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[目的]评价5%高效氯氟氰菊酯·甲维盐EW对甘蓝甜菜夜蛾(Spodoptera exigua Hubner)的田间防治效果,为甜菜夜蛾的有效控制提供参考。[方法]通过田间小区试验设计方法,研究了5%高效氯氟氰菊酯.甲维盐EW对甘蓝甜菜夜蛾的防治效果,并评价了其对甘蓝生长和天敌昆虫的安全性。[结果]该药剂施药后2 d,有效成分6～9 g/hm2或药剂用量120～180 g/hm2对甘蓝甜菜夜蛾表现出较好的杀虫效果,施药后10 d仍具有良好防效;对甘蓝生长及天敌无不良影响。[结论]5%高效氯氟氰菊酯·甲维盐EW是防治甘蓝甜菜夜蛾的较好药剂,具有对作物生长安全、高效性和持效期长的特点;其适宜用量为750～900 kg/hm2,最适施药期在甜菜夜蛾卵孵化盛期至低龄幼虫高峰期。
[Objective] The research aimed to evaluate the field control effect of 5% lambda-cyhalothrin EWE on Spodoptera exigua Hubner and provide reference for the effective control of Spodoptera exigua Hubner. [Method] The control effect of 5% lambda-cyhalothrin EW-EW on Spodoptera exigua was studied by the method of field plot design and its safety to cabbage growth and natural enemy insects was evaluated. [Result] The pesticide showed good insecticidal effect on Beet armyworm 2 d after application, 6 ~ 9 g / hm2 of active ingredient or 120 ~ 180 g / hm2 of drug. Control effect; no adverse effects on cabbage growth and natural enemies. [Conclusion] 5% lambda-cyhalothrin and Emamectin benzoate EW is a good medicament for the control of Spodoptera exigua, and has the characteristics of safe, efficient and long-term growth for crops; the suitable dosage is 750-900 kg / hm2, and the optimum application period was during the period of hatching of egg beet armyworm to young larvae.