玉米黑粉病是发生普遍、危害较重的一种玉米病害。玉米被害后,生长缓慢,植株矮小,雌穗则结实很少或不结实,严重影响产量和品质。一、症状当玉米黑粉病的病原菌侵入植株地上部份任何幼嫩组织后,病部组织逐渐膨大,产 Corn powdery mildew is a common occurrence, a serious damage to a corn disease. After the corn was killed, the growth was slow, the plants were short, and the ear of the ear was little or not strong, seriously affecting the yield and quality. First, the symptoms When the pathogen of corn powdery mildew invaded the plants above ground any part of the young tissue, the gradual expansion of diseased tissue production