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自5月以来,湖南省阴雨寡照天气较多,适温、高湿有利于稻瘟病的发生,早稻稻瘟病发生明显重于去年,菌源广泛存在。中稻移栽以来,稻叶瘟发生时间早、范围广、病叶率高,明显重于上年。截至7月16日,全省除湘潭市外,稻瘟病在各市州普遍发生,一般病叶率为0.2%~10.4%。纹枯病发生情况也重于去年同期。近10天湖南全省大部以晴雨相间天气为主,温、湿度适宜纹枯病的发生流行,在中稻上扩展较快,各市州一般病蔸率为10%
Since May, there has more rain and light weather in Hunan Province, which is favorable for the occurrence of rice blast. The incidence of blast in early rice is obviously heavier than last year, and the sources of bacteria are widespread. Since the transplanting of middle rice, rice blast occurred early, with a wide range, the rate of diseased leaves was significantly heavier than the previous year. As of July 16, the province except Xiangtan City, rice blast in cities and states generally occur, the general disease rate of leaves 0.2% to 10.4%. The incidence of sheath blight is also heavier than the same period last year. In the recent 10 days, most of the province’s Hunan province was dominated by the weather with clear and rainy weather, and the occurrence of sheath blight suitable for temperature and humidity was prevalent. It spreads rapidly on Zhonghong, with a prevalence of 10%