一、菜青虫1.为害与发生菜青虫的成虫称菜粉蝶、菜白蝶。为害十字花科蔬菜的还有东方菜粉蝶、大菜粉蝶、褐脉粉蝶和斑粉蝶,但主要是菜粉蝶。菜青虫除为害十字花科作物外,还可为害其它蔬菜和作物,是一种分布很广的世界性害虫。菜青虫低龄期仅在叶背取食叶肉,随着虫龄的增大,蚕食 First, Pieris rapae 1. Harmful occurrence and occurrence Pieris adult insect cabbage butterfly, cabbage white butterfly. Damage cruciferous vegetables are oriental cabbage butterflies, big cabbage white butterfly, pollen butterfly and spot butterfly, but mainly cabbage butterfly. Cabbage caterpillar except cruciferous crops, but also harmful to other vegetables and crops, is a widely distributed worldwide pests. Pieris rapae only feeding on the leaves back in the lower leaves, with the increase of insect age, eroded