据了解我国玉米病害约40余种,在我省为害严重的有大斑病,丝黑穗病。但随着生态条件的变化和生物间竞争的结果,有些次要病害呈现上升趋势,为引起有关部门注意,我们从1978～1987年间对过去玉米上几种病害进行调查,现将结果整理如下。 It is understood that more than 40 species of maize diseases in our province, severe damage in our province are big spot disease, head smut. However, with the change of ecological conditions and the result of competition among organisms, some minor diseases show an upward trend. In order to arouse the attention of relevant departments, we conducted a survey on several diseases of corn in the past from 1978 to 1987 and summarized the results as follows.