1999年常州市水稻稻曲病偏重流行 ,全市调查1 3 2块未防治稻田 ,平均病穗率 2 4 .2 7%,病粒率0 .64 %。为了明确稻曲病曲果的发生规律 ,我们从水稻破口抽穗期至成熟期进行定点系统观察。水稻品种为 95～ 1 6(未审定 ) ,每隔 2ｄ观察 1次 ,定 3 0 0穗 ,当出现病穗时 ,挂牌跟踪观 In 1999, Changzhou rice false smut prevailed, and the whole city was not in control of paddy field. The average disease rate was 24.27% and the disease rate was 0.64%. In order to clarify the occurrence of False Trichosanthes, we observed the rice from the heading stage to mature stage. Rice varieties 95 ~ 1 6 (not yet approved), observed once every 2d, set 300 ears, when the disease panicle, the listing tracking concept