广西烟草病毒病病原鉴定

IDENTIFICATION OF THE CAUSAL VIRUSES OF TOBACCO IN GUANGXI

1989—1991年,调查了广西19个县(市)的烟草病毒病样本117份.经综合鉴定,病原病毒有烟草花叶病毒(TMV),黄瓜花叶病毒(CMV),烟草曲叶病毒(TLCV)、烟草环斑病毒(TRSV),烟草蚀纹病毒(TEV)、马铃薯Y病毒(PVY)和一种属PVY组的烟草脉绿病毒(暂定为TVGV)等7种.其中,CMV分布最广,发生最多,单独和混合浸染占总样本数的88.16%,是当前广西烟草上最主要的病毒病害.TLCV已在11个县(市)有发现,侵染样本数占总样本数的10.25%,局部地区的发病率高达52.5%,已成为广西烟草生产上的潜在威胁.其余5种烟草病毒病原只在个别县发生,侵染的样本数也较少.

Based on symptoms reaction on indicator plants, serology reaction, transmission, morphology and size of virus particles, 7 types of tobacco virus were identified preliminarily. They were CMV, TMV, PVY, TLCV, TRSV, TEV and a PVY group virus named as tobacco vein-greening virus (TVGN) temporarily. Among them, CMV was the most important virus in Guangxi, its single and mixed infection acounted for 88.16 percent in 117 virus samples collected from 19 counties (cities) of Guangxi. TLCV was becoming a potential danger to the production of tobacco, it was found in 11 counties (cities) that its single and mixed infection were 10.25 percent of the total number of samples; in some regions, the average incidence reached 52.5%. The distribution and ratio of the other 5 viruses were fewer.