玉米小斑病是一种世界性的老病害,70年代以前,由于发生得不太严重,未能引起人们的重视。1970年该病在美国大流行,使玉米产量减产15％以上,损失粮食165亿公斤,因而震动了世界玉米生产国家。 生产实践证明,选用抗病品种是防治本病的一项经济有效措施。鉴定我国玉米资源对小斑病的抗性,为抗病育种部门提供抗源,已是当务之急。为此,我们从1987-1989年 Smaller spot blight is a worldwide old disease. Before the 1970s, due to less serious occurrence, it failed to attract people’s attention. The disease was hit by the pandemic in the United States in 1970, reducing maize production by more than 15% and losing 16.5 billion kilograms of grain, thus shaking the world’s maize-producing countries. Production practice has proved that the use of resistant varieties is the prevention and treatment of the disease is a cost-effective measures. Identification of China’s maize resources on the resistance to small spot disease, resistance and breeding departments to provide resistance, it is imperative. To this end, we from 1987-1989