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赤枯病是水稻生产上一种生理性病害,俗称“红僵苗”或“铁锈病”。近几年来此病在各地普遍发生,并呈逐年扩大、加重的态势。受害田一般减产1至2成,严重田块损失5成以上。一、症状一般在秧苗移(抛)栽后10至15天开始发病,病程短的一个月左右,长的达2个月之久。主要表现为秧苗迟迟不返青,或返青后生长不良,僵苗不发,甚至死苗。受害株地上部矮小,分蘖减少或不分蘖,开始叶色浓绿,以后下部叶片沿中脉出现赤褐色斑点,并逐渐扩大致使整个叶片干枯、变焦,远望像“火烧田”。稻根开始也为深褐色,后变黑、腐烂、发
Red blight is a physiological disease in rice production, commonly known as “red stamen” or “rust disease.” In recent years, the disease has taken place in various places and has been gradually expanding and aggravating. Damage to the field generally cut 1 to 2 percent, 50 percent more serious field loss. First, the symptoms generally move (throw) 10 to 15 days after transplanting began disease, short duration of about a month, up to 2 months long. The main performance of the late seedlings did not turn green, or poor growth after turning green, stiff seedlings do not send, or dead seedlings. Damage to the upper part of the plant dwarf, tiller reduce or no tiller, began leaf color dark green, after the lower leaves along the midrib appears auburn spots, and gradually expand the cause of the entire leaves withered, zoomed, far look like “fire field ”. The root of rice also dark brown, after the black, decay, hair