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Scientific research in Western Canada shows lower yields for canola in short rotations. Blackleg (shown above), clubroot and many other factors can cause this yield loss…
Rotations and risk management
January 13, 2021
Blackleg
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Blackleg: Scouting, identification and next steps
August 19, 2020
Around 60 per cent seed colour change (swath timing) is the best time to scout for blackleg as the basal cankers, which cause significant yield loss, are easy to see. Check fields – even if growing resistant (R) rated hybrids. An R rating is not immunity and does not tell much about if it will be effective against the races…
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Give the plants a mid-season root check
July 15, 2020
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 above-ground symptoms, compare the roots of healthy and unhealthy plants. That might help you discover the problem…
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Last chance for blackleg control
June 10, 2020
Fungicide is probably not necessary in a field with at least a two-year break between canola crops, blackleg-resistant varieties and rotation of genetics. But if factors suggest a fungicide ROI, it has to be applied before the four-leaf stage…
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Do you need to change blackleg resistance for 2020?
September 11, 2019
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The risks from high canola frequency
March 1, 2019
Scientific research in Western Canada has identified three factors that increase the risk of canola yield loss in short rotations. They are blackleg, clubroot and cabbage root maggot. Clubroot will drive the need for longer breaks between canola crops on more and more farms…
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Interpreting blackleg race ID test results
February 8, 2019
Step 1. Sample Collection The ideal time to pull and assess plants for blackleg infection is at 60% seed colour change, which is around swath timing. Plants should still be……
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When is 'too late' to assess stubble for blackleg?
September 26, 2018
Field observations suggest that blackleg may be increasing in some areas. Official disease survey results for 2018 will be announced at Western Forum October 17-19. In the meantime, farmers and agronomist may still have time to count the percentage of plants that are diseased…
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Test blackleg races in a field; make better seed decisions
September 6, 2018
New tests allow farmers to identify the blackleg races in their fields. With this information, farmers can choose canola varieties with resistance to those races…