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一、根腐病①识别要点主要为害根茎部和叶片。根和茎部出现水渍状软腐而变黑色,腐烂现象明显,植株萎蔫下垂。叶片多从叶尖和叶缘开始,出现暗绿或灰绿色大型不规则水渍状病斑,然后很快变暗褐色。②发生规律由鞭毛菌
First, the root rot ① Identify the main points damage rhizomes and leaves. Roots and stems appeared water stains soft rot and turn black, obvious decay, plant wilting sagging. More leaves from the leaf tip and leaf margin, dark green or gray-green large irregular spots of water stains, and then quickly turn dark brown. The law of occurrence by the flagellum bacteria