文山州烟草主要根茎病害病原分离与鉴定

Isolation and Identification of Main Tobacco Rhizome Diseases Pathogen in WenShan Prefecture

为了了解文山州烟草主要根茎病害的主要致病原,做好根茎类病害的预测预报与综合防治工作,2006-2007年,在6个县采集烟草病样392个,进行病原菌的检测、分离、鉴定。结果表明:苗期以立枯病为主;团棵期、成熟期的病害均以青枯病为主。青枯病与黑胫病混发比例较高,成熟期青枯病与空胫病混发比例大于20%,不同烟草品种对以上病害存在抗性差异。

From 2004-2006,tobacco root-stem disease survey pathogen isolation were carried out in Yunnan province.In Wenshan prefecture the marjor tobacco plant county,such as wenshan,Yanshan,Guangnan,Xichou and Malipo county.The results showed that the damping off was main was main in the seedling;the tobacco bacterial wilt was main in the rosette stage and in the mature stage.Much plant mixed efffet bacterial wilt and black shank.20% plant mixed effect bacterial wilt and hollow stalk.