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Canola Council of Canada

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Weeds

The following articles are categorized as 'Weeds'

• Control cleavers, volunteer canola in cereals

  Cereal crops in rotation provide canola growers will another opportunity to control cleavers, volunteer canola and other tough weeds to reduce the threat to next year’s canola. Volunteer canola control also reduces build up of clubroot and blackleg inoculum.

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• Cleaning out the sprayer tank — tips

  Cleaning out the sprayer protects a sensitive crop, it protects people working with the sprayer, and it protects the sprayer and its components. The following article by AAFC’s Tom Wolf provides some handy tips.

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• 12 tips for better spraying results

  Here are a few key tips to lure you in: Spraying at the right time is more important than how you do it. Choose a herbicide that can handle large droplets. Keep your boom low. Read on for more tips and details.

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• Tips to control hard-to-wet weeds

  For weeds that do not “wet” easily avoid using very coarse droplets, and use high water volumes.

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• Flush sprayer tanks properly between products

  A water rinse is not usually enough to remove herbicide residue from the sprayer system. Herbicides can bind to the tanks and hoses, and most need water plus a cleaning solution to remove them. If not, you never know when the bound herbicide molecules will be released.

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• Spraying a multi-stage crop

  When canola is at multiple stages within one field and when weeds are at multiple stages, it can be a challenge to choose the right spray timing. The key is to assess the stage that represents the majority of canola plants.

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• Herbicide carryover can stop emergence

  Seedlings that curl up and start to brown off before emergence could be infected with seedling disease. But they could also be damaged by herbicide carryover. If you suspect herbicide damage, here are two hints that soil herbicide carryover may be the cause:
  —Residual herbicide has been used on the field before.
  —Symptoms appear worse on hilltops or valleys.

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• Management for a thin stand

  Step one with a thin stand is to determine the cause so it can be prevented next year. Step two is to scout closely and take extra care to protect those few plants from insect damage and weed competition.

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• Spraying tips for 2011

  Timely spray is more important than nozzle choice. AAFC research showed that spraying 7 days after crop emergence generated higher yields than spraying 17 days after emergence, no matter the droplet size. Using a low drift nozzle early was better than waiting longer for a relatively calm day to use a finer spray. Read the whole article for more tips from Tom Wolf’s webinar.

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• Aerial options for weed control

  Weeds are getting out of control on some unseeded and seeded fields too wet for the ground sprayer. This is especially true on fields that didn’t get a pre-seed burnoff. Aerial spraying may be the best option even at this early stage of the crop. This article has options for aerial herbicide application in canola.

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