我国是一个产棉大国,近几年由于棉田害虫抗药性的增强,不但有机磷类对棉铃虫的防治效果明显下降,而且菊脂类农药在高抗地区对棉铃虫也失去了控制能力。南昌特种农药厂经过两年多的试验,终于研制成功一种高效、低毒、一喷双效的特种农药——28％乐果·甲氰菊酯乳油(双效灭虫净),在部分省市的不同地区、不同土壤、不同气候条件下进行了大面积示范试验,受到了农民及农技人员的高度评价,1994年6月通过技术 China is a large cotton producing country. In recent years, due to the enhanced resistance of pest insects in cotton fields, the control effects of organophosphorus on cotton bollworm decreased significantly, and the control of the cotton bollworm in the high resistance areas of chrysanthemum pesticides was also lost. Nanchang Special Pesticide Factory after more than two years of testing, and finally developed a highly efficient, low toxicity, a spray double effect of special pesticides - 28% dimethoate, fenpropathrin EC (double effect pest control net), in part Provinces and cities in different regions, different soils, under different climatic conditions conducted a large area demonstration test, by farmers and agricultural technicians spoke highly of, in June 1994 through technology