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dc.contributor.authorPeng, G.
dc.contributor.authorLahlali, R.
dc.contributor.authorPageau, D.
dc.contributor.authorHwang, S.F.
dc.contributor.authorHynes, R.K.
dc.contributor.authorAnderson, K.
dc.contributor.authorMcDonald, M.R.
dc.contributor.authorGossen, B.D.
dc.contributor.authorStrelkov, S.E.
dc.contributor.authorTurkington, K.T.
dc.contributor.authorFalk, K.
dc.contributor.authorYu, F.Q.
dc.contributor.authorMcGregor, L.
dc.contributor.authorHupka, D.
dc.description.abstractThis study was conducted to assess additional strategies potentially complimentary to cultivar resistance or biocontrol in control of clubroot. New granular Bacillus subtilis formulations and a seed dressing method were developed to facilitate biofungicide delivery in field trials. The granular formulations were applied in furrow during seeding at 50 kg/ha to a clubroot resistant (CR) and susceptible (CS) canola cultivar, respectively, in three field trials. The seed dressing applied approximately 1×105 to 5×106 cfu/seed doses of the biocontrol agent, and was evaluated on the CS cultivar seeded to different crop-rotation scenarios where the plots had a 1-year, 3-year, or 11-year break from last canola crop. Clubroot disease pressure was high at all trial sites with disease severity indexes (DSI) ranging from 69% to 98% on the CS cultivar. None of the granular formulations reduced clubroot substantially, whereas the CR cultivar showed a high effect, reducing DSI to below 15% and doubling the yield over that of CS cultivar. Plots of varying rotation showed a pattern of clubroot pathogen pressure, with those of 1-year break from canola being the highest. The DSI for all rotational scenarios was high, reaching 100% in short-rotation plots. Biofungicide seed dressing did not reduce DSI, but longer crop rotation often reduced gall size slightly, showed much milder above-ground damage, and increased the yield significantly relative to short rotation in two separate trials. Even a 3-year break from canola was highly beneficial, with the yield doubled as opposed to that with only 1-year break from canola.en_US
dc.relation.ispartofSoils and Crops Workshop
dc.rightsAttribution-NonCommercial-NoDerivs 2.5 Canada*
dc.titleUse of cultivar resistance and crop rotation with Bacillus subtilis for clubroot control in canolaen_US
dc.description.versionNon-Peer Reviewed

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Attribution-NonCommercial-NoDerivs 2.5 Canada
Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivs 2.5 Canada