玉米纹枯病俗称烂裤腿、花脚杆,近几年随着玉米面积的扩大和高产密植栽培技术的推广,玉米纹枯病成为玉米的主要病害之一。一、危害症状该病主要发生在玉米生长的后期,主要危害玉米叶鞘、果穗和茎秆。在叶鞘和果穗苞叶上的病斑为圆形或 Corn sheath blight commonly known as rotten trouser legs, flower legs, in recent years with the expansion of corn area and high density planting cultivation technology promotion, corn sheath blight as one of the major diseases of corn. First, the harm symptoms The disease occurs mainly in the late maize growth, the main harm corn leaf sheath, ear and stem. Lesions on leaf sheaths and ear bracts are rounded or