冬小麦雪腐病(Typhula Itoana Imai),是北疆为害冬小麦的一种主要苗期病害。根据1953年以来的有关调查资料,该病不仅在乌鲁木齐、阜康、米泉、昌吉、呼图壁、玛纳斯、沙湾、伊宁、绥定、新源、察布查尔和阿勒泰等地普遍发生,并且经常造成麦苗在越冬期间和返青前的大量死亡。例如1953年在昌吉县的四个区,麦苗的平均死亡率达24.7％;1955年该县第一区的麦苗平均死亡率为9.4％、第四区为 Typhula Itoana Imai is a major seedling disease in winter in northern Xinjiang. According to the relevant survey data since 1953, the disease is not only found in places such as Urumqi, Fukang, Miquan, Changji, Hutubi, Manas, Shawan, Yining, Suidin, Xinyuan, Chabuchar and Altay It is widespread and often leads to a large number of deaths of wheat seedlings during the wintering season and before reentry. For example, in 1953 in the four districts of Changji County, the average mortality rate of wheat seedlings reached 24.7%; in 1955, the average mortality rate of wheat seedlings in the first district was 9.4%, and in the fourth district was