稻瘟病又名稻热病。不仅为害早稻 ,也为害中、晚稻。对水稻生产威胁甚大。尤其是穗颈稻瘟病 ,常可使水稻生产前功尽弃、颗粒无收。近年来 ,稻瘟病发病面积逐年增大 ,瘟原菌多 ,感染的机会多 ,再加上气候变化异常 ,条件适宜 ,有利稻瘟病的发生发展。所以农户很有必要学会识别、 Rice blast, also known as rice fever. Not only harmful to early rice, but also for the harm, late rice. Great threat to rice production. Especially the panicle blast, often make rice crop failure, crop failure. In recent years, the incidence of rice blast increased year by year, plague bacteria more, more opportunities for infection, coupled with anomalous climate change, suitable conditions conducive to the occurrence and development of rice blast. Therefore, farmers are necessary to learn to identify,