赤枯病俗称僵苗,是一种生理性病害。水稻发病后,叶片枯死,生育期延迟,对产量有不同程度的影响。一、症状识别一般水稻分蘖后开始发生,受害水稻矮化,老叶黄化,心叶变窄、直,茎秆细小,分蘖少而小。初期上部叶片为深绿色或暗绿色,进而基部老叶尖端出现边缘不清的褐色小点或短条斑,后发展成为大小不等的不规则铁锈状斑点。 Red blight known as stiff seedlings, is a physiological disease. After the onset of rice, the leaves withered, the growth period delayed, on the yield to varying degrees. First, the symptoms of identification General Rice began to occur after tillering, damage to rice dwarf, yellowing old leaves, heart leaves narrow, straight, small stems, tillers less and smaller. Early upper leaves dark green or dark green, and then the tip of the tip of the old leaves appear unclear brown spots or short spots, and later developed into irregular rust spots of varying sizes.