水稻叶褐斑病于1990年5月初在梧州市苍梧县稻作区首次发生.病害从稻株的下部叶片开始,病叶变成绿褐色枯斑,有的如开水烫熟般的萎垂,导致全田褐枯,严重抑制稻株生长,造成为害.全县以新地镇堤甫村的古令、思现、武界等村小组的高产样板田为 Rice leaf spot disease first occurred in the rice planting area of ​​Cangwu County, Wuzhou city in early May 1990. The disease started from the lower leaves of the rice plant, and the diseased leaves turned into greenish-brown spots. Some of them were withered like boiled water , Resulting in brown hair all over the field, severely inhibited the growth of rice plants, causing harm to the county town of embankment Fucun ancient thinking, thinking now, Wujie village group of high-yielding model field