大家知道,水稻针对纹枯病具有抗病品种极少,发生十分普遍,危害日益加重,甚至造成穿顶倒伏和先由稻株下部发病,容易忽视而错过防治有利时机等特点。近年来,已成为水稻的主要病害之一。水稻发生纹枯病危害,可造成结实率和千粒重显著降低,甚至植株倒伏枯死,导致严重减产。 As we all know, there are very few disease-resistant varieties of rice against sheath blight. The occurrence is very common and the harm is aggravating. Even the top of lodging and the lower incidence of rice plants are easily overlooked, and the opportunity for prevention and treatment is missed. In recent years, it has become one of the major diseases of rice. The occurrence of sheath blight in rice could result in a significant decrease in the seed setting rate and 1000-grain weight, even in the case of plants lodging and withering, leading to serious yield reduction.