菜青虫是小菜粉蝶的幼虫，其色绿，分布广，危害大，是十字花科蔬菜的重要害虫之一。菜青虫主食叶片，严重时叶片全部吃光。如钻入叶球，把叶球吃成蜂窝状，粪便堆积其中，致使叶球腐烂，不仅影响质量和产量，且饬口极易形成软腐病的流行。因此，及时防治十分重要。菜粉蝶产卵? Pieris rapae cabbage butterfly larvae, its color green, widely distributed, endangered, cruciferous vegetables is one of the important pests. Pieris rapae staple leaves, all the leaves in severe eating. Such as drilling into the leaves, the leaves eaten into a honeycomb, feces which piled up, resulting in leaf decay, not only affect the quality and yield, and the mouth is easy to form a soft rot epidemic. Therefore, timely prevention and control is very important. Cabbage butterfly spawning?