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Yield loss from hail will depend on crop stage and severity of the damage. In addition to physical injury, hail damage allows a point of entry for diseases such as alternaria black spot and blackleg to infect canola plants…
Canola Watch Posts
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Volunteer canola in the field at this point is a weed that could dramatically impact your canola crops in the future. It may be infected with blackleg or sclerotinia, adding additional inoculum to the field to infect subsequent crops. And it could potentially add thousands of viable seeds and resulting plants that you will need to control in the future…
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Growers with uneven, thin or late canola are struggling with the sclerotinia spray decision, especially if they’ve been without rain or high humidity the past week or so. Uneven crop……
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Peace: The whole region got rain the past week, including up to 6” in places that didn’t need it. Some fields are underwater from corner to corner. On a positive……
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Growers can significantly reduce their volunteer canola seedbank by reducing losses at harvest. Canola losses at harvest can be up to 5 bushels per acre, which is 50 times the typical seeding rate. The Combine Clinic July 18 and 19 (pick one day) in Westlock, Alta., will explain how to reduce harvest losses, putting more yield in the combine tank…
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The sclerotinia spray decision is more complicated for growers with canola stands that are thin, late or at multiple stages. Multi-stage and thin crops that have good yield potential and are fairly well advanced may benefit from a split fungicide application…
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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 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… -
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……
