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菜蛾又名小菜蛾、吊死鬼、两头尖等。分布于全世界,我国各省都有发生。主要危害白菜、甘蓝、花耶菜等十字花科作物。初龄幼虫仅取食叶肉、残留下表皮,农民称之为“开天窗”,3~4龄幼虫可将叶片吃成缺刻,严重时成网状。据调查,其对农药产生抗药性的速度居各种害虫之首,是一种难?
Diamondback moth, also known as diamondback moth, hanging haunted, two sharp and so on. Distributed in the world, all our provinces have occurred. The main harm to cabbage, cabbage, flowers yew and other cruciferous crops. The first instar larvae fed only the mesophyll, leaving the lower epidermis, peasants called “open skylight”, 3 ~ 4 instar larvae can eat into a notch, severe mesh. According to the survey, the rate of resistance to pesticides in the first of various pests is a kind of difficulty?