Identification of clubroot of crucifers on canola (Brassica napus) in Alberta

Clubroot, caused by Plasmodiophora brassicae, was detected for the first time on canola in Alberta. Galling, typical of the disease, was observed on the roots of canola (Brassica napus) plants in a dozen fields near St. Albert, Alberta. The presence of resting spores of the pathogen was confirmed by...

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Bibliographic Details
Published in:Canadian journal of plant pathology 2005-01, Vol.27 (1), p.143-144
Main Authors: Tewari, J.P, Strelkov, S.E, Orchard, D, Hartman, M, Lange, R.M, Turkington, T.K
Format: Article
Language:English
Subjects:
Brassica napus var. napus
canola
clubroot
crucifers
fungal diseases of plants
pathogen identification
plant pathogenic fungi
Plasmodiophora brassicae
vegetable crops
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Summary:Clubroot, caused by Plasmodiophora brassicae, was detected for the first time on canola in Alberta. Galling, typical of the disease, was observed on the roots of canola (Brassica napus) plants in a dozen fields near St. Albert, Alberta. The presence of resting spores of the pathogen was confirmed by light and electron microscopy. Pathogen spores were isolated from diseased tissue and used to inoculate roots of B. napus 'Westar', on which they produced symptoms similar to those observed in the field. Resting spores were recovered from galls on inoculated plants. The identification of clubroot on the Alberta canola crop is a matter of concern, as the disease is associated with appreciable yield losses and can only be managed with extended intervals between host crops because other management strategies may be too expensive to implement or are of limited effectiveness. Further studies are underway to determine the extent of the problem.
ISSN:0706-0661
1715-2992
DOI:10.1080/07060660509507206