Clubroot Control

What is Clubroot of Canola


Clubroot is a serious soil-borne disease of crucifer crops. The crucifer family includes vegetable crops like cabbage, broccoli, and cauliflower as well as field crops such as canola and mustard. Clubroot attacks the root system of these plants and restricts sufficient water and nutrients for above ground plant parts.

How does the Disease Spread?

- 6.3 million spores per gram of soil.
Clubroot can only spread through resting spores in the soil. These resting spores are most likely to spread by contaminated soil carried from field to field by equipment, but can also be contributed to movement of soil by water & wind erosion, soil in hay or straw, wildlife and humans.

Regulatory Status


Clubroot was added as a declared pest to the Agricultural Pests Act in April 2007. The owner or occupant of land has the responsibility of taking measures to prevent the establishment of any pest on land, property and livestock, and to control or destroy all pests on the land or property. Enforcement of pest control measures is the responsibility of the municipal authority Kneehill County ASB. By virtue of the office, the Agricultural Fieldman is a pest inspector under the Agricultural Pests Act. Pest inspectors have the power to enter land at any reasonable hour, without permission, to inspect for pests and collect samples.

Clubroot Control


Control measures for Clubroot are specified in the Alberta Clubroot Management Plan. It is important to understand that these control measures represent an acceptable minimum standard that is to be applied in all municipalities across the province. Municipalities, however, can adopt more stringent standards within their own jurisdictions.

Kneehill County Agricultural Service Board (ASB) Clubroot policy provides control measures in Kneehill County.

For more information contact the ASB office at 443-5541 or toll free 1-866-443-5541

Links to Additional Information

Clubroot of Canola - Frequently Asked Questions
Alberta Clubroot Management Plan

Clubroot Disease of Canola and Mustard has good pictures of infected roots.
Best Management Practices for Disinfecting Farm Machinery
Canola Council of Canada maintains clubroot information on clubroot