三麦赤霉病是我市农民夺取三麦高产稳产的重大障碍。从1951～1984年的34年中,病害流行的有17年,平均5年一次大流行,2～3年一次中等或中等偏重流行年。1984年三麦赤霉病发生仍很突出,晚小麦更是大发生年,自然发病率平均达51.67％,病指27.50。晚小麦连续两年大发生,为历史上所少见。1984年全市药剂防治赤霉病314.07万亩次,占应防治面积的97.8％。其中防治小麦270.89万亩 Three wheat head blight is the city’s farmers to seize three major high yield and stability of the major obstacles. From 34 years of 1951 to 1984, the disease epidemic has 17 years, an average of 5 years a pandemic, 2 to 3 years a medium or medium emphasis on the popular year. The occurrence of Fusarium graminearum was still prominent in 1984, while the incidence of late wheat was even greater. The natural incidence rate was 51.67% on average, and the disease index was 27.50. Late in the year wheat occurred two years, rare in history. In 1984, the whole city took 314.07 million mu of pesticides for preventing and controlling scab, accounting for 97.8% of the area to be controlled. Of which 270.89 million mu of wheat control