The distribution and spread of hop latent viroid within two commercial plantings of hop(Humulus lupulus)
作者:
A. N. ADAMS,
A. MORTON,
D. J. BARBARA,
M. S. RIDOUT,
期刊:
Annals of Applied Biology
(WILEY Available online 1992)
卷期:
Volume 121,
issue 3
页码: 585-592
ISSN:0003-4746
年代: 1992
DOI:10.1111/j.1744-7348.1992.tb03468.x
出版商: Blackwell Publishing Ltd
关键词: Epidemiology
数据来源: WILEY
摘要:
SummaryThe distribution and spread of hop latent viroid (HLVd) in two adjacent plantings of the hop cultivars Omega and Wye Challenger have been studied for three seasons. The planting of cv. Omega was heavily infected at the start of the survey and spread was rapid; the density of infection was lower in the planting of cv. Wye Challenger and spread was much slower. It is not known whether the difference in rate of spread was a varietal effect or because of the higher density of infection in the Omega planting. The distribution of known infections in 1991 suggests that plant‐to‐adjacent‐plant spread, either by contact or on tools, does occur. However, the overall distribution of infection and the occurrence of new infections not adjacent to existing ones, suggests that this is not the only means of transmission; whether a vector is involved is not
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