许昌市2006年玉米青枯病大流行成因及防治对策
Agriculture of Henan（2007）
Abstract
<正>一、症状玉米青枯病多在玉米灌浆期开始发病,乳熟末期至蜡熟期为显症高峰。植株感病后,叶片自下而上迅速枯死,呈青灰色青枯,似霜冻危害;根系和茎基部,局部产生淡褐色水渍状病斑,并逐渐变为褐色腐烂状;茎基部三、四节
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