August 8, 2019 – Issue 19

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  • Canola Watch quiz – How many berthas?

    It’s ‘I spy’ time! This quiz is just one question but too fun to pass up. Train your eye for bertha scouting.

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  • Look for berthas

    The bertha armyworm risk is fairly low across most of the Prairies, but the insect pest is at high numbers in localized areas. These infestations can occur even when adult traps in the area had counts within the ‘low’ risk range, so scouting is recommended everywhere.

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  • New glyphosate-resistant weeds moving north

    Tall waterhemp is confirmed in eastern Manitoba. Palmer amaranth is in North Dakota and moving north toward Manitoba and Saskatchewan. Both are big aggressive weeds with populations resistant to many herbicides, including glyphosate. If you find them, destroy them immediately.

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  • Tips for pre-harvest disease scouting

    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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  • Timing questions: Swathing and pre-harvest aids

    Here are some timing considerations as harvest nears. If swathing: Canola fields swathed at 60% seed colour change (SCC) on the main stem can yield 8% more than fields swathed at 30% SCC. That’s according to Canola Council of Canada research from the early 2000s. The yield difference could be even higher with lower plant […]

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  • Weird podding? Hormone response to drought and heat most likely

    Canola is not a heat-loving crop, and heat during flowering (28°C or more coupled with warm nights) can cause flower abortion (missing pods) or small dead pods. Heat can also cause a hormone response that can result in misshapen pods.

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  • Know product pre-harvest intervals before spraying

    Know the product’s specific pre-harvest interval (PHI) for each crop before applying.

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  • Watch the new clubroot management video

    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.

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