玉米丝黑穗病俗名为火焰苞、灰苞等，常危害玉米雌穗（果穗）和雄穗（天花），一旦发病，通常全株无一实粒。受害的果穗臃肿膨大，无花丝，除苞叶外，全部果穗变成一团黑粉，而外观完好，不易识别；雄花受害，变成“黑羊尾”，内为黑粉，无法扬花授粉。此病主要由土中病菌... Corn smut disease known as the flame bud, gray bud, etc., often endanger corn ear (ear) and tassel (smallpox), once the onset, usually whole plant without a grain. The affected ear bloated swollen, no filaments, in addition to bracts, all the ears into a mass of black powder, and the appearance of intact, not easy to identify; male flower victims, become “black sheep tail”, the black powder, can not pollination. The disease is mainly caused by soil bacteria ...