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1990～2004年,玉米大斑病在忻州滹沱河流域的6个县(市、区)有4年大流行。其中2004年发病面积9万hm2,因病害减产约49500t。根据多年系统观察,发现病害的发生与流行和作物茬口、品种抗病性、气象条件、耕作管理等密切相关。控制该病害,必须在选育抗病品种的同时,大力推广秋深耕、轮作倒茬、增施农家肥、做好病情测报、适时喷药控制田间中心病株等综合治理措施。
From 1990 to 2004, the maize leaf spot had a 4-year pandemic in 6 counties (cities and districts) in the Hutuo River Valley of Xinzhou. Including 2004, the disease area of 90,000 hm2, about 49,500 tons due to disease reduction. According to years of systematic observation, the occurrence of diseases was found to be closely related to epidemic and crop stubble, disease resistance of varieties, weather conditions, farming management and so on. In order to control this disease, we must vigorously popularize the autumn deep plowing, crop rotation, increasing manure, doing a good job of measuring the disease, and timely spraying the integrated control measures such as controlling the diseased plants in the field centers.