北票地区是我国玉米的重要产区之一,种植面积较大,因受气候、环境、轮作、种子质量等影响,玉米黑粉病害每年都有发生,因病减产率最高可达3成。查清黑粉病发生的原因,积极的做好防治工作,减轻病害造成的减产,利于农民增收。1黑粉病症状玉米黑粉病又叫瘤黑粉,是局部侵染性病害,侵染时间长,玉米苗期至成熟期均可侵染。玉米的雄穗、果穗、气生根、茎、叶、鞘、腋芽等到部位均可生出肿瘤,但形状和大小变化很大。肿瘤近球形、角形、棒形、 Beipiao area is one of the important producing areas of China’s maize. The planting area is relatively large. Due to the influence of climate, environment, rotation and seed quality, the occurrence of corn black powder disease occurs annually, and the rate of yield reduction can reach as high as 30%. To find out the reasons for the occurrence of smut, and actively prevent and control work to reduce the disease caused by the cut, which will help farmers to increase income. 1 Smell disease Symptoms Corn Smell disease, also known as tumor black powder, is a localized infectious disease, a long time of infection, maize seedling to mature stage can be infected. Maize tassel, ear, air roots, stems, leaves, sheaths, axillary buds can produce tumors until the site, but the shape and size vary greatly. Tumor nearly spherical, angular, rod-shaped,