Consultation on verbenone and its associated end-use products, Proposed Re‑evaluation Decision PRVD2022-19

Notice to the reader:

The online consultation is now closed.

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

Verbenone is an anti-aggregation pheromone registered as an outdoor insect repellent. Verbenone is a naturally occurring semiochemical produced by yeast in the gut of the mountain pine beetle, Dendroctonus ponderosae. When used in pest control products, verbenone can protect pine stands and individual pine trees by repelling adult mountain pine beetle, preventing the laying of eggs on the protected trees. Two commercial-class products and one domestic-class product containing verbenone are formulated as slow-release generators packaged in pouches. Verbenone end-use products are nailed or stapled to pine tree trunks and slowly release verbenone into the atmosphere through evaporation.

Verbenone is a naturally occurring substance with a non-toxic mode of action that has value in providing a pest management solution. Based on the current use pattern of verbenone, dietary (food and water) exposure to verbenone is not anticipated. The potential risks to human health and environment are considered to be acceptable when products containing verbenone are used according to the proposed updated label directions. As a result of re-evaluation, updates to label statements as per current labelling standards are proposed.

Verbenone has value in providing a solution for pest control to protect pine trees from mountain pine beetle attacks. When used in integrated pest management programs, verbenone can play a valuable part in resistance management and may help reduce the need for conventional insecticides.

All products containing verbenone registered in Canada are subject to this proposed re-evaluation decision. For a full list of products containing verbenone, please consult Appendix I in the Proposed Re-evaluation Decision or visit the Pesticide Label Search database.

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

How to get involved

This consultation is open for comment from 6 September 2022 to 5 December 2022 (90 calendar days).

To comment on PRVD2022-19:

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: PRVD2022-19, Verbenone 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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