近年来,我县玉米丝黑穗病日趋严重。据1977年调查,全县平均发病率为12.3％,其中发病率20％以上的面积占玉米总面积的28％,个别地块竞高达48％。因地制宜地推广拔除病株是切实可行的防治方法。拔除病株应以病雌穗为重点,以花丝萎蔫始期为拔除适期,集中力量在3—5天内完成。 In recent years, my county maize smut is worsening. According to the survey in 1977, the average incidence of the county was 12.3%, of which the incidence of over 20% accounted for 28% of the total area of ​​maize and the individual plots were as high as 48%. Popularization and removal of diseased plants according to the local conditions is a feasible method of prevention and treatment. Removal of diseased plants should focus on the disease of the ear to filaments wilting period for the removal of appropriate period, focused on the power to be completed within 3-5 days.