菜粉蝶,俗称菜白蝶、白粉蝶,幼虫称为菜青虫。属于鳞翅目粉蝶科。危害油菜的菜粉蝶在全国各地均有分布,除华南冬油菜区发生较轻之外,其他各产区都很严重。主要取食十字花科植株,偏嗜甘蓝型油菜和甘蓝类蔬菜。危害特点主要在油菜苗期危害。初孵幼虫先取食卵壳再食叶片。二龄以前的幼虫仅啃食叶肉,留下一层薄而透明的 Cabbage butterfly, commonly known as white butterfly, white butterfly, larvae known as cabbage caterpillar. Belong to Lepidoptera Pieridae. Cabbage butterfly damage to the rape have been distributed all over the country, with the exception of southern China rapeseed area occurred lighter, the other producing areas are very serious. Mainly eat cruciferous plants, partial to rapeseed and cabbage vegetables. Harm characteristics mainly in the rapeseed harm. The newly hatched larvae first eat eggshell and then eat leaves. Larvae of the second instar eaten only the mesophyll, leaving a thin, transparent layer