水稻白叶枯病,是国内植物检疫对象之一。水稻被害后一般减产１～３成,重的可达５成以上,严重威胁水稻生产。现将白叶枯病的症状和综合防治技术简要介绍如下:一、症状该病的初次侵染源是带病的种子和稻草。病和产要危害叶片,呈枯白色。发病初期在叶尖或叶边缘发生细小暗绿色短条 Rice bacterial leaf blight, is one of the object of domestic phytosanitary. After the damage of rice generally reduced by 1 to 3 percent, up to more than 5 percent, a serious threat to rice production. Now the symptoms of bacterial blight and comprehensive prevention and control technology is briefly described as follows: First, the symptoms of the disease is the initial source of infection of sick seeds and straw. Diseases and obstetric endanger the leaves, was dry white. Early in the leaf tips or leaf edges occur small dark green short