August
2007
, Volume
91
, Number
8
Pages
1,034
-
1,044
Authors
S.
Werres
and
S.
Wagner
,
Federal Biological Research Center for Agriculture and Forestry, Institute for Plant Protection in Horticulture, Messeweg 11/12, D-38104 Braunschweig, Germany
;
T.
Brand
,
Chamber of Agriculture Niedersachsen, Hogen Kamp 51, D-26160 Bad Zwischenahn, Germany
;
K.
Kaminski
,
Federal Biological Research Center for Agriculture and Forestry, Braunschweig, Germany
; and
D.
Seipp
,
Chamber of Agriculture Niedersachsen, Bad Zwischenahn, Germany
Affiliations
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RelatedArticle
Accepted for publication 27 March 2007.
Abstract
ABSTRACT
Phytophthora ramorum was studied in an open air simulation system with nine separate container stands each connected to its own water collection system. The water in these reservoirs was inoculated with P. ramorum and then used for overhead irrigation over the course of the season to study the spread of the pathogen and development of P. ramorum blight in Rhododendron and Viburnum spp. P. ramorum could infect plants through the use of contaminated irrigation water, with the maximum amount of infection of Rhododendron spp. less than 19%. In the 2 years of the study, symptom onset occurred 8 and 16 days, respectively, after water was first inoculated. The disease rate proportion of infected plants developing symptoms varied with year and season. In both years, the pathogen was detected in the water reservoirs over the course of the growing season.
JnArticleKeywords
Additional keywords:
disease symptoms,
latent infection,
nursery
Page Content
ArticleCopyright
The American Phytopathological Society, 2007
