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有些螨类给农业生产带来很大的危害。果树被红蜘蛛为害,严重时可使叶子枯焦而影响产量。为害柑桔的锈螨不仅影响产量,同时使果皮变黑,也严重的影响了质量。据估计在华北区一带被棉红蜘蛛为害的棉田,所受的损失平均可减产达30％左右。螨类的体型虽小,但繁殖蔓延为害却极迅速,特别近几年来某些地区由于广泛使用DDT的结果,杀死一些螨类的天敌,而使螨类为害更形猖獗,因此有效地抑制螨类的为害,已成为当前很重要的问题。
Some mites cause great harm to agricultural production. Fruit trees are red spider damage, serious leaves can affect the yield Jiaojiao. Rust mites damage citrus not only affect the yield, while darkening the peel, but also a serious impact on the quality. It is estimated that cotton fields damaged by spider mites in North China may suffer an average loss of about 30%. Although the body size of mites is small, their reproduction and spread are extremely harmful. Especially in some areas, due to the widespread use of DDT in recent years, some mites have been killed and natural enemies of mites have become more rampant, thus effectively inhibiting The damage of mites has become a very important issue at present.