Home / Canola Watch / Diseases / Page 37
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—All areas of the Prairies are at risk. Geography does not provide immunity to this disease. —Prevalence of sclerotinia stem rot has a direct correlation to above-average moisture. If a field has regular rains or high humidity or both from two weeks before flowering and through flowering, then infection will occur. If these conditions continue after flower, severity of the…
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This calendar shows you the major pests and problems to look for in canola at each point in the season…
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Growers who do not have the time for timely scouting may want to hire an agronomist to support their own scouting program. Most agronomists are also pressed for time, and may not be able to spend one to 2 hours a week scouting each canola field, but agronomists can supplement the time growers spend scouting, and provide experience and skills…
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Sclerotinia and blackleg remain the top two most important canola diseases, but aster yellows are a hot topic after a bad year in 2012. The Canola Council of Canada agronomy team came up with the following 10 questions about aster yellows. Chrystel Olivier, research scientist with Agriculture and Agri-Food Canada in Saskatoon, answered them the best she could given what…
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A long fall provides a few extra weeks to look back on the year that was — to reassess plant stands, fertilizer rates and disease levels. A long fall also gives growers an opportunity to control weeds and distribute residue in fields planned for canola in 2013…
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High levels of blackleg have been found in some canola fields this year. Quite likely blackleg was present the last time canola was grown on these fields but went undetected based on a lack of obvious yield losses. Just before or while swathing are the best times to check plants for blackleg and other diseases. Uninfected parts of the plant…
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Growers and agronomists may be able to find clues to explain lower yields by looking at the plants, pods and seeds. Did the pods form? Did pods fill properly? Are seeds there but small or shriveled? Read more to see what these may mean, and what can be done to reduce these losses next year…
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Pre-harvest is a good time to scout for disease severity. The photo above shows severe sclerotinia infection. This article includes sclerotinia and various other diseases to look for…
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When doing their own disease surveys, growers may find it easier to check crops while swathing. Stop at five random spots in the field while swathing and check 20 standing plants at each spot. This will give you a good idea how much of the field actually had sclerotinia or blackleg or clubroot, for example…
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