Clear patches of canola plants that are yellowing prematurely could be diseased. These are obvious places to start a pre-harvest disease survey. Clubroot continues to spread into new areas, so this disease is one possible cause – even in fields with a clubroot-resistant variety. In addition to the obvious patches, check a few random areas in the better producing parts…
Diseases
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How well do you know your canola stem infections? Take this photo quiz to brush up on the distinguishing features of common stem diseases…
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If you find a patch of canola plants with clubroot galls, take action now to contain it. This is especially important (1) if clubroot is new to the farm or (2) if the field is seeded to a clubroot-resistant (CR) variety and the patch could have a new pathotype that you need to contain…
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Sclerotinia stem rot could be a big problem in areas that started dry then turned wet and stayed fairly moist during and after flowering. The dry start to the season meant a lot of fields didn’t get sprayed with fungicide, even though conditions prior to and following flowering have favoured the disease in those areas…
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To check fields for the presence of clubroot DNA before you see visual symptoms, you can try a random soil test…
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The video includes insight from various Canadian clubroot researchers. It explains what clubroot is, and how to reduce the risk of introducing clubroot to your farm, slow the spread of clubroot when it does arrive, and manage the impact if clubroot is established…