穗颈瘟主要危害水稻的穗颈、穗轴、枝梗和谷粒,在穗颈、穗轴上产生褐色腐烂斑,可造成空秕粒增多,千粒重下降,对水稻产量和品质影响很大。因此,生产中应注意加强防治。下面介绍这一病害的主要症状、发生特点和防治方法,供参考。主要症状:穗颈瘟主要发生在水稻穗颈和枝梗基部,产生褐色小斑点,病斑经过扩展蔓延后环绕穗颈 Panicle neck blast harm rice ear panicle, cob, branch stem and grain, panicle and panicle produce brown rotten spots, can cause increased Kong Kong tablets, grain weight decreased, a great impact on the yield and quality of rice. Therefore, production should pay attention to strengthening prevention and control. The following describes the main symptoms of this disease, the occurrence of characteristics and prevention methods for reference. Main symptoms: panicle blast occurs mainly in the base of rice panicle and branch stems, resulting in small brown spots, lesions spread through spreading around the panicle neck