一、发生特点菜粉蝶又名菜白蝶、白粉蝶、小菜粉蝶等,其幼虫通常称菜青虫。菜粉蝶在新疆1年发生3～4代,以蛹在篱笆、树干、土缝、杂草或残枝落叶间越冬,南疆3月中下旬、北疆4月中旬越冬蛹开始羽化。5月上中旬产卵,4～8天后孵化出幼虫,5月 First, the occurrence of characteristics Cabbage butterfly also known as white butterfly, white butterfly, cabbage butterfly, etc., the larvae usually called cabbage caterpillar. Cabbage butterfly occurs in Xinjiang for 3 to 4 generations in one year. Pupae overwinter between fences, tree trunks, soil seams, weeds or stumps. In mid to late March in southern Xinjiang, overwintering pupae begin to emerge in mid April in northern Xinjiang. Spawning in mid-May and larvae hatching in 4-8 days, May