菜粉蝶（PierisrapaeL．）是十字花科蔬菜上的常发性害虫。幼虫食叶，轻则“破洞百出”，重则仅剩叶脉，既造成减产，又降低商品价值。为克服长期使用化学农药带来的害虫抗药性及环境污染等负面效应，笔者对生物农药烟碱防治菜青虫作了试验，现初报如下。1材料与方法1．1供试药 Pieris rapae L. is a common pest on cruciferous vegetables. Larvae eat leaves, ranging from “full of holes”, while the only remaining veins, both to reduce production, but also reduce the value of the commodity. To overcome the long-term use of chemical pesticides caused by pest resistance and environmental pollution and other negative effects, the author of the biological pesticide nicotine cabbage was tested, the first report is as follows. 1 Materials and Methods 1.1 for testing drugs