通过对唐山市2002年夏玉米纹枯病发生条件的研究分析,确定了该病的流行趋势。通过对产量与纹枯病发病株率的统计分析,确立了纹枯病是造成2002年本地区夏玉米普遍严重减产的主要原因,排除了蚜虫危害是主要原因的观点,对本地区玉米科研和生产具有一定的指导作用。 Through the investigation and analysis of the occurrence of summer corn sheath blight in Tangshan City in 2002, the epidemic trend of the disease was confirmed. Through the statistical analysis of the rate of occurrence and the incidence of sheath blight, it was established that sheath blight was the main cause of the serious maize cut in the region in 2002, which ruled out the main reason of the harm of aphids. In this area, the research and production of maize Has a guiding role.