我国是化学农药生产和使用的大国,年均化学防治面积高达45亿亩次。作为最主要的病虫草害防治方法,它每年可为我国农业生产挽回大约35%￣60%的损失。然而,化学农药,特别是高毒化学农药的大量使用甚至滥用,不但直接威胁我国食品和环境安全,而且严重影响我国农产品的国际声誉。2002年1月,日本以2001年我国蔬菜有2.8%抽检 China is a large country in the production and use of chemical pesticides, with an average annual chemical control area of ​​up to 4.5 billion mu. As the most important pest and disease prevention and control method, it can save about 35% ~ 60% of the losses of agricultural production in China every year. However, the widespread use and even abuse of chemical pesticides, especially highly toxic chemical pesticides, not only directly threaten the food and environmental safety in our country, but also seriously affect the international reputation of China’s agricultural products. In January 2002, Japan sampled 2.8% of Chinese vegetables in 2001