Diseases-general-other

  • Pre-harvest scouting: 8 diseases

    Diseases-general-other

    Sclerotinia stem rot. Credit: Justine Cornelsen

    Check patches of pre-mature ripened canola to identify the cause. It could be blackleg, clubroot, sclerotinia stem rot (pictured) or something else entirely. Here’s how to identify the major diseases of canola as fields get close to swathing stage…

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  • Scouting those sickly patches

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    Patches that seem to be maturing early while the rest of the crop is still green do warrant closer inspection. With all the rainfall in some areas, die-off due to excess moisture could be the prime suspect — but check anyway. It could be disease.

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  • July 13 Quiz – Lesions

    Diseases-general-other

    Sclerotinia_lesion_Hewson600

    How well do you know your canola leaf lesions? Take the quiz to find out! (Photo credit: Angel Hewson)

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  • Hail on flowering canola

    Diseases-general-other

    Hail damage at mid to late flower can result in high yield losses. If trying a rescue treatment, check that there is leaf area to take up the treatment, and that the crop has any chance of recovery.

    The later hail occurs in the season, the more damage it can do to yield. That said, flowering canola can, with enough time, recover from hail that knocks off a large percentage of flowers.

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  • Novel products: Run your own tests

    Diseases-general-other

    Rescue treatments for hail, excess moisture and other stress factors are rarely tested in broad scientific studies. Growers considering these treatments have to remember the decision comes down to “buyer beware”.

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  • Use rain delays to check disease levels

    Diseases-general-other

    Clippers for cutting stems to check for blackleg.

    Crop rotation and seed decisions are improved when growers and agronomists have a good handle on the disease situation. Blackleg levels were higher than expected in some areas this year, and clubroot continues to spread. Knowledge of the incidence and severity of these two diseases provides an important head start in keeping them under control.

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  • Verticillium wilt and other unusual sightings

    Diseases-general-other

    Verticillium wilt in canola. Credit: MAFRD

    Verticillium wilt was found in a canola field in Manitoba in 2014, and a survey of approximately 1,000 fields across Canada is underway this summer and fall.

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  • Top 10 things to scout after swathing two rounds

    Diseases-general-other

    With a low plant population, canola will grow bigger with more branches.

    Tangled mature canola fields can be hard to scout. Swathing two full rounds before scouting makes it much easier to quickly check a number of plants in a few areas — including the back of the field. Here are things to look for….

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  • Crop protection products and international markets: What you need to know

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    When it comes to maintaining Canada’s reputation as a high quality canola supplier, everyone in the canola value chain has an important role to play.

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  • Keep it Clean: PHI and storage tips

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    When spraying, stick to the pre-harvest interval unique to each product. When prepping bins, follow canola storage recommendations….

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  • Keep it Clean, keep the customer happy

    Diseases-general-other

    Canada exports 90% of the canola we produce, and our global customers won’t accept anything less than squeaky-clean seed. This time of year, the keys are to ensure a crop protection product applied won’t cause concern for canola exporters, and to know a product’s required interval between application and swathing.

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  • Spraying a multi-staged crop

    Diseases-general-other

    Many canola crops have plants at multiple stages of growth. This field was reseeded due to frost, but some of the originals survived.

    Crop staging comes into play for herbicide, insecticide and fungicide timing. So crops with plants at various stages — some at flowering, some barely at the bud stage, for example — present a challenge when deciding when to spray.

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  • Rotations and risk management

    Diseases-general-other

    Blackleg disease rating: 2

    Scientific research in Western Canada has identified three factors that increase the risk of canola yield loss in short rotations. They are blackleg (shown above), clubroot and cabbage root maggot.

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  • Leave required time between spraying and cutting

    Diseases-general-other

    spraytoswathscreenshots

    Pre-harvest interval (PHI) refers to the amount of time that must lapse (in days) after a pesticide application before the crop is cut. Cutting refers to swathing or straight combining. Each crop protection product has its own PHI, and the PHI for a specific product often vary by crop.

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  • Disease diagnostics

    Diseases-general-other

    cw2-image-diseases-blackleg-field-lodging-severe-1-hammondd

    Seeing signs of canola disease but you don’t know what it is?

    Read this article: Disease to look for while harvest scouting.
    Watch this video: CCC pre-swath disease scouting video.
    Use the Canola Diagnostic Tool

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