捕食性天敌昆虫数量甚多,包括有19目188科的昆虫。其中蜻蜒目、螳螂目和脉翅目全部都是捕食性昆虫。半翅目既有捕食性昆虫,也有植食性昆虫。鳞翅目则多数是植食性的,少数是捕食性的昆虫。在捕食性昆虫中,还有随其虫态的发育而益害交替的,如芜菁科昆虫的幼虫多为捕食性益虫,而成虫却往往是植食性的害虫。因此,必须充分了解捕食性昆虫的生活习 There are many predatory natural enemies of insects, including 19 heads of 188 families of insects. Among them, the dragonfly, mantis and venom are all predatory insects. Hemiptera both predatory insects, but also herbivores insects. Lepidoptera are mostly herbivorous, a small number of predatory insects. Among the predatory insects, there are alternate benefits from the development of their insect states. For example, the larvae of the litchi family are mostly predacious insects, while the adults are often pests of herbivores. Therefore, we must fully understand the habits of predatory insects