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菜蛾Plutella xylostella(L.)是世界性十字花科蔬菜重要害虫,在本区的发生过去未被重视也未进行必要的研究.随着近年蔬菜生产的迅速发展,其为害有扩展加重趋势.1986～1988年我们以银川市郊区、永宁县蔬菜田为试验田,结合室内饲养观察,对此虫作了初步调查研究,现报告如下.
Plutella xylostella (L.) is an important pest of cruciferous vegetables in the world, and its occurrence in the area has not been taken seriously and no necessary research has been conducted in the past. With the rapid development of vegetable production in recent years, its harm has been expanding. 1986 to 1988 we Yinchuan suburbs, Yongning County vegetable fields as experimental fields, combined with indoor feeding observation, the worm made a preliminary investigation and research, are as follows.