近年来,随着棚室蔬菜的大面积种植,而发生了一种晚秋、深冬、早春也能在蔬菜上寄生和危害的新虫害——白粉虱。其成虫和若虫聚集在蔬菜叶背面吸食汁液。危害轻时叶面出现密密麻麻的小白点,严重时叶面干枯。分泌的蜜露积存于叶面,常导致煤污病的发生和病毒病的传染。 白粉虱一年发生10代左右,周年危害。寄主广泛,繁殖快,传播途径多,世代重叠,抗药力强,各虫态混生交替,防治技术一般采用以下五法: 一、低温灭虫 棚室蔬菜的生产中,利用晚秋、深冬、早春倒茬的时机,首先清除棚室内的残枝落叶,它们是虫卵寄 In recent years, with the large-scale cultivation of greenhouse vegetables, a late-autumn, deep-wintering and early-spring pests that can parasitize and endanger the vegetables - whitefly, occur. Its adults and nymphs gathered in the back of the leaves of vegetables to drink juice. Harm light foliage appear dense white spots, dry leaves in severe cases. Secreted honey dew accumulated in the foliage, often lead to the occurrence of coal pollution and viral diseases. Whitefly occurs about 10 generations a year, annual damage. Host widely, rapid propagation, transmission routes, overlapping generations, strong resistance, alternate alternation of insect states, prevention and control technology generally uses the following five methods: First, low temperature pest control greenhouse vegetable production, the use of late autumn, winter, early spring The timing of the stubble, the first removal of shed branches of the leaves, they are eggs sent