Clubroot Disease

About Clubroot

Clubroot is a serious soil-borne disease of cruciferous plants, such as canola. In canola, it causes swellings or galls to form on the roots, which ultimately causes premature death of the plant. It is caused by a fungus-link protist called Plasmodiophora brassicae.

The Provincial Plant Disease Specialist and a Crops Extension Specialist with Saskatchewan Agriculture walk you through how to scout for clubroot in your canola fields.

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The key to clubroot management is to keep spore levels as low as possible.

To do this, clubroot needs to be managed through an integrated approach. In any field, clubroot management will be effective in minimizing the spread and severity of clubroot.

Further clubroot management strategies are advisable when spore levels are high or when you feel a higher level of caution is warranted.

Best Practices for Prevention and Management of Clubroot

  1. Practice a crop rotation
    • ​​​​​​​​​​​​​​3-year rotation is optimal
  2. Prevent spread of soil
    • ​​​​​​​field where clubroot has not been confirmed: rough clean equipment before leaving each field
    • field where clubroot has been confirmed: completely remove all soil and sanitize equipment before leaving
    • fieldwork in clubroot infested areas is carried out last
    • clubroot positive fields have separate entrance and exit, with a grass patch at the exit for equipment cleaning
  3. Weed control
    • control canola volunteers and susceptible weeds
  4. Monitoring
    • monitor all canola crops for visible symptoms, including clubroot resistant varieties
  5. Contain infested areas
    • seed clubroot infested areas to a sod-forming grass
    • treat clubroot infested area with lime to increase pH

This video focuses on key management strategies to minimize the risk of introducing the disease-causing pathogen to your farm, slowing the spread of it within your farm if it arrives, and using a multi-pronged approach to reduce the impact from it once the pathogen has been established. Video funded by the AB, SK, and MB canola grower groups.

Developed by the Saskatchewan Clubroot Initiative – last updated August 2019

Monitoring Clubroot in Saskatchewan

*Reminder for Saskatchewan farmers who requested a clubroot soil test from SaskCanola that the deadline to deliver completed soil tests to Discovery Seed Labs in Saskatoon is June 30, 2020. SaskCanola is covering the cost of each test ($100 value) to help determine where clubroot is located in the province. With clubroot’s potential to negatively impact the canola industry, this is a very important investment for SaskCanola to help farmers prevent further spread of the disease. 

Last updated March 2020

Reporting a Clubroot Field in Saskatchewan

Information coming soon!

Clubroot Research

Key Result – Bleach is most effective in killing clubroot spores at concentrations above 1.7%. Spray Nine was almost as effective, while 5 other products achieved greater than 95% control.

For more information on clubroot:

- visit clubroot.ca
- visit the Saskatchewan Ministry of Agriculture’s website at saskatchewan.ca/crops
- contact a Plant Health Officer
- contact the Agriculture Knowledge Centre general inquiry line toll-free at 1-866-457-2377 or email aginfo@gov.sk.ca

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