花椰菜鳞翅目害虫安全用药技术试验初探

Primary Study on Safe Application Technology of Insecticides against Lepidopteran Insects in Cauliflower

为明确花椰菜上害虫安全用药技术,比较了多种药剂对斜纹夜蛾和菜青虫的药效。结果表明,在卵孵化高峰期喷雾施药,35%氯虫苯甲酰胺水分散粒剂5 800倍液、8 772倍液和12 500倍液、16 000IU/mg苏云金杆菌可湿性粉剂250倍液对害虫的速效性和持效性均较好,防效多达90%以上;6%乙基多杀菌素悬浮剂1 250倍液和2 500倍液防效可达80%左右:而0.5%苦参碱水剂125倍液、166.7倍液药效发挥较慢,应提早喷药或与速效性好的药剂混用。

In order to develop the safe application technology to control insect pests in cauliflower,the field efficacy of several insecticides against Spodoptera litura and Pieris rapae were compared at the hatching peak of the pests.The results showed that,chlorantraniliprole 30%WG diluted 5 800,8 772 and 12 500 times and Bacillus thuringiensis WP diluted 250 times both provided efficient control with quick-acting and persistent activity,and the control rate were higher than 90%.The field efficacy of Spinetoram SC diluted 1 250 and 2 500 times was nearly 80%,whereas the killing speed of matrine AS 0.5% diluted 125 and 166.7 times was so slow that it must be used in advance or together with the quick-acting insecticides.