斜纹夜蛾是夏秋季蔬菜的主要害虫，由于其发生量大、食性杂、食量大，对蔬菜生产造成极大的危害。常用的药剂对斜纹夜蛾低龄幼虫防效较好，但高龄幼虫的抗药性却很强，为了筛选对斜纹夜蛾高龄幼虫有较高防效的低毒安全药剂，进行了不同药剂对斜纹夜蛾不同虫龄幼虫的室内和田间 Spodoptera litura is the main pest of vegetables in summer and autumn, because of its large amount, food complexity, food intake, causing great harm to vegetable production. Commonly used agents have a good control effect on the young larvae of Spodoptera litura, but the resistance of the older larvae is very strong. In order to screen the low-toxic safety agents which have higher anti-infective effects on the aged larvae of Spodoptera litura, Moth larvae of different instars indoors and in the field