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目前,夏季高温干燥,有利于叶螨繁延为害,尤其是在透风差的大棚两头和后部,为害较重。危害越夏大棚蔬菜的叶螨有:朱砂叶螨、截形叶螨、二斑叶螨、茶黄螨等。其寄主范围广,没有蔬菜不发生叶螨,主要危害瓜类、茄果类、豆类等蔬菜。叶螨个体小,不易被发现,成螨和若螨均可造成为害,以口针刺吸蔬菜,吸食汁液,破坏植株叶片的叶绿素,常使叶变黄白色或皱缩畸形,影响光合作用,为害严重时叶面一片黄白或呈火烧状干枯。
At present, the summer high temperature drying, is conducive to the spider mite propagation damage, especially in poorly ventilated greenhouse both ends and rear, more serious damage. Harm the summer greenhouse spider mites are: Tetranychus cinnabarinus, truncated spider mites, two-spotted spider mites, tea yellow mites and so on. Its host a wide range of vegetables without spider mites, the main damage to melons, solanaceae, beans and other vegetables. Spider mites individual small, not easy to be found, into mites and nymphs can cause harm to acupuncture sucking vegetables, sucking juice, destroy plant leaf chlorophyll, leaves often yellow or white shrinkage deformity, affecting photosynthesis, Serious damage when a yellow or yellow leaves were burning dry.