24%螺虫乙酯SC对苹果瘤蚜的田间药效及持效期研究

Field Efficacy and Persistence Study of 24% Spirotetramat SC on Apple Leaf Curling Aphid( Myzusmalisutus)

[目的]了解24％螺虫乙酯SC对苹果瘤蚜的防治效果,为合理使用螺虫乙酯防控苹果瘤蚜提供理论依据.[方法]以3年生红富士果树为试材,研究24％螺虫乙酯悬浮剂对苹果瘤蚜的防效、用药剂量、持效期以及对苹果的安全性.[结果]24％螺虫乙酯悬浮剂5 000倍稀释液对苹果瘤蚜有较好的速效性和持效性,持效期达20d以上,药后15-21 d的防效达98％以上,显著高于2.5％溴氰菊酯乳油500倍稀释液和10％吡虫啉WP2 000倍稀释液的控制作用.[结论]24％螺虫己酯悬浮剂在苹果瘤蚜等蚜虫防治上具有较高的推广应用价值.

[ Objective ] Control effects of 24% Spirotetramat SC on apple leaf curling aphid were studied to provide theoretieal basis for using Spirotetramat to control the pest. [ Method ] The efficiency, dosage, persistent period and safety to apple of 24% Spirotetramat SC on apple leaf curling aphid were studied. [ Result] The 5 000 times diluent of 24% Spirotetramat SC had better quick result and outstanding persistence against apple leaf curling aphid, and the persistent period was more than 20 days, the control efficiency in 15 -21 days after spraying was more than 98%, which was significantly higher than 500 times diluent of 2.5% Deltamethrin EC and 2 000 times diluent of 10% Imidacloprid WP. [ Conclusion] Spirotetramat has higher application value in controlling the apple leaf curling aphid and others aphid.