夏秋季节是蔬菜害虫危害最为严重的时期,传统蔬菜生产中,常以化学防治为主,但农药的多次使用,会使害虫抗药性增强,菜体农药残留量增多,难以达到无公害生产的目的。夏秋高温多雨季节,用防虫网覆盖栽培蔬菜,通过物理方法,隔离害虫,切断害虫迁入途径,不但能保 Summer and autumn is the most serious period of vegetable pests, traditional vegetable production, chemical control is often the main, but the repeated use of pesticides, insecticide resistance will increase, vegetable pesticide residues increased, it is difficult to achieve pollution-free production purpose. In summer and autumn with high temperature and rainy season, vegetables are covered with pest control net to isolate pests and cut off pests through physical methods, which not only can protect