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为明确重庆市巫溪烟区烟草赤星病病原菌的种类,从重庆市巫溪县通城烟站不同田块采集烟草赤星病典型病斑,分离病原菌并进行鉴定。结果显示,分离到1株优势致病菌株Tb-wx-1,被证明是烟草赤星病病原菌,经对致病菌株的r DNA-ITS区序列进行测序,确定为细极链格孢(Alternaria tenuissima),这是首次在重庆烟区发现细极链格孢引起烟草赤星病。
In order to clarify the types of pathogen of tobacco brown spot disease in Wuxi creek in Chongqing, the typical spot of tobacco brown spot disease was collected from different plots of Tongcheng tobacco station in Wuxi county of Chongqing. The pathogen was isolated and identified. The results showed that Tb-wx-1, a dominant pathogenic strain, was isolated and proved to be the pathogen of tobacco brown spot disease. The sequence of r DNA-ITS was sequenced and identified as Alternaria tenuissima ), Which is the first time that C. elegans was found to cause brown spot disease in Chongqing tobacco smoke.