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How do you control weeds in canola crops?

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Production Value Chain
Sep 14, 2021
Edited By
Jinwoo Cheon
Sep 14, 2021
Edited By
Jinwoo Cheon
Cultural practices, mechanical control, and chemical control are all effective methods for managing weed invasion, with soil tillage being the most effective.

The best weed control practices are tillage, the establishment of a good stand, and weed control in previous crops. Cruciferous weeds (wild radish, wild mustard, pennycress, and shepherd's purse) are nearly impossible to control in the crop.

  • Cultural: As with small grains, the weed control in canola is primarily from the crop itself. Follow all recommended cultural practices to assure a dense vigorous crop that competes well with weeds. Select fields with minimal weed pressure and try to avoid those with weeds in the mustard family.
  • Mechanical control measures cannot be used in canola. A rotary hoe would kill many crop plants and row cultivation is not feasible because of the narrow row spacing.
  • Chemical: Treflan is the only herbicide registered in the United States for use in canola. Treflan and Poast are registered in Canada. Treflan is pre-plant incorporated and gives good annual grass control, but misses ragweed, mustard, and lady's thumb smartweed. Poast is used for postemergence control of annual grasses, quackgrass, and volunteer cereals.


Canola (Rapeseed)

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