Barb Ziesman, A.Ag
Provincial Specialist, Plant Disease
Kaeley Kindrachuk, AT
Crops Extension Specialist
Clubroot is an important soil-borne disease of canola and other brassicas that can cause yield losses of 50 per cent or greater under extreme conditions. Yield loss will be highest when pathogen levels are high, a susceptible crop is grown and when environmental conditions are favourable for disease development. Low pathogen levels will result in smaller galls, or swollen root tissue, which will have a reduced impact on yield. Clubroot is easiest to manage when low levels of the pathogen are detected and an integrated approach is used that includes extended crop rotation, clubroot resistant varieties and prevention activities. We can take a DNA-based soil test in order to detect the pathogen at low levels, before we start finding the Clubroot disease in the field. In addition to taking a soil test, we should also be looking for galls on the roots of canola plants or other brassica host crops each time we enter a field.
In this video, we explain how to take a soil sample to test for Clubroot, how to scout for visual symptoms, and what Clubroot will look like if it’s found on the plant.
If you would like more information on Clubroot, visit www.clubroot.ca, or our Clubroot Overview webpage.