Among 5 diseases, smut occurred commonly on the pasture of Stipa grandis in northern of Xilinhot in 1998, the other 4 diseases occurred very little in the same area.

• 这5种病害均属国内新发现的大针茅病害，其中穗黑粉病1998年在锡林浩特以北某些大针茅草场上发生较为普遍，其他仅有少量或微量发生。