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１９９８年小麦白粉病的流行危害与常规年份具有较大的差异，表现在秋苗的感病率高；春季发病时期早，扩展速度快；中后期病情稳定期推迟，流行时间长，最终危害加重。分析原因主要是适宜发病的湿度时间加长，雨日雨量加大，另外田间高密度群体和高湿度生境也给病菌提供了良好的增殖条件。小麦白粉病的综合防治要以栽培调控和种子处理为基础，推广全程化学控制技术。
The prevalence of wheat powdery mildew in 1998 was significantly different from that of conventional years, showing the high prevalence of autumn seedlings, early onset of spring and rapid expansion, postponement of stable disease in the middle and late stages, prolonged prevalent epidemic, and increased endangerment . The main reason for the analysis is that it is suitable for prolonging the humidity of the disease and increasing rainfall on rainy days. In addition, the high density population and high humidity habitat in the field also provide good propagation conditions for the bacteria. The comprehensive prevention and control of wheat powdery mildew should be based on the cultivation control and seed treatment, promote the whole chemical control technology.