 :Ald, and very low response to16:Aid. The male response profiles to the female gland extracts were increased by increasing the source concentration. And the maximum EAG response was consistent with the female calling period. A comparative study of the EAG responses between Mythimnaseparata and Helicoverpa assulta revealed that a minor sex pheromone component, zg16:Ald, probably existed in Mythirana separata female gland extracts.