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水稻纹枯病是水稻上常发性和重发性病害。随着水稻高产及超高产品种的推广应用、水稻施肥量的增加、水稻轻型栽培面积的扩大,以及气候条件的异常,水稻纹枯病发生危害日趋严重。自2005年以来,水稻纹枯病已连续7年大发生,尤其是2009、2010、2011年发生危害最为严重,造成部分水稻田因纹枯病的危害而出现“冒穿到顶、枯死倒伏”现象,严重田块水稻产量损失30%～45%,纹枯病的发生危害程度已远远超过水稻稻瘟病、条纹叶枯病等,成为水稻第一大病害。
Rice sheath blight is a frequent and recurrent disease on rice. With the popularization and application of high yield and super high yielding varieties of rice, the increase of fertilizing amount of rice, the expansion of light cultivating area of rice, and the abnormal climatic conditions, the occurrence of sheath blight of rice is more and more serious. Since 2005, sheath blight of rice has occurred for seven years in a row, especially in 2009, 2010 and 2011, causing the most serious damage, causing some rice fields to appear as a result of sheath blight. " Phenomenon, severe field rice yield loss of 30% to 45%, the occurrence of sheath blight hazards far more than rice blast, striped leaf blight, become the first major disease in rice.