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玉米小斑病(Bipolars Maydis)是世界玉米产区的主要病害之一,1970年曾使美国损失玉米165亿kg,我国的华北玉米区和华南部分玉米区也是该病的主要发生区。该病的流行与大面积种植感病品种密切相关,而防治该病的经济有效措施是选用抗病品种。为此“七五”、“八五”期间国家把玉米种质资源抗小斑病的筛选鉴定列为攻关内容。本文报道1992～1995年的研究结果。
Bipolars Maydis is one of the main diseases in the world corn production area. In 1970, the United States lost 16.5 billion kg of corn. The maize areas in North China and parts of South China are also the main areas of the disease. The prevalence of the disease is closely related to the large-scale cultivation of susceptible varieties, and the cost-effective measures for the prevention and control of the disease are the selection of resistant varieties. For this reason, during the “Seventh Five-Year Plan” and the “Eighth Five-Year Plan” period, the state screened and identified the resistance to small spot disease of corn germplasm resources. This article reports the results from 1992 to 1995.