玉米基腐病和茎腐病是近年来影响玉米生产的病害,在江苏以茎腐病的发生较普遍。两种病害的症状有些相似,但前者为害茎基,后者主要在玉米拔节期以后为害植株的中部,引起茎腐。玉米基腐病是由腐霉菌 Pythium aphanidermatum 引起的。玉米茎腐病是细菌性病害,本文报导病原细菌鉴定方面的研究结果。玉米茎腐病的病组织中分离到的菌株,分为三种不同的类型。 Corn-based rot and stem rot are the diseases that affect corn production in recent years. In Jiangsu, the occurrence of stalk rot is more common. The symptoms of the two diseases are somewhat similar, but the former harms the stem base, which harms stems mainly in the middle of the plant after the jointing stage of corn. Corn-based rot is caused by Pythium aphanidermatum. Corn stalk rot is a bacterial disease, this article reports the results of the identification of pathogenic bacteria. Strains isolated from diseased tissues of maize stalk are divided into three different types.