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白菜包心期,常在叶柄基部出现水渍状病斑,引起腐烂、脱帮、露出叶球;严重时叶柄基部和根髓都发生腐烂,从腐烂处流出黄色浓液,并带有恶臭味;病菌沿叶脉扩展,很快引起整株腐烂,即形成烂疙瘩。病菌侵染叶脉后,如果条件不适宜,暂不发病,但被带人菜窖,就会发生烂疙瘩。白菜烂疙瘩其实是由白菜软腐病所致。白菜软腐病是细菌性病害。病菌由伤口或自然裂口侵入。发病适宜温度为25～30℃。一般较长时间干旱后突然下大雨,发病严重。
Cabbage heart phase, often petioles at the base of water-like spots appear lesions, causing decay, help off, revealing the ball; severe petiole and roots of the roots of the rot, effervescence from the decay of the yellow liquid with odor Taste; bacteria along the vein expansion, quickly causing the entire plant decay, that is, the formation of rotten knots. Infectious veins, if the conditions are not suitable, temporarily not affected, but was taken to the cellar, there will be rotten knots. Cabbage rotten pimple is actually caused by cabbage soft rot. Cabbage soft rot is a bacterial disease. Germs invade by wounds or natural rips. The incidence of suitable temperature is 25 ~ 30 ℃. After a long period of general drought suddenly heavy rain, the incidence is serious.