70年代中、后期 ,玉米纹枯病 (ＲｈｉｚｏｃｔｏｎｉａＳａｋａｋｉｉ)曾在我国南方一些夏玉米种植地区严重发生。近年来 ,随着玉米高产栽培措施和高产品种的推广应用 ,山东省枣庄、曲阜、泰安、滕州等地玉米纹枯病日趋严重。1 998年调查 ,一般病田的病株率为 1 0 %～ 50 %,重 In the mid- and late 1970s, RhizoctoniaSakakii was severely affected by some summer maize growing areas in southern China. In recent years, along with the high-yielding cultivation measures of corn and popularization and application of high-yielding varieties, the sheath blight of corn in Zaozhuang, Qufu, Taian, Tengzhou and other places in Shandong Province is becoming more and more serious. Survey in 1998, the general disease of the disease rate of 10% to 50%, weight