Home / Canola Watch / Blackleg / Page 6
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The window to control disease in canola is closed, so why scout? Well, because the period from podding to harvest is the easiest time to see diseases. And if you can identify which diseases are present, you can adjust your variety choice, crop rotation and fungicide use for subsequent years…
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If your crop history and crop scouting suggest high risk for blackleg, consider fungicide as an additional tool to limit infection and yield loss. Headline and Quadris are available for blackleg management in canola…
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Growers in areas where blackleg infection was known to cause yield loss last year may choose to apply fungicide early in the season. Here are factors that increase the blackleg risk. The more of these risk factors that apply, the greater the risk:
—Tight canola rotation
—Using the same variety in the rotation
—Yield loss to blackleg in previous years…
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Keys to blackleg management: 1. Assess your risk and avoid planting into a high risk situation. 2. Add diversity to your operation by rotating crops, canola varieties and fungicides. 3. Learn to identify blackleg and assess disease levels in your fields…
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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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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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Pre-harvest is a good time to scout for disease severity. Fields with lots of diseased plants may also be poorer candidates for straight cutting due to the increased shattering risk. Read more for tips on how to identify blackleg, sclerotinia and alternaria…
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Some regions are reporting higher rates of blackleg (shown above) and most regions are seeing sclerotinia stem rot damage. Fungicide is not effective at this stage of the season, but the weeks leading up to harvest are a good time to scout. Its important to know which disease is present in order to plan rotations and varieties for next year…
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Sclerotinia could be bad this year but the window to apply fungicide has closed for most crops. Rhizoctonia foot rot, shown above, may explain some toppling plants. The weeks leading up to harvest are a good time to scout for blackleg and clubroot…
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