玉米细菌性茎腐病是我市近年来新发现的一种危害夏玉米的病害 ,该病在优质玉米主产区栾川、伊川、宜阳等地发生面积逐年扩大 ,由 1996年最初发生的 30 0ｈｍ2 扩展到现在的 4 6 6 7ｈｍ2 。一般发病田病株率 2 0 %左右 ,严重田块病株率达 10 0 % ,严重影响夏玉米的正常生长。经 Bacterial stalk rot of corn is a newly discovered disease of summer maize which was newly discovered in our city in recent years. The disease has been expanded year by year in Luanchuan, Yichuan and Yiyang, 30 0hm2 extends to the present 466 7hm2. In general, the incidence of diseased plants is about 20%, and the number of diseased plants in severe plots is up to 100%, which seriously affects the normal growth of summer maize. through