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本文利用昆虫触角电位技术记录了棉平突蚜茧峰Lysiphlebia japonica(Ashmead)(Hymenoptera:Aphidiidae)对棉花挥发性次生物质(标样和提取物)和棉蚜信息素(性信息素和报警激素)的触角电位反应,没有发现雌雄间触角电位对差异(P>0.05)。所有测试标样中,活性最强的化合物是庚醇、己醛、庚醛、苯甲醛和饱合的六碳到九碳的直链正醇;雌雄蚜茧蜂都对绿叶气味物质反应强烈,而萜烯类化合物引起的触角电位反应相对较弱,在所有测试的萜烯类物质中,只有香叶醇表现出较强的活性;棉蚜茧蜂对棉蚜信息素的反应较为强烈,而对四种植物提取物,以棉花提取物活性最强,黄瓜次之,丝瓜和南瓜之间没有明显差别而且反应最弱。浓度反应曲线表明绿叶气味物质的反应域值比萜烯类物质低。根据以上结果,我们得出如下结论:绿叶气味物质可能是寄生蜂寻找寄主的远距离化学线索,而大多数萜烯类则在近距离内发挥作用;棉蚜信息素可能是很强的引诱剂,能够吸引寄生蜂而使其更容易找到寄主;羽化前经历对成虫触角的反应敏感性有一定影响。
In this paper, the effects of volatile compounds (standard samples and extracts) and cotton aphid pheromones (sex pheromones and alarm hormones) on cotton aphid cocoon Lysiphlebia japonica (Ashmead) (Hymenoptera: Aphidiidae) ) Of the tentacles potential response, no difference was found between male and female tentacles potential (P> 0.05). Among all the test samples, the most active compounds were heptanol, hexanal, heptanal, benzaldehyde and saturated six-carbon to nine-carbon linear alcohols. Both male and female aphid responded strongly to green leaf odorant, However, the terpenoid-induced antenna potential response was relatively weak. Among all the tested terpenes, only geraniol showed a strong activity. The response of cotton aphid to the aphid pheromone was stronger Of the four plant extracts, cotton extract was the most active, followed by cucumber, sponge gourd and pumpkin no significant difference between and the weakest response. The concentration response curve shows that the green leaf odorant has a lower reaction range than the terpenes. Based on the above results, we conclude that green leaf odorant may be a long-range chemical clues to parasitoids looking for host, while most terpenes play a role in close range; cotton aphid pheromone may be a strong attractant , Can attract parasitoids to make it easier to find the host; experiencing the sensitivity of adult antennae before the tentacles have a certain impact.