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近年来,苏云金杆菌(即B.t.)杀虫剂在世界范围内得到迅速发展,商品制剂的品种和产量迅速增加,防治面积和防治对象逐年扩大。在我省防治棉蛉虫、菜青虫等农业害虫上发挥了重要作用,预计今年全省使用量将超过500吨。但生物农药杀虫致死速度慢,一般要48小时左右,因而有人认为不如用化学农药好。为了最大限度地发挥苏云金杆菌在防治害虫中的作用,增加防治效果,提高杀虫速度,已成为生防科技工作者的重要研究内容。我省农科院植保所生防研究室,
In recent years, Bacillus thuringiensis (B.t.) insecticides have been rapidly developed in the world. The varieties and yields of commercial preparations have rapidly increased. The area of prevention and treatment and the target of prevention and treatment have been expanding year by year. In our province prevention and control of cotton insects, cabbage caterpillars and other agricultural pests played an important role, the province is expected to use more than 500 tons this year. However, insecticidal biological pesticides lethal slow, generally about 48 hours, so some people think it is better to use chemical pesticides. In order to maximize the role of Bacillus thuringiensis in the control of pests, increase the control effect and increase the insecticidal speed, it has become an important research content of biotechnology researchers. Sichuan Academy of Agricultural Sciences Institute for Bioconstitute of Biocontrol Research,