印楝素与鱼藤酮及其复配混剂对斜纹夜蛾的毒效研究  

Study on Toxicity of Azadirathtin and Rotenoid and Their Admixture Against Spodoptera Iitura F.

作　　者：朱家颖[1] 肖春[1] 柯贤江[1] 叶敏[1] 袁盛勇[1] 李正跃[1] 杨丽 陆进 朱文禄 

机构地区：[1]云南农业大学植物保护学院,云南昆明650201 [2]云南省蒙自县植检植保站,云南蒙自661100

出　　处：《云南农业大学学报》2006年第3期315-319,共5页Journal of Yunnan Agricultural University

基　　金：云南省科技重点攻关项目(2001NG57)

摘　　要：用印楝素和鱼藤酮及其复配混剂对斜纹夜蛾3龄幼虫进行毒力测定。结果表明,印楝素和鱼藤酮单剂的毒力作用为一种剂量依赖关系;其复配混剂的触杀最佳配比为2∶6,此时印楝素和鱼藤酮浓度分别为200μg/mL和100μg/mL,共毒系数为423.15;其复配混剂的拒食最佳配比为3∶5,此时AFC50为1.2 mg/L,发育抑制率达90%以上只需35 mg/L。The toxicity of azadirachtin and rotenone and their admixture against the 3rd-instar larvae of Spodoptera litura F. were conducted in laboratory. The results showed that azadirachtin and rotenone enhanced their toxicity with increase of the dosage. For the admixture, the optimum proportion for contact toxicity was 2：6 when azadirachitin and rotenone concentration was 200μg/ml, and 100 μg/mL respectively. On this condition the co-toxicity coefficient was up to 423.15. The admixture produced a maximum anti-feeding effect and the AFC50 was 1.2 mg/L when the admixture was blended with azadirachitin and rotenone at the ratio of 3： 5. The admixture at 35 mg/L could inhibit the larvae growth by more than 90%.

关 键 词：印楝素 鱼藤酮 斜纹夜蛾 复配 配比 

分 类 号：S476.8[农业科学—农业昆虫与害虫防治]