白叶枯病是一种细菌性病害,也是国内植物检疫的对象。一九七一年,我们枫围公社在早稻上发现白叶枯病后,四年来连年发生,为害水稻面积逐年扩大,受害品种亦不断增多,从矮南早39号一个品种,发展到二九南、二九陆、加农14、桂花黄等好几个品种。一九七三年,后季稻上也严重发生。白叶枯病来势猛,发展快,为害重。今年东风大队第三 Bacterial blight is a bacterial disease, but also the object of domestic phytosanitary. In 1971, after we discovered the bacterial blight on early rice in the Maple Crossing commune, it occurred year after year in four years. The area harming rice has been expanding year by year. The varieties of victims have also been increasing. From a variety of short south as early as 39 to twenty-nine South, eighteenth land, Cannon 14, sweet-scented osmanthus yellow several varieties. In 1973, the latter quarter of rice also occurred seriously. Bacterial blight is fierce, rapid development, heavy damage. Dongfeng brigade this year third