Abstract: Though there are a lot of species of flies in Shanxi, common species are only about 129, of which, about 30 species are important.Many adults begin to appear in March and disappear in the end of November. The peak of their occurence is from middle Jane to the end of August. The hibernation of these flies is mainly at pupal stage, out also at adult and larva stages. These important species are active in human house, livestock farm and deit department. Their larvae are bred in human excrements, livestock dungs and garbage. The natural enemies of common flies are mites, wasps and others.Based on the bionomics of common flies in Shanxi, the principal control measures are proposed by the author.

Key words: Rice, Transpiration rate, Soil water, Microclimate