近几年来稻曲病〔Ustilaginoidea virens(Cke.)Tak.〕在我县年年有所发生,山区丘陵较重,已成为二晚穗期的重要病害。特别是1982年特殊的气候条件下,稻曲病在江南稻区发生面积大,发病重,为历史上少见,引起了人们的极大关注。为弄清稻曲病的发病因素及对产量损失的影响,1981～1982年我们进行了稻曲病田间发病调查和室内考种工作,现简报如下。 In recent years, Ustilaginoidea virens (Cke.) Tak.) Occurs in our county year after year. The mountainous hills are heavy and have become an important disease in the second night. Especially in 1982, under the special climatic conditions, False germfly occurred in the rice growing areas in southern Jiangsu Province, with large area and heavy morbidity. It is rare in history and has aroused great concern of people. To clarify the incidence of false smut disease and the impact on yield loss, 1981 ~ 1982 we conducted a field trial of rice smut disease and indoor examination work, are briefings are as follows.