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Hop Black Root‐rot ( Phytophthra citricola Sawada) in England
Author(s) -
Royle D. J.
Publication year - 1968
Publication title -
plant pathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.928
H-Index - 85
eISSN - 1365-3059
pISSN - 0032-0862
DOI - 10.1111/j.1365-3059.1968.tb00413.x
Subject(s) - biology , root rot , rootstock , hop (telecommunications) , outbreak , cultivar , inoculation , horticulture , new england , botany , black rot , computer network , virology , computer science , politics , political science , law
SUMMARY Recent outbreaks of hop black root‐rot in England are described in relation to the disease in New Zealand and to previous records in this country. Rates of growth along detached hop storage roots were compared for several isolates of Phytophthora citricola from hop and other host plants. Isolates from New Zealand hops and recently diseased plants in England could not be distinguished from one another, but the original English isolate, obtained in 1942, appeared to be a distinct strain. A number of commercial cultivars exhibited differential responses to infection by the fungus in both detached root and entire rootstock inoculations. The cultivars Northern Brewer and Progress were amongst the most resistant.