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一、番茄青枯病。又叫番茄枯萎病,是细菌病害,苗期极少发病,多在移栽后苗高至30厘米开始感染。发病初期顶端叶片逐渐萎蔫下垂,随后下部叶片凋萎;最后中部才凋萎。病株一般有白天凋萎、傍晚恢复的醉日现象,若遇湿度大,病茎产生不定根有茎瘤现象。干燥时3—5内死亡,死亡后叶片仍青绿。病株纵切面可见维管束变褐色,用手挤压切口处,有乳浊状菌浓溢出。此病在高温多湿或雨后转晴气温突增、幼苗纤弱、多年连作、中耕伤根,低洼渍水、土壤偏酸都能诱发流
First, tomato bacterial wilt. Fusarium also known as tomato disease, is a bacterial disease, rare disease at seedling stage, and more in the transplanting height of 30 cm after the start of infection. Early onset of the top leaves gradually wilting sagging, followed by the lower leaves withered; the last withered wither. Sick strains generally withered during the day and evening drunk resumption of the phenomenon, in case of humidity, stems have adventitious roots have stem tumor phenomenon. When dried within 3-5 deaths, the leaves are still green after death. Sick strain visible vascular bundle brown, squeeze the incision by hand, with opacity thick overflow. The disease in the high temperature and humidity or sunny weather after the sudden surge in temperature, seedling weak, continuous for many years, cultivating roots, low-lying water, acid soil can trigger induced