TDN混剂就是由6％三氯杀螨砜加6％三氯杀螨醇混合制成的可湿性粉剂,应用时兑水稀释成300倍液,即400ppm。这种混剂对华北和东北地区苹果上的山楂叶螨、苹果全爪螨效果很好。速效在90％左右;施药后15—30天效果稳定,残效高达97％以上,能控制苹果螨类危害。在福建、四川、浙江等 TDN mixture is composed of 6% tetracalcium sulfone and 6% dicofol mixed made of wettable powder, when diluted with water to 300 times, or 400ppm. This mixture on the North and Northeast apples on the Hawthorn spider mites, apple clippings mite good effect. Available at about 90%; 15-30 days after the application of the effect of stability, the residual effect of up to 97% or more, can control the harm of apple mites. In Fujian, Sichuan, Zhejiang and so on