Consultation on iodosulfuron-methyl-sodium and its associated end-use product, Proposed Re-evaluation Decision PRVD2025-10

Health Canada is consulting Canadians on the proposal to continue registration of iodosulfuron-methyl-sodium and associated end-use products registered for sale and use in Canada, with proposed updates to standard label statements.

Iodosulfuron-methyl-sodium is a selective sulfonylurea herbicide used to control a range of post-emergence grassy and broadleaf weeds in field corn. It is applied once a year by field sprayer.

Iodosulfuron-methyl-sodium is a substance with both a contact and selective mode of action that has acceptable value in providing a pest management solution. Based on the current use pattern, potential risks to human health (occupational, dietary, residential and bystander) and the environment (aquatic and terrestrial organisms) are considered to be acceptable when products containing iodosulfuron-methyl-sodium are used according to proposed label amendments.

Currently, there is one technical active ingredient and one commercial class end-use product registered for use in Canada. Registered products can be found in the Pesticide Product Information Database and in Appendix I of PRVD2025-10.

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

How to get involved

This consultation is open for comment from 30 October 2025 to 28 January 2026 (90 calendar days).

To comment on PRVD2025-10:

• Step 1: Open the summary of the proposed re-evaluation decision to access the document.
• Step 2: Submit comments to the Pest Management Regulatory Agency Publications Section on or before 28 January 2026

Please be sure to include the title of the consultation document on which you are commenting.

Health Canada will consider all comments that are directly related to the proposed decision, received up to 90 days from the date of publication of this document (by 28 January 2026) before making a final decision on the proposed re-evaluation for iodosulfuron-methyl-sodium and its associated end-use products. 

Reporting to the people of Canada

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 Canada.ca.

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

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