水稻白叶枯病,一九六四年开始在我省局部地区发生。几年来,发病面积逐渐增加,危害亦愈加重,已成为我省水稻生产的大敌之一。一九七一年,对全省水稻白叶枯的疫情进行了全面普查,对发生与防治进行了一些调查研究,现将结果简述如下。一、病状病斑主要生于叶片上,主要有典型和急型两种类型。典型症状初期是在叶尖 Rice bacterial leaf blight, 1964 began in some areas in our province. Over the past few years, the incidence of the area gradually increased, more and more harmful, has become one of the enemy of rice production in our province. In 1971, a comprehensive survey of the epidemic situation of rice leaf blight in the province was carried out, and some investigations on the occurrence and prevention were carried out. The results are summarized as follows. First, the pathological lesions are mainly born on the leaves, there are two types of typical and acute. The initial symptoms are at the tip of the tip