一、病症 姜的根、茎、叶均可发病,一般多在近地面的茎基部和根茎上半部先发病。发病初期,叶片卷缩,萎蔫下垂,失去光泽,最后变黄干枯早落,迅速蔓延到全田。受害根茎部病斑先呈水渍状,黄褐色,细胞散离,内部组织逐渐变软腐烂,并流出具有臭味的灰白 First, the symptoms of ginger root, stem, leaves can be disease, usually more in the ground near the base of the roots and rhizome first onset. Early onset, the leaves curling, wilting drooping, tarnished, and finally yellow dry early fall, quickly spread to the whole field. Injured rhizome lesions first water-like stains, brown, scattered cells, the internal organization becomes soft and rotten, and out of the smell of gray