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水稻叶鞘黑点病是新近引起人们注意的一种病害,以单季晚稻受害较为普遍。主要发生在稻叶叶枕附近的叶鞘上,常被误认为稻瘟病的叶枕瘟而加以忽视。实际上,水稻叶鞘黑点病早在1910～1918年日本已有发现。在我国,近年来本市宜兴、无锡、江阴及相邻的武进等县均有发生,一般在8月上旬开始盛发,下旬达到高峰期。局部田块造成严重减产。据13个农场3个大队30块田的抽查,由块发病率达100％,平均株发病率达72.9％,病情指数为22.8,结实率下降9.4％,千粒重下降11.9％。
Rice leaf sheath black spot disease is a recent cause of attention of a disease, to single-season late rice damage is more common. Mainly occurred in the leaf sheath near the leaf sheath, often mistaken for the rice blast leaf pillow disease and neglected. In fact, rice sheath black spot disease as early as 1910 ~ 1918 Japan has been found. In our country, Yixing, Wuxi, Jiangyin and neighboring Wujin counties in this Municipality have all occurred in recent years. Generally, they flourished in early August and peaked in late August. Local plots caused serious cuts. According to the random inspection of 30 plots in 13 farms of 13 farms, the incidence rate reached 100% with the average incidence of 72.9%. The disease index was 22.8, the seed setting rate decreased 9.4%, and the grain weight decreased 11.9%.