本试验就4个玉米品种黄斑病的发生规律进行了研究。结果表明,发生黄斑病的叶片常从中下部开始。在黄斑病发生的早期,病情指数的增加主要是由于发病率的增加所引起的,后期主要是由于病级的增加所引起,且品种的抗病性影响了小斑病发生的早晚、轻重以及流行曲线的增长的快慢,抗小斑病的品种发病晚且轻,并且其流行曲线平缓,感病的品种与此相反。 In this study, the occurrence patterns of four yellow corn varieties were studied. The results show that the leaves of the occurrence of maculopathy often start from the lower part. In the early stage of maculopathy, the increase of disease index was mainly caused by the increase of the incidence. The later stage was mainly caused by the increase of disease grade. The resistance of the cultivars affected the occurrence of squamous cell disease sooner or later, The growth of the epidemic curve of the speed of resistance to small spot disease varieties late and light onset, and the prevalence of the curve is flat, susceptible varieties in contrast.