5%氯虫苯甲酰胺悬浮剂对小菜蛾的防效研究

Efficacy Study on 5% Prevathon SC against Plutella xylostella

为探讨5%氯虫苯甲酰胺悬浮剂对小菜蛾的防效,进行了田间试验,结果表明:5%氯虫苯甲酰胺悬浮剂对甘蓝小菜蛾有很好的防治效果,其中以5%氯虫苯甲酰胺悬浮剂1 000倍液防效最佳,药后3、7、10 d的防效分别为99.0%、97.4%、94.9%;5%氯虫苯甲酰胺悬浮剂1 500倍液防效其次,其药后3、7、10 d的防效分别为95.5%、92.6%、90.4%,明显优于对照农药。5%氯虫苯甲酰胺悬浮剂可作为吴江市防治小菜蛾的首选药剂。

To researeh the efficacy of 5% prevathon SC against Plutella xylostrlla,the feild experiment was conducted.The results showed that 5% prevathon SC had good control to Plutella xylostella,especially 5% prevathon SC 1 000 times solution had the best control effect,on the 3 rd,7 th and 10th days after treatment,its control efficacies were 99.0%,97.4% and 94.9%;5% prevathon SC 1 500 times solution’s efficacy was the next-best,after 3 rd,7 th and 10 th days,its control efficacies were 95.5%,92.6% and 90.4%.The two insecticides’ effect were obviously higher than the others’.So 5% prevathon SC can be used as the preferred insecticide to control Plutella xylostella in Wujiang city.