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Diamondback moth and bertha armyworm numbers are fairly low so far this year. Slugs and aphids are a concern for a couple canola growers…
Canola Watch Posts
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Canola fields in eastern Manitoba are showing signs of blackleg infection. The photos below show typical damage. There is no effective fungicide for canola at this growth stage (protective sprays had to be applied early in the season) but growers are encouraged to scout and assess the level of damage before they harvest the crop… -
These upcoming tours and events involve the Canola Council of Canada and/or will cover canola agronomy topics…
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Moist conditions increase the sclerotinia stem rot risk. High humidity (even if it doesn’t rain) can promote apothecia to release higher levels of sclerotinia ascospores. Ideal timing for sclerotinia spraying……
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Peace: Weather has been showery and cool, with temperatures rarely over 20 C. Wind is helping to dry out saturated fields. The north region has still not received meaningful precipitation. Most……
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Fertilizer top dressing right after a hail has been shown in some anecdotal cases to improve canola recovery after a hail, but third party research into this practice is limited. Consider the stage of canola and its chance of recovery before investing in a fertilizer top up…
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Regrowth after hail may extend the flowering period, which also increases the sclerotinia stem rot risk. If yield potential is still high and if conditions favorable to sclerotinia stem rot persist, then a fungicide spray may pay off…
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Even if it doesn’t rain during flowering, high humidity can promote apothecia to release sclerotinia ascospores. Consider that when using the checklist to calculate your sclerotinia stem rot risk… -
A crop needs 40 to 60 frost free days after the start of flowering to reach maturity. That takes us to late August or early September if the crop is flowering today. If a late crop is still two or three weeks from flowering, it is already at high risk of fall frost damage which could negate any economic benefit…
