异色瓢虫二斑变种对猎物搜索行为研究

Study on Foraging of Harmonia axyridis ab.Bimaculata to Prey Odour Sources

采用生物测试法,观测了异色瓢虫二斑变种对不同寄主上蚜虫的定向和选择行为。结果表明:帖梗海棠、毛白杨、柳树在正常的生长状况下,不会产生引诱异色瓢虫的挥发性次生物质,在这些植物受到蚜虫危害以后,会释放出引诱异色瓢虫的挥发性次生物质;而紫藤在正常的生长状况下和蚜虫危害后,都会产生排斥异色瓢虫的化学物质。

The foraging of Harmonia axyridis ab. Bimaculata in different preys was investigated. The result showed that Chaenome speciosa, Populus tomentosa and Sslix matsudana did not produce volatiles for attracting Harmonia axyridis. After these plants were injured with the different aphids, the ladybirds were attracted by plant volatiles. Plant volatiles were released by Wistaria sinensi.repelled the ladybirds in any conditions.