Abstract: In Ili Prefecture, Xinjiang Uygur Autonomous Region, 36 wheat varieties were tested in fields for their tolerance and yield losses to Russian wheat aphid, Diuraphis noxia (Mordvilko). Eleven varieties including One-kernel Wheat, Moyu Daosui, Aiyinkang, Xiaoyan95, Mg8349, Duanmang Heibianhong, Yichun4, Xiaoheimai12, Funaer, Maodatou and T1008 exhibited higher tolerance with thousand-kernel weight reduction lower than 10%. Considering the natural infestation rate and thousand-kernel weight reduction, the yield losses of the tested varieties ranged from zero to 10.56%. Under 2% of yield loss were there 14 varieties: One-kernel Wheat, Aiyinkang, Mg8349, Mg8786, Funaer, Duanmang Heibianhong, T1008, Moyu Daosui, Xiaoheimai12, Guangyin74, Mg4521, Yellow Kuerban, Mg8816 and Xiaoyan95.

Key words: Russian wheat aphid (Diuraphis noxia (Mordvilko)), wheat variety, tolerance, yield loss