苏云金杆菌（Ｂｔ）杀虫剂具有杀虫谱较广、无公害、对天敌和环境安全等优点，是当今世界上生产量最大、应用最为广泛的微生物杀虫剂。Ｂｔ杀虫剂在蔬菜、果树、烟草、粮食、棉花等作物上进行大面积推广应用，有效地控制了多种主要害虫的危害，成为多种作物害虫综合防治的... Bacillus thuringiensis (Bt) insecticide insecticide has a broad spectrum of insecticide, pollution-free, natural enemies and environmental safety advantages, is the world’s largest production, the most widely used microbial pesticides. Bt insecticide in vegetables, fruit trees, tobacco, grain, cotton and other crops on a large area to promote the application, effectively controlling a variety of major pests, as a variety of crop pest integrated control ...