September 14, 2016
We know that tillage will spread clubroot as well as weed seeds and verticillium, but ruts can create headaches for combining, fall spraying and seeding next spring. Working wet fields can also cause compaction…
September 8, 2016
Keep a look out for clubroot, and take care to slow the spread of soil away from these infested areas. This quiz gives you a few numbers to think about…
August 31, 2016
More than 10 clubroot pathotypes have been identified in Alberta, and clubroot-resistant (CR) varieties will not protect against all of them. CR varieties with the same source of resistance grown in a short rotation will quickly select for those pathotypes that are virulent to those varieties. With good moisture for clubroot this year, many fields of CR canola are showing…
July 13, 2016
While scouting canola fields at flowering and podding stages, dig up a few plants in each field and look at the crown and primary root. If the crop has disease symptoms, compare healthy and unhealthy plants. Even if the crop has no outward symptoms, dig up a few plants anyway. Early infection may be present even if the plant shows…
April 27, 2016
Make sure soil is cleaned off any used equipment recently purchased from areas known to have clubroot. This is good biosecurity practice. Ideally, this should be done at the purchase location before bringing it home…
April 6, 2016
CR varieties deployed now to keep clubroot levels low is part of a long-term management approach to keep clubroot from ever reaching yield-damaging levels. CR varieties are recommended if growers are in communities where or near where clubroot is known to exist AND they…
February 3, 2016
Alberta and Manitoba have maps showing the range of clubroot across each province, but the maps are based on different criteria…
February 3, 2016
Think of clubroot like a grass fire. The best way to contain the spread of clubroot is to work diligently outside the hot zone using whatever tools available to keep the “fire” from spreading to your farm. Seeding clubroot-resistant (CR) varieties is a good early action…
December 2, 2015
At least 10 new pathotypes have been discovered in fields in central Alberta. While varieties with improved resistance to 5x may provide a benefit, this resistance may not work on all new pathotypes. Infection from the other virulent pathotypes could still occur…
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