该病是水稻生产上分布最普遍、危害最严重的病害。主要危害水稻植株的叶鞘、叶片、茎秆和穗部,以叶鞘受害损失最大,如果防治不及时,水稻结实率下降,秕谷率增加,粒重减轻,一般水稻减产10%,严重的可减产30%,给稻农造成较大的经济损失,影响稻农的种稻积极性。现将水稻纹枯病的发病症状及防治技术介绍如下。 The disease is the most widespread distribution in rice production, the most serious damage to the disease. The main damage to the leaf sheath, leaves, stems and ears of rice plants to leaf sheath damage the most, if the control is not timely, the rice seed setting rate decreased, the rate of tamarism increase, grain weight reduction, the general reduction of 10% of rice, severe yield reduction 30%, causing greater economic losses to rice farmers, affecting rice farmers enthusiasm for rice cultivation. Now the incidence of rice sheath blight symptoms and prevention techniques are as follows.