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水稻纹枯病是我区主要的水稻病害。近年,由于水稻复种指数的增加,耕作技术水平的提高,矮秆宽叶品种不断增多,纹枯病有急剧上升的趋势,其发病面积和危害超过白叶枯病和稻瘟病,成为水稻高产的主要障碍。该病在1972年全区发生51万亩,1973年发生178万亩,1974年193万亩,1975年又增至273万亩。从雷州半岛、鉴江、漠阳江流域的沿海、平原、丘陵以至北部山区皆有发生。平原区的茂名市郊,1975年纹枯病大流行,早稻发病5万亩,占早稻面积的34.6％,晚稻发病12万亩,占晚
Rice sheath blight is the main rice disease in our region. In recent years, due to the increase of rice multiple-cropping index and the improvement of farming techniques, the varieties of dwarf broad-leaved leaves are increasing and the sheath blight has a sharp rise. The disease area and harm exceed the bacterial blight and blast of rice and become the high-yielding rice The main obstacle. The disease occurred in 1972 throughout the region 51 million mu, 178 million mu in 1973, 193 million mu in 1974, and in 1975 increased to 273 mu. From the Leizhou Peninsula, Kam River, the desert coast of the Yangjiang River, plains, hills and even the northern mountain Jieke happen. Maoming outskirts of the plains area, 1975 sheath blight pandemic, the incidence of 50000 acres of early rice, accounting for 34.6% of the area of early rice, late rice incidence of 120000 acres, accounting for late