1.8%阿维菌素和0.5%甲维盐对草原毛虫的防治效果

Control Effects of 1.8% Avermectins and 0.5% Emamectin Benzoate against Grassland Caterpillar(Gynaephora qinghaiensis)

[目的]探究2种生物杀虫剂对青海省草原毛虫的防治效果。[方法]采用茎叶常量喷雾施药方法,研究了1.8%阿维菌素和0.5%甲维盐对青海省草原毛虫的防治效果。[结果]选择在草原毛虫3龄期施药,1.8%阿维菌素和0.5%甲维盐的施用剂量均为150ml/hm2时的防治效果均达90%以上,与对照药剂1.2%苦.烟乳油喷施剂量300 ml/hm2的防治效果差异不显著,且对牧草和益虫安全。[结论]1.8%阿维菌素和0.5%甲维盐均适宜在青海省大面积防治草原毛虫中推广应用。

[Objective] The aim was to study the control effects of two biological insecticides against G.qinghaiensis in Qinghai Province.[Method] The full coverage spray method was used,and control effects of 1.8% avermectins and 0.5% emamectin benzoate against G.qinghaiensis in Qinghai Province were studied.[Result] 1.8% avermectins and 0.5% emamectin benzoate should be applied for the third instars of G.qinghaiensis,and control effects of the two biological insecticides at 150 ml/hm2 both reached more than 90% which had no significant difference with that of control agent at 300 ml/hm2.Besides,the two biological insecticides were safe to forage and beneficial insects.[Conclusion] 1.8% avermectins and 0.5% emamectin benzoate should be used to control G.qinghaiensis in Qinghai Province widely.