一、症状水稻赤枯病,农民称之为“坐蔸病”。水稻移栽田块秧苗发黄、发红、发僵的症状大多属此病。该病主要是由于温、光、水、肥、气等不良环境条件引起的一种生理病害。秧苗在移栽半月后,常表现发黄、久不返青或返青后迟迟不分蘖,逐渐萎缩,生长停滞,严重时稻叶发红成焦枯状,下部叶片枯死,全田翻黄,植株矮小,不发蔸,远看如火烧状。拔起病株,可见根部白根少或无新根,多混有黑根或烂根,并有臭皮蛋气味。二、发病原因秧苗产生坐蔸的原因很多,笔者通过调查研究概括起来主要有 First, the symptoms of rice red blight, farmers call it “sicken”. Rice transplanting field seedlings yellow, red, stiff symptoms are mostly the disease. The disease is mainly due to temperature, light, water, fertilizer, gas and other adverse environmental conditions caused by a physiological disease. Seedlings in the transplanted half a month later, the performance of the yellow, long after no return to green or retarded late tiller, gradually shrinking, stagnant growth, severe red rice leaves into coke-like, the lower leaves withered, the whole field turned yellow, short plants, not Fat hair, far look like a burning state. Pull up the diseased plants, we can see the roots of white roots or no new roots, mixed with black roots or rotten roots, and stinky egg smell. Second, the cause of the disease There are many reasons for the emergence of seedlings sitting, the author summed up by the survey are mainly