生物防治具有选择性强,不产生抗性,无残留,不杀伤自然天敌,不污染环境等优点,是无公害蔬菜生产的重要防治措施,目前以应用生物农药、抗生素为主。一、以虫治虫白菜、甘蓝、花椰菜等低矮型菜田可引进释放青蛙防治菜青虫、小菜蛾、棉铃虫等。温室内释放赤眼蜂防治菜青虫,释放丽蚜小蜂防治温室白粉虱。二、以菌治虫苏云金杆菌(Bt)是应用广泛的一种细 Biological control has the advantages of strong selectivity, no resistance, no residue, no natural enemy killing and no environmental pollution, and is an important prevention and control measure for pollution-free vegetable production. At present, biopesticide and antibiotic are the main applications. First, insects cabbage insects, cabbage, cauliflower and other low-type vegetable fields can be introduced to release the frog control cabbage caterpillar, diamondback moth, cotton bollworm and so on. Trichogramma was released in the greenhouse to prevent cabbage beetles and release the green aphid. Second, to bacteria governance Bacillus thuringiensis (Bt) is a widely used kind of fine