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昆虫天敌对于昆虫的发生常有抑制的作用,科学工作者根据这一原理,利用害虫的天敌去防治害虫,其方法称为害虫生物防除法. 昆虫的天敌很多,包括病原微生物(病毒、细菌、真菌和原生动物)线虫、壁虱目动物,昆虫(捕食性昆虫及寄生性昆虫)和脊椎动物.除此以外,还可包括一些高等植物.昆虫的天敌,虽然有上述的几大类,但并非全部都能够用来防治害虫,利用得最普遍的是捕食性昆虫和寄生性昆虫,其次是病原微生物和脊椎动物,至于线虫和壁虱目动物,只是偶有利用.
Natural enemies of insects often have an inhibitory effect on the occurrence of insects, scientists use this principle to control the pests by their natural enemies, and its method is called biological control of pests. Many insects have natural enemies, including pathogenic microorganisms (viruses, bacteria, Fungi and protozoa) nematodes, tick-borne animals, insects (predatory and parasitic), and vertebrates. In addition to these, higher plants may also be included. Natural enemies of insects, although of the above categories, Not all can be used to control pests. The most commonly used are predatory insects and parasitic insects, followed by pathogenic microorganisms and vertebrates, while nematodes and tick-borne animals are only used occasionally.