Agronomy Library > Disease

Clubroot Disease of Canola and Mustard
Author: Murray Hartman, Alberta Agriculture & Food
Date Created: May 11, 2007
Last Reviewed: August 10, 2007

Clubroot is a serious soil-borne disease of cruciferous crops (canola and cabbage family) worldwide and was first identified in Europe in the thirteenth century. This disease is a major problem in cole crops (cruciferous vegetables) in some areas of British Columbia, Quebec, Ontario and the Atlantic provinces.

There have been two previous reports of clubroot in cole crops in Alberta. So, clubroot is not a new disease in Canada or Alberta. However, in 2003, clubroot was confirmed in several canola fields near Edmonton, Alberta, which was the first report on canola in western Canada.

Clubroot has continued to spread in the Edmonton area, mainly in the counties of Sturgeon, Parkland, Leduc and Strathcona.

The disease can affect broccoli, Brussels sprouts, cabbage, cauliflower, Chinese cabbage, kale, kohlrabi, radish, rutabaga and turnip. Canola/rapeseed and mustard are also susceptible to this disease. There are several weak, non-cruciferous hosts, but their contribution to disease development and carryover of the clubroot pathogen is not well known.

Clubroot was added as a declared pest to Alberta’s Agricultural Pests Act (APA) in April 2007. The APA is the legislative authority for enforcement of control measures for declared pests in Alberta. The Minister of Alberta Agriculture and Food is responsible for this Act.

However, enforcement of pest control measures is the responsibility of the municipal authority, and Agricultural Fieldmen are responsible for enforcing pest control measures in their municipalities. Pest inspectors have the power to enter land at a reasonable hour, without permission, to inspect for clubroot and collect samples. The owner or occupant of the land has the responsibility for taking measures to prevent the establishment and spread of clubroot.

This factsheet contains current information about clubroot in canola and describes options for Canadian canola growers to prevent this disease from being introduced and becoming well established in their fields. 

click here for the complete online & PDF factsheet on the Alberta Agriculture & Food website

click here for the Alberta Clubroot Management Plan on the Alberta Agriculture & Food website