杂交中稻一再生稻耕作区,纹枯病对中稻和再生稻均造成为害,主要表现在中稻后期早衰,再生稻生长期继续受害,造成水稻减产。因再生稻对头季稻有较强依赖性,防治再生稻纹枯病必须从头季稻抓起。两年试验表明,中稻纹枯病始病期、孕穗末期和再生稻孕穗末期各防治1次,对提高纹枯病的总体防效,增加再生稻产量有明显效果。 Hybrid rice middle-aged rice cropland, sheath blight on both medium and ratooning rice are harmful, mainly in the late middle-aged rice, ratooning rice continue to suffer the growth period, resulting in reduced production of rice. Due to the strong dependence of ratoon rice on the first season rice, the control of ratoon sheath blight must start from the first season rice. Two years of experiments showed that the control of sheath blight in the beginning, booting stage and booting end of rachis control each time, to improve the overall control effect of sheath blight and increase the yield of ratoon has a significant effect.