寄生蝇广泛寄生于鳞翅目、鞘翅目、膜翅目、双翅目等多种昆虫,是影响农、牧、林、果树、蔬菜多种害虫消长的重要天敌之一。在适宜环境条件下,能控制害虫大量发生,使之不致造成危害。据在凉城1979年至81年三年调查寄蝇在粘虫上的寄生率分别为37.3％,59.3％,41.30％;1980年在草地螟上寄生率为57％;1978年在黑银纹夜蛾上寄生率为35.7％。商都县1981年在粘虫寄生率达68-72.6％。可见它们的寄生范围是很广泛的。内蒙西部地区几种常见的寄蝇如下: Parasitic flies widely parasitize Lepidoptera, Coleoptera, Hymenoptera, Diptera and other insects, is affecting the growth of a variety of pests of agriculture, animal husbandry, forestry, fruit trees, vegetables, one of the important natural enemies. Under appropriate environmental conditions, can control the large number of pests, so that it will not cause harm. According to the survey conducted in Liangcheng for three years from 1979 to 2001, the parasitism rates of fly flies on armyworm were 37.3%, 59.3% and 41.3% respectively. The parasitic rate on meadow flies in 1980 was 57%. In 1978, The parasitic rate on the moth was 35.7%. Shangdu County in 1981 the armyworm parasitic rate of 68-72.6%. Can be seen that their parasitic range is very wide. Several common flies in western Inner Mongolia are as follows: