Home / Canola Watch / April 24, 2014 - Alert 1
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New data from the Alberta clubroot disease survey indicates some forms of clubroot resistance are no longer functioning well against a possible new clubroot pathotype in the Edmonton region. Dr. Stephen Strelkov at the University of Alberta has investigated samples collected from several fields and verified higher levels of infection than expected in some clubroot resistant varieties. Further studies are…
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Resistance can lose its effectiveness when repeated cropping of a resistance source selects for individuals within a pathogen population that are virulent on that resistance. Initially, these new pathogen strains are very rare but then increase by being able to attack the "resistant" genotypes…
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Short of a stacked genetics solution and/or the development of several more distinct sources of resistance, which could take a lot of time and effort, we need to follow the risk mitigation practices to help prevent clubroot spread and protect this valuable genetic trait…
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