Consultation on 1-Methylcyclopropene and Its Associated End-use Products, Proposed Re-evaluation Decision PRVD2022-05

Notice to the reader:

The online consultation is now closed.

Health Canada is consulting Canadians on the proposal to continue registration of 1‑methylcyclopropene and all associated end-use products registered for sale and use in Canada.

1-Methylcyclopropene is a plant growth regulator that inhibits production of ethylene, a plant hormone that promotes fruit ripening and senescence. It is used to preserve cut flowers and fruits (apples, bananas, pears and tomatoes) when applied as a post-harvest (in storage) use. It is also applied as a pre-harvest aid to apples, which delays ripening and prevents fruit drop.

When the current label directions are followed, the products are shown to have value, and potential risks to human health and the environment are considered to be acceptable. As a result of the re-evaluation of 1-methylcyclopropene, no additional risk mitigation measures are proposed by Health Canada. However, label updates are proposed to meet the current labelling standards.

For a full list of products containing 1-methylcyclopropene 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 24 March 2022 to 22 June 2022 (90 calendar days).

To comment on PRVD2022-05:

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: PRVD2022-05, 1-Methylcyclopropene and Its Associated End-use Products.

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.

Interested in our other consultations? Sign up and stay informed about topics that matter to you.

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