Abstract: Hughes' analytical approach was used for constructing time-specific life tables of the Russian wheat aphid (RWA)，Diuraphis noxia (Mordvilko)，to examine effects of different factors on its population dynamics in wheat，barley and oat plots in Xinjiang Uygur Autonomous Region，China. It showed that the predatory enemies played leading role in suppressing population growth of the aphid in early season in wheat field. Both predators and parasitoids were basic factors controlling the RWA population in the middle and late season in wheat，barley and oat plots. The alatae emigration as a self-regulating factor within the population was also important when the aphid density increased to certain level.

Key words: Russian wheat aphid (Diuraphis noxia (Mordvilko)), natural population, timespecific life table