玉米纹枯病已成为承德市玉米生产上的主要病害 ,植株发病高度达果穗部位 ,直接影响到产量和籽粒品质。从田间发病结果看 ,玉米穗位高度表现出明显的不同发病结果。随穗位高度增加果穗感病明显减轻 ,反之有加重的趋势。因此适当选择穗位高的品种可以降低果穗发病的机会 ,同时对低穗位的玉米品种和自交系及早进行防治 ,以推迟发病时间和减轻病害的发生 Corn sheath blight has become a major disease in the production of corn in Chengde City, the plant up to the height of the ear parts, a direct impact on the yield and grain quality. From the field incidence results, corn ear height showed significant different results. With ear height increased significantly reduce susceptibility to ear, on the contrary there is a tendency to aggravate. Therefore, the appropriate choice of ear-high varieties can reduce the chance of ear morbidity, and at the same time, low-ear corn varieties and inbred lines early prevention and treatment to postpone the onset time and reduce the occurrence of diseases