水稻白叶枯病是一种危害性很大的的细菌性病害,是重要的检疫对象,目前已成为水稻产区主要病害之一。水稻白叶枯病从水稻苗期至抽穗期都会发生,但以最高分蘖期、幼穗分化期、抽穗前期发病为多。水稻受害后,叶片干枯,瘪谷增多,米质松脆,千粒重降低,一般减产10%～30%,严重的减产50%以上,甚至颗粒无收。 Rice bacterial leaf blight is a kind of bacterial disease which is very harmful. It is an important quarantine object and has become one of the main diseases in rice producing area at present. Rice bacterial blight occurs from the seedling stage to the heading stage of rice, but the incidence of the highest tillering stage, young panicle differentiation stage and early heading stage are more. After the damage of rice, the leaves withered, the flattened valley increased, the rice was crisp and the grain weight was reduced. Generally, the yield was reduced by 10% ~ 30% and the yield was reduced by 50% or even no crop was collected.