蔬菜病虫害种类多,为害重,近十年来更趋严重。防治病虫害多以喷洒化学农药为主,使用品种又较单一,不讲究施药技术,促使病虫产生抗性,从而加大用药量,又使抗药性强的病虫后代得以繁衍出抗药性更强的后代,继而再加大用药量,致使蔬菜上的农药残留量增加。蔬菜食用时不经高温蒸煮,不少蔬菜还供生食,因此减少蔬菜上的农药使用量,提供无农药污染的“无公害”蔬菜(下简称“无公害”蔬菜)是迫切要解决的问题。无农药污染不是不用农药,而是蔬菜上农药残留量不超过国家或国际的规定标准。据不少省市抽样检测市场上 Vegetable pests and diseases many kinds, heavy damage, more serious over the past decade. Prevention and control of pests and diseases and more to spray chemical pesticides, the use of more single species, do not pay attention to the application of technology, to promote pest and disease resistance, thereby increasing the dosage, but also drug-resistant pests and descendants to multiply out more resistant Strong offspring, and then increase the amount of medication, resulting in increased pesticide residues on vegetables. Vegetables without high temperature cooking, many vegetables are also raw food, so reducing the amount of pesticides on vegetables, pesticide-free pollution-providing “pollution-free” vegetables (hereinafter referred to as “pollution-free” vegetables) is an urgent problem to be solved. No pesticide pollution is not without pesticides, but pesticide residues in vegetables does not exceed the national or international standards. According to many provinces and cities in the sample testing market