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玉米丝黑穗病俗称“乌米”，是豫东地区玉米的主要病害。是由真菌Sphacelocheca reiliana在玉米发芽期侵入的系统侵染性病害，主要受害的是玉米的雌、雄穗。典型病症是雄性花器变形，颖片增生呈叶状，不能形成雄蕊。雄花基部膨大，内为一包黑粉。雌穗受害果穗变短，基部粗大
Corn smut commonly known as “Umi”, is the major disease in eastern Yedi. Is a systemic infestation caused by the fungus Sphacelocheca reiliana, which invades the corn germination period. The main damage is the female and tassel of corn. The typical condition is the deformation of male flower, glume proliferation was leafy, can not form stamens. Male flower base enlargement, within a pack of black powder. Ears spike ears shorter, thick base