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沙姜细菌性软腐病是一种具有毁灭性的病害,发病率10—80%不等,严重阻碍沙姜生产的发展.根据广西各地采样分离的细菌,在形态、染色反应、培养性状、生理生化等方面与番茄青枯病菌比较相似,初步证明.沙姜细菌性软腐病菌是青枯病假单孢杆菌(Pseudomonas solanacearum(Smith)smith)沙姜细菌软腐病菌为害沙姜的肉质根、块茎和叶片.肉质根受害初为黄褐色,后变灰黑色软腐;块茎受害,表面无异常变化,剖开姜块,可见内部维管束变褐色,发病严重时,姜肉变暗褐色软烂甚至分解成糊状,只剩下沙姜皮.受害组织无特殊臭味;叶片受害呈水渍状湿腐.当天气晴朗时,病株叶片卷缩、蔫萎.沙姜细菌性软腐病一般在4—10月份发生,6～8月为盛发期.本文主要报告病原细菌的鉴定结果.
Sha Jiang bacterial soft rot disease is a kind of devastating disease, the incidence of 10-80% range, seriously hindered the development of sand ginger production.According to the bacteria isolated and sampled in Guangxi, morphology, staining reaction, culture traits, Physiological and biochemical aspects and so on are relatively similar to tomato wilt disease bacteria, preliminary proofs .Sambung ginger bacterial soft rot bacteria is bacterial wilt of Pseudomonas solanacearum (Pseudomonas solanacearum (Smith) smith) Tubers and leaves. Fleshy root damage at the beginning of the brown, after the gray-black soft rot; tuber damage, no abnormal changes in the surface, cut open the ginger block, visible internal vascular bundle brown, serious disease, dark brown softened ginger And even break down into a paste, leaving only the ginger skin.The victim tissue no special odor; leaf damage was wet water stains.When the weather is sunny, the diseased leaves curling, wilting .Salmum bacterial soft rot general Occurred from April to October, 6 to August for the Shengfa period.This paper reports the identification of pathogenic bacteria.