菜青虫是菜粉蝶（Ｐｉｅｒｉｓｒａｐａｅｌ．）幼虫，属鳞翅目，粉蝶科，是大白菜、甘兰等十字花科蔬菜重要害虫。在我国北方地区一年发生四代，以低龄幼虫在叶背取食，稍大后在叶面爆食，形成许多孔洞甚至只剩叶脉，严重影响蔬菜产量和品质。为克服长期使用化学农药带来... Pieris rapae Pierisrapael larvae, Lepidoptera, Pieridae, cabbage, cabbage and other cruciferous vegetables is an important pest. Four generations occur in the northern part of our country in one year. The young larvae feed on the leaf backs and burst on the leaf surface slightly later to form many holes or even veins, which seriously affect the yield and quality of vegetables. To overcome the long-term use of chemical pesticides brought ...