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为了发挥生物农药的作用,以弥补化学农药的某些不足之处,我们于1982年研制成苏云金杆菌乳剂(以下简称Bt乳剂),1982—1984年先后在湖北、河北、北京等15个省市,对菜青虫、玉米螟,杨小舟蛾、杨尺蠖等害虫进行防治试验和大面积示范,防治效果良好。一、Bt乳剂防治蔬菜害虫1983年在北京地区防治菜青虫、小菜蛾面积达5万多亩,河北、甘肃、山东、吉林、辽宁、河南、安徽、上海、南京、四川等地据不完全统计防治菜青虫总面积5万亩以上,防治效果均在90%以上。济南市、武汉市试验表明,Bt乳剂防治菜青虫的效果优于辛硫磷、敌敌畏。湖北、北京、济南等地以贮藏一年的Bt乳剂
In order to play the role of biological pesticides to make up for some of the deficiencies of chemical pesticides, we developed in 1982 Bacillus thuringiensis emulsion (hereinafter referred to as Bt emulsion), 1982-1984 successively in Hubei, Hebei, Beijing and other 15 provinces and cities , On Pieris rapae, corn borer, Yang Xiaotie moth, Yang Zhaobu and other pests for prevention and control experiments and large-scale demonstration of good control effect. First, the prevention and treatment of vegetable pests Bt emulsion In 1983 in Beijing in the prevention and treatment Pieris rapae, diamondback moth area of 50000 acres, Hebei, Gansu, Shandong, Jilin, Liaoning, Henan, Anhui, Shanghai, Nanjing, Sichuan and other places according to incomplete statistics Control cabbage caterpillar total area of more than 50000 acres, prevention and control effects are more than 90%. Jinan City, Wuhan test showed that Bt emulsion cabbage was better than phoxim, dichlorvos. Hubei, Beijing, Jinan and other places to store one year of Bt emulsion