【摘要】 为了筛选防治玉米草地贪夜蛾的最佳药剂，本文采用浸叶法测定了9杀虫剂对草地贪夜蛾的毒力。 结果表明，4%高氯·甲维盐ME防治草地贪夜蛾效果最好，LC₅₀值为0.571 mg/L，其次为25%喹硫磷EC、30%虫螨腈EC、40%丙溴磷EC、40%辛硫磷EC、20%甲氰菊酯EC、16%虫肼·茚虫威EC,LC₅₀值分别为6.436、13.693、30.565、34.704、38.657和72.084 mg/L，而5%多杀霉素SC和5%氟啶脲EC对草地贪夜蛾的毒性较低，LC₅₀值分别为137.417和267.232 mg/L。 综上所述，4%高氯·甲维盐ME和25% 喹硫磷EC是9种杀虫剂中防治草地贪夜蛾的最佳药剂， 两者均对草地贪夜蛾具有显著的防效。 该试验结果可为草地贪夜蛾防治中合理使用杀虫剂提供科学的理论依据。更多还原

【Abstract】 In order to screen the best insecticides for protecting corn from Spodoptera frugiperda, the control effects of 9types of insecticides on S. frugiperda were tested by leaf soaking method. The results showed that the control effect of 4%beta-cypermethrin·emamectin benzoate salt ME on S. frugiperda was the best with LC₅₀value of 0.571 mg/L, followed by25% quinalphos EC, 30% chlorfenapyr EC, 40% profenofos EC, 40% phoxim EC, 20% fenpropathrin EC and 16%tebufenozide · indazocarb EC. In detail, the LC₅₀values were 6.436, 13.693, 30.565, 34.704, 38.657 and 72.084 mg/L,respectively, while the lower LC₅₀values of 5% spinosad SC and 5% chlorfluazuron EC were 137.417 and 267.232 mg/L,respectively. In conclusion, 4% beta- cypermethrin·emamectin benzoate salt ME and 25% profenofos EC were the best among the 9 insecticides against S. frugiperda, both of which showed remarkable control effects. The results provided scientific theoretical basis for rational use of insecticides in S. frugiperda control.更多还原