Proposed Re-evaluation Decision PRVD2019-02, Triforine and Its Associated End-use Products
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Pest Management Regulatory Agency
12 March 2019
ISSN: 1925-0967 (PDF version)
Catalogue number: H113-27/2019-2E-PDF (PDF version)
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Table of Contents
- Proposed Re-evaluation Decision
- Outcome of Science Evaluation
- Proposed Regulatory Decision for Triforine
- International Context
- Next Steps
Proposed Re-evaluation Decision
Under the authority of 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.
Triforine is a fungicide used to control fungal diseases in a range of berry crops, stone fruits, pome fruits and ornamentals.
This document (Proposed Re-evaluation Decision PRVD2019-02, Triforine and Its Associated End-use Products) presents the proposed regulatory decision for the re-evaluation of triforine including the proposed risk mitigation measures to further protect human health and the environment, as well as the science evaluation on which the proposed decision was based. All products containing triforine registered in Canada are subject to this proposed re-evaluation decision. PRVD2019-02 is subject to a 90-day public consultation period, during which the public including the pesticide manufacturers and stakeholders may submit written comments and additional information to the PMRA Publications Section. The final re-evaluation decision will be published taking into consideration the comments and information received.
Outcome of Science Evaluation
With respect to human health, the health risks associated with the use of triforine and associated end-use products are acceptable when these products are used according to the proposed revised label directions.
Triforine enters the environment when used as a fungicide on labelled crops. Based on the available scientific information, risks to the environment were found to be acceptable when triforine is used according to the proposed revised label directions.
Triforine is valued for its systemic properties, and as an alternative to manage resistance development in susceptible fungal pathogens. It is important to ornamental growers as there are few fungicides registered to control black spot on ornamentals.
Proposed Regulatory Decision for Triforine
Under the authority of the Pest Control Products Act and based on the evaluation of currently available scientific information, Health Canada is proposing that products containing triforine are acceptable for continued registration in Canada, provided that the proposed risk mitigation measures are in place.
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 triforine, further risk mitigation measures, as summarized below, are being proposed.
- A minimum pre-harvest interval of 60 days for cherries, peaches, plums and prunes to protect consumers.
- Updated statements for personal protective equipment (PPE) to protect mixers, loaders and applicators.
- Updated restricted-entry intervals (REIs) for certain agricultural crop activities to protect workers entering treated sites.
- A statement to promote best management practices in order to protect bystanders from spray drift.
- Spray buffer zones to protect non-target terrestrial habitats (1−2 metres).
- An updated hazard statement on labels to warn users that triforine has the potential to leach into groundwater.
Triforine is currently acceptable for use in other Organisation for Economic Co-operation and Development (OECD) member countries, including the United States, Australia and New Zealand. No decision by an OECD member country to prohibit all uses of triforine for health or environmental reasons has been identified.
The public including the registrants and stakeholders are encouraged to submit additional information that could be used to refine risk assessments during the 90-day public consultation periodFootnote 1 upon publication of this proposed re-evaluation decision.
All comments received during the 90-day public consultation period will be taken into consideration in preparation of 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 with the PMRA’s responses.
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