稻瘟病是水稻生长上的一大病害,稻瘟菌以菌丝潜藏在带病的稻草和种子上越冬,带病稻草遇到适宜的温度条件,陆续产生分生孢子,借风、雨、水传播蔓延,侵染水稻植株,可重复再侵染。因此,要抢前抓早,综合防治。冬季防治稻瘟病效果好。稻病的菌源主要在稻草、病 Rice blast is a major disease on rice growth. The mycelium of M. grisea lurks over the diseased straw and seeds overwintering. The diseased straw encounters suitable temperature conditions, and successively produces conidia, wind, rain and water Spread spread, infestation of rice plants, repeated re-infection. Therefore, we must grab ahead of time, comprehensive prevention and control. Prevention of blast in winter is effective. The main source of rice disease in straw, disease