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玉米大斑病在我国玉米产区均有发生，近年由于大面积种植掖单4等易感的杂交种，导致大斑病频繁流行，造成严重减产。利用抗病品种是防治大斑病的根本措施，但是在现用感病品种未能及时更换而病害流行的情况下，及时进行化学防治是保产的必要手段。为此，作者1996年进行了几种杀
Corn blight has occurred in China’s maize producing areas. In recent years, large-scale cultivation of susceptible hybrids such as Yedan 4 has led to the frequent epidemic of big spot disease, resulting in serious production cuts. The use of disease-resistant cultivars is a fundamental measure for the prevention and cure of spotted leaf blight. However, if the current susceptible cultivars can not be replaced in time and the disease is endemic, timely chemical control is a necessary means of ensuring production. To this end, the author conducted several killings in 1996