Consultation on 2,4-DB and Its Associated End-use Products, Proposed Re-evaluation Decision PRVD2018-08

Notice to the reader:

This consultation is now closed.

2,4-DB is a registered pesticide used by growers to control weeds in seedling legume and grass forage crops, pastures and cereals underseeded for forage. Direct use on cereals and field corn are no longer supported by the registrant and will be removed from label. Names of products in the Pesticide Label Search containing 2,4-DB include Cobutox, Agro-flex, Caliber and Embutox.

Following a scheduled re-evaluation under the Re-evaluation Program, Health Canada’s Pest Management Regulatory Agency (PMRA) is consulting Canadians on proposed changes to the way 2,4-DB is used, to further protect health and the environment.

Proposed changes include the following, with more details described in the consultation document itself:

  • Additional protection for people handling or applying the pesticide through protective clothing, a closed mixing/loading system and closed cab when handling/applying large amounts, and a required wait time before workers can re-enter treated areas
  • Additional protection of the environment through the addition of hazard statements and spray buffer zones to protect land and water habitats

For more information on the proposed decision open the “Proposed Re-evaluation Decision”.

How to Get Involved

This consultation is open for comment from 16 March 2018 to 14 June 2018 (90 calendar days).

To comment on PRVD2018-08:

Step 1
Request the full consultation document to read the Science Evaluation that is the basis of this proposed regulatory decision.

Step 2
Submit comments to the PMRA Publications Section.

All comments received will be considered. A final re-evaluation decision will consider additional scientific information provided during the public comment period.
Please refer to the document title (for example: PRVD2018-08, 2,4-DB and Its Associated End-use Products) when providing comments.

Reporting to Canadians

Health Canada will make the results of this consultation available on this website. Once the decision is finalized, the PMRA will post a Re-evaluation Decision on the Pesticides and Pest Management Reports and Publications portion of

If you have any questions, contact the Pest Management Information Service.

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