Studies on diapause of Trichogramma spp.may be of importance in mass rearing and utiliza-tion.The environmental and endogenous factors controlling the diapause were reviewed in the paper.Low temperature is a determinant factor in the induction of this diapause,but photoperiod also plays a major role.And others factors such as the maternal influence,species of the host and induction stages are also considered as influence on evoking diapause.The species of Trichogramma,and other factors must be considered in the designation of effective and stable measures for the induction of diapause.