不同杀虫剂对草地贪夜蛾的室内毒杀效果研究

Indoor Toxicity Effects of Different Insecticides Against Spodoptera frugiperda

为探索不同药剂对玉米草地贪夜蛾的室内毒杀效果,本试验采用浸叶法喂食3龄草地贪夜蛾带有6种药剂的叶片,分析48 h后各药剂对草地贪夜蛾的毒力测定结果和草地贪夜蛾在不同时间段的校正死亡率。结果表明,药剂处理48 h后,6种药剂毒力强弱排序为35%氯虫苯甲酰胺>10亿PIB/mL斜纹夜蛾核型多角体病毒>10%阿维菌素·除虫脲>10%溴氰虫酰胺>6%联苯菊酯·啶虫脒>2%阿维菌素·高效氯氰菊酯。10亿PIB/mL斜纹夜蛾核型多角体病毒悬浮剂1000 mg/L处理24 h后校正死亡率为83.33%,72 h后校正死亡率为100.00%;35%氯虫苯甲酰胺水分散粒剂100 mg/L处理24 h后草地贪夜蛾校正死亡率为6.67%,其他药剂处理24 h后草地贪夜蛾校正死亡率均为0%。

In order to explore the indoor toxicity effects of different insesticides against Spodoptera frugiperda,this experiment used the leaf soaking method to feed 3-year-old armyworm leaves with six insesticides.The toxicity effects of each insesticide against Spodoptera litura after 48 h and the corrected mortality rate of the armyworm at different time periods were analyzed.The results showed that after 48 h of treatment,the order of toxicity of the six insecticides was 35%chlorantraniliprole>1 billion PIB/mL Spodoptera litura nuclear polyhedrosis virus>10%abamectin·difenuron>10%cyananthramide>6%bifenthrin·acetamiprid>2%abamectin·beta-cypermethrin.After 24 h of treatment,the corrected mortality rate of Spodoptera frugiperda treated with 1 billion PIB/ml Spodoptera litura nuclear polyhedrosis virus SC 1000 mg/L was 83.33%;after 72 h of treatment,the corrected mortality rate of Spodoptera frugiperda was 100.00%.After 24 h of treatment,the corrected mortality rate of Spodoptera frugiperda treated with 35%chlorantraniliprole WG 100 mg/L was 6.67%,the corrected mortality rate of Spodoptera frugiperda treated with other insecticides were all 0%.