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Group 6 & Group 27


Get a new mode of action pre-seed for a new level of certainty.

To help maximize canola yield potential, you need to put the smackdown on weeds early. Certitude® herbicide is the pre-seed solution that provides exceptional control of challenging weeds like kochia and volunteer canola. And as the first Group 27 chemistry that's registered for pre-seed use in canola production, it also helps to mitigate herbicide resistance, sharpening your glyphosate application.

Delivers exceptional pre-seed weed control of herbicide-resistant kochia and volunteer canola. And as the first Group 27 herbicide for pre-seed use in canola, it helps manage herbicide resistance.

  • The first Group 27 herbicide developed for pre-seed use in canola production
  • Exceptional control of herbicide-resistant kochia and volunteer canola
  • Consistent control with both contact and systemic activity

Labels & SDS



Applicable On


Labels & SDS

Additional Resources



Benefits of Certitude

  • Certitude contains the active ingredients topramezone (Gr 27) and bromoxynil (Gr 6), to provide both contact and systemic properties.
  • Certitude drastically improves the management of tough-to-control weeds such as kochia and volunteer canola, including glyphosate-resistant biotypes.
  • Certitude controls group 2, 4, and 9 resistant biotypes of kochia, which makes it a great tool for resistance-management and sustainability.
  • Certitude helps to sharpen the performance of glyphosate on challenge weeds such as kochia, volunteer canola, and wild buckwheat.  

Performance Trials

Volunteer canola control: Certitude vs. competitors

Volunteer canola control: Certitude vs. competitors graph

Kochia control: Certitude vs. competitors

Kochia control: Certitude vs. Competitors graph

Product Info & Application Guide

Weed Management1

Broadleaf weeds up to the 4-leaf stage (except where indicated)

Cow cockle2
Lady's thumb
Lamb's quarters (up to 15 cm in height)
Narrow-leaved hawk's beard
Redroot pigweed
Russian thistle
Volunteer canola (up to 6-leaf stage)
Volunteer flax
Wild buckwheat
Wild mustard2

Grassy weeds up to 4 leaf

Barnyard grass
Downy brome
Green foxtail
Volunteer barley
Volunteer wheat
Wild oats

1 When applied with glyphosate (1 REL of glyphosate recommended).
2 Under normal conditions will be controlled up to the 4-leaf stage. Plants beyond this stage are unlikely to be controlled.
3 Including triazine-resistant biotypes.


Application Tips

To optimize weed control activity when applying Certitude®, follow these guidelines:

  • Apply as a tank-mix with glyphosate.
  • Always add adjuvant (Merge®).
  • Use a minimum of 5 gal/ac but 10 gal/ac helps maximize coverage in dense weed areas.
  • Should the product freeze, agitate or mix contents well before use.

When to Apply

  • Certitude should only be applied prior to planting.
  • Do not apply if heavy rain is forecast.
  • Certitude can be applied when broadleaf and grassy weeds are at or between the cotyledon and 4-leaf stages (up to the 6-leaf stage for volunteer canola).


Pre-harvest Interval (PHI)

There is no required pre-harvest interval between a pre-seed application of Certitude and the harvest of canola

How Much to Apply


Certitude A use rate (ml/ac) or (ml/ha)
7 ml/ac or 18 ml/ha

Certitude B use rate (ml/ac)  or (ml/ha)
243 ml/ac or 600 ml/ha

Mixing in Chem Handlers with the new Certitude Handling Tool

This new funnel tool lets you pour and rinse the Certitude Part A container directly in the chem handler. Here’s how to use it:

1. Affix the funnel tool to the Certitude A container.

2. Position the funnel and Certitude A container above the center knife system on the chem handler.

3. Add Certitude A component and continue to agitate until visibly dispersed.

4. Run water for a controlled rinse of the Certitude A container.

5. Important: Do not discard the funnel. It can be used for future Certitude mixing or for affixing to other containers for chem handler rinsing.

For more information on best handling practices, including images that illustrate proper funnel usage, click here.

Tank Mixes

Mixing Instructions

For enhanced weed control, Certitude should always be tank-mixed with glyphosate and is compatible with all liquid glyphosate formulations.

  1. Always start with a clean sprayer. Refer to previously applied product labels for specific cleaning instructions.
  2. Fill the clean spray tank 1/2 full with clean water and start agitation.
  3. Add Certitude A and continue to agitate until visibly dispersed.
  4. Add Certitude B and continue to agitate until mixed.
  5. Add glyphosate.
  6. Add Merge adjuvant.
  7. Continue agitating while adding the remaining amount of water

Follow Crops

These crops can be safely grown 1 year after an application of Certitude:

Field corn
Field peas
Navy (white) beans
Spring wheat
Winter wheat*

*Can be grown 4 months after application.