Abstract: The niche breadth and overlap of the four wheat aphids, Diuraphis noxia (Mordvilko), Schizaphis graminum (Rondani.), Sitobion avenae (F.) and Rhopalosiphum padi (L.), were measured based on the survey data in Tacheng and Ili, Xinjiang Uygur Autonomous Region. D. noxia and R. padi occupied longest temporal niche in Tacheng and Ili wheat field respectively. S. graminum had the greatest spatial and tempo-spatial niche breadths in Ili. Temporal niche of D. noxia overlapped mostly with that of S. graminum in Tacheng. However, in Ili, S. avenae and D. noxia overlapped mostly in their temporal niches. S. avenae and S. graminum heavily overlapped in both spatial and tempo-spatial niches.

Key words: Xinjiang Uygur Autonomous Region, wheat aphids, niche