化学防治是农业有害生物防控最有效的措施,但是,化学防治在生产实践中存在很多问题。农民不能有效地选择药剂及使用量,导致防治效果不好或浪费农药;农药不科学混用导致农药投入量增加,有时会出现药害和农药对农产品的复合污染;药剂分子在靶标生物体上沉积率低导致农药流失严重、有 Chemical control is the most effective measure to prevent and control agricultural pests, however, chemical control has many problems in production practice. Peasants can not effectively select the amount of pesticide and its use, resulting in poor control effect or waste of pesticides; insecure mixing of pesticides leads to increased input of pesticides, sometimes resulting in compound pollution of pesticides and agricultural chemicals; deposition of drug molecules on target organisms Low rates lead to serious loss of pesticides, there