纹枯病是水稻主要病害之一,发生历史长,分布广、危害损失大。随着矮秆品种和杂交稻的推广,密植程度的提高,施肥数量逐年增加,纹枯病发生将会越来越重,危害损失越来、越大。今后5—10年内纹枯病将成为我市主要的水稻病害之一。发生历史和现状 Sheath blight is one of the major diseases of rice, which has a long history, wide distribution and great harm and loss. With the popularization of dwarf varieties and hybrid rice, the improvement of planting density, the amount of fertilizers increased year by year, the occurrence of sheath blight will be more and more serious, more and more harm the loss. In the next 5-10 years, sheath blight will become one of the major rice diseases in our city. History and current situation occur