1975年全国植保工作会议提出“预防为主,综合防治”的植保工怍方针之后,病虫防治工作取得了不少成绩,特别是在防治策略上开始有了转变,如对农药残毒性和农药对环境的污染及其影响,对天敌在农业生态系中的作用等,都逐步加深了认识。但是,目前不合理使用农药的现象仍普遍存在,对农药使用也还缺乏完善的法规和严格的执行 After the National Plant Protection Conference in 1975 put forward the policy of “prevention first, comprehensive prevention and cure”, the prevention and control of pests and diseases have achieved many achievements, especially in prevention and control strategies. For example, pesticide residues and pesticides Environmental pollution and its impact on natural enemies in the role of agricultural ecosystems, have gradually deepened their understanding. However, the current phenomenon of unreasonable use of pesticides is still widespread and there is still a lack of sound regulations and strict enforcement of pesticide use