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大菜粉蝶(Pieris brassicae L.),又名甘蓝粉蝶、大白蝶,其幼虫俗称甘蓝毛虫,属鳞翅目粉蝶科,为害油菜、白菜、萝卜和甘蓝等十字花科作物。此虫在新疆一年发生三代,其小龄幼虫群集于叶背啃食叶肉,龄期大后则分散成小群暴食叶片,甚至连叶脉和叶柄都吃光,严重影响油菜和蔬菜的质量和产量。 1978年,我们在大白菜和油菜等作物上发现大菜粉蝶幼虫自然罹病死亡现象,经回接、镜检、石蜡切片、PTA负染和超薄切片电镜观察,证明大菜粉蝶幼虫自然感病死
Pieris brassicae (Pieris brassicae L.), also known as cabbage white butterfly, big white butterfly, its larvae commonly known as cabbage caterpillar, is a Lepidoptera Pieris division, damage rape, cabbage, radish and cabbage cruciferous crops. This worm occurs three generations a year in Xinjiang. The young larvae clustered on the back of the leaf to gnaw on the mesophyll. After the age, the insects dispersed into small groups of gluttony leaves. Even the veins and petioles eaten, which seriously affected the quality of the rape and vegetables Yield. In 1978, we found natural larvae died of death in the cabbage and rapeseed crops, and the natural death of the cabbage butterfly larvae was confirmed by back attachment, microscopic examination, paraffin section, negative PTA staining and ultrathin section electron microscope observation