Proposed Re-evaluation Decision PRVD2021-10, Ancymidol and Its Associated End-use Products

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Table of contents

Proposed re-evaluation decision

Under the Pest Control Products Act, all registered pesticides must be regularly re-evaluated by Health Canada's Pest Management Regulatory Agency (PMRA) to ensure that they continue to meet current health and environmental safety standards and continue to have value. The re-evaluation considers data and information from pesticide manufacturers, published scientific reports, and other regulatory agencies. Health Canada applies internationally accepted risk assessment methods as well as current risk management approaches and policies.

Ancymidol is a plant growth regulator, used for height control of container-grown lilies, poinsettias and chrysanthemums. It reduces internode elongation resulting in more desirable compact plants through inhibition of gibberellins production within plants. Ancymidol is used with application limited to soil drench to ornamental plants grown in pots and the mechanical planting of treated seeds in pots.

Currently registered products containing ancymidol subject to this proposed re-evaluation decision can be found in Appendix I of PRVD2021-10, Ancymidol and Its Associated End-use Products. Registered pesticide product labels include specific directions for use. Directions include risk mitigation measures to protect human health and the environment that must be followed by law. As a result of the re-evaluation of ancymidol, these products were shown to have value in providing a pest management solution. When the current label directions are followed, potential risks to human health (occupational, dietary, residential and bystander) and the environment (aquatic and terrestrial organisms and their habitats) are considered to be acceptable. However, label updates are proposed to meet the current labelling standards (see Appendix II of PRVD2021-10).

Under the authority of the Pest Control Products Act and based on an evaluation of available scientific information, Health Canada is proposing that products containing ancymidol are acceptable for continued registration for use and sale in Canada, provided that the proposed updates to label directions are in place. All products containing ancymidol registered in Canada are subject to this proposed re-evaluation decision.

Next steps

The public, including the registrants and stakeholders, are encouraged to submit comments and information on this proposed decision during the 90-day public consultation periodFootnote 1 upon publication of this proposed re-evaluation decision PRVD2021-10.

All comments received during the 90-day public consultation period will be taken into consideration in preparation of the re-evaluation decision document,Footnote 2 which could result in revised risk mitigation measures. The re-evaluation decision document will include the final re-evaluation decision, the reasons for it and a summary of comments received on the proposed re-evaluation decision PRVD2021-10 with Health Canada's responses.

Additional scientific information

Additional scientific data are not required at this time.

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