广西不同小菜蛾种群对印楝素和阿维菌素的敏感性研究  

Studies on the Sensitivity of Different Populations of Plutella xylostella(L) in Guangxi to Azadirachtin and Avermectin

作　　者：龙丽萍[1] 蔡健和[1] 覃建林[1] 

机构地区：[1]广西农业科学院植物保护研究所,南宁530007

出　　处：《中国农学通报》2005年第7期329-330,345,共3页Chinese Agricultural Science Bulletin

基　　金：广西青年科学基金项目"广西主要蔬菜主要害虫的抗药性监测"(桂科青0007016);广西农业科学院科技发展基金项目"增效剂对抗性小菜蛾的增效作用研究"(2002028);广西新世纪十百千人才工程项目"广西现代农业示范园区病虫害调查鉴定及无公害综合防治"(2001215)的部分内容。

摘　　要：室内浸叶法测定结果表明:广西不同小菜蛾种群对印楝素的敏感性差异较小,LC50值在0.07￣0.23mg/L之间,与敏感性最低的石埠种群相比,相对毒力指数为1￣3.29;对阿维菌素对的的敏感性差异较大,LC50值在2.08￣17.02mg/L之间,与敏感性最低的仁乡种群相比,相对毒力指数为1￣8.18。The result of laboratory testing showed that the P. xylostella (L) populations collected from different vegetable areas in Guangxi had little vioration in sensitivity to azadirachtin, the LC50 value were 0.07~0.23 mg/L, and the index of relative toxicity (IT) were 1~3.29 compared with the sensitive of Shibu population. But it produce different sensitive to avermectin by different populations collected from different vegetable areas in Guangxi Province, the LC50 value were 2.08~17.02 mg/L, and the index of relative toxicity (IT) were 1~8.18 compared with the sensitive of Renxiang population.

关 键 词：印楝素 小菜蛾 种群 阿维菌素 广西 相对毒力指数 敏感性差异 LC50值 测定结果 浸叶法 相比 

分 类 号：S436.3[农业科学—农业昆虫与害虫防治] TQ453.3[农业科学—植物保护]