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迁移性害虫即昆虫和螨类,是构成全世界粮食、纤维和其它可再生自然资源生产的一个主要经济性威胁,至1983年,北美记录的迁移种类已达1683种,其中235种是重要的有害生物,630种为次要有害生物,在必须进行防治的660种严重有害虫中,外源种类约占40％,它们造成的经济损失达所有10000多种害虫损失的50％,众所周知的墨西哥棉铃象、玉米螟、舞毒蛾,日本孤丽和苹果小卷蛾等都是迁移性害虫,过去50年中害虫管理的重点也便是这些和其它一些迁移性害虫。
Migratory pests, insects and acarids, constitute a major economic threat to the production of food, fiber and other renewable natural resources throughout the world. By 1983, North American recorded a migration of 1,683 species, of which 235 were important Pests and 630 species are minor pests and about 40% of the 660 pest species that have to be controlled have exogenous species that cause economic losses of up to 50% of all 10,000 species of pests, as is well known in Mexico Cotton boll weevil, corn borer, gypsy moth, Japanese ornithogalum and apple piers are all migratory pests, and pest management has also been the focus of these and other migratory pests over the past 50 years.