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Effects of dazomet on clubroot and root rot of canola.

Hwang, S.F., Ahmed, H.U., Strelkov, S.E., Zhou, Q., Gossen, B.D., McDonald, M.R., Peng, G., and Turnbull, G.D. 2017. Effects of dazomet on clubroot and root rot of canola. Can. J. Plant Pathol. 39: 99.

Abstract

Experiments were conducted to examine the effectiveness of dazomet (trade name Basamid) in presenting infection of canola (Brassica napus L.) by Plasmodiophora brassicae Wononin. Greenhouse studies showed that seedling emergence and plant height increased, and infection (both primary and secondary) and clubroot severity decreased with increasing rates of dazomet pre-treatment of P. brassicae-infested soil. Under field conditions, clubroot incidence was reduced and yield increased with increasing dosage of dazomet. However, seedling emergence, root mass and seed yield were reduced, especially at 400-800 kg ha^-1. Dazoment also increased emergence, plant survival and plant biomass in P. brassicae-infested soils that were inoculated with the soil-borne pathogens Fusarium avenaceum (Fr.) Sacc., Pythium ultimum Trow and Rhizoctonia solani Kuhn. These results indicate that dazoment may be an effective tool for manipulation of both clubroot and seedling blight of canola.

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