棉蚜、棉红蜘蛛及稻蓟马和麦蜘蛛分别为棉花、水稻和小麦的主要害虫。历年来,一般都普遍发生,作物受害面积大,损失严重。虽然国内防治这些虫害的药剂不少,但对这些药剂,有的害虫已产生了抗药性;有的使用成本高,影响推广使用;有的毒性大,使用不安全,还有的因六六六停用后缺少取代药剂配合。因 Cotton aphids, cotton spider mites, and rice thrips and wheat spiders are the major pests of cotton, rice and wheat, respectively. Over the years, it has generally occurred that the area of ​​crop damage is large and the losses are serious. Although there are quite a few domestic medicaments for preventing and controlling these pests, some pests have produced drug resistance to these medicaments; some have high use costs and have an impact on popularization and use; some are toxic and unsafe to use; Discontinued after the lack of alternative drugs with. because