Proposed Re-evaluation Decision PRVD2021-01, Flufenacet and Its Associated End-use Products

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Pest Management Regulatory Agency
28 January 2021
ISSN: 1925-0967 (PDF version)
Catalogue number: H113-27/2021-1E-PDF (PDF version)

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Table of contents

Proposed re-evaluation decision for flufenacet and associated end use products

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

Flufenacet is a herbicide registered for use on field corn and soybeans to control annual grasses and broadleaf weeds in Eastern Canada. The application timing is preplant, pre-emergent and early post-emergent, with one application per season. Currently registered products containing flufenacet can be found in the Pesticide Label Search and in Appendix I of PRVD2021-01.

This document (PRVD2021-01, Flufenacet and Its Associated End-use Products) presents the proposed re-evaluation decision for flufenacet, including the proposed risk mitigation measures to protect human health and the environment, as well as the science evaluation on which the proposed decision is based. All products containing flufenacet registered in Canada are subject to this proposed re-evaluation decision. This document (PRVD2021-01) 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 PMRA Publications. The final re-evaluation decision will be published after taking into consideration the comments and information received during the consultation period.

Proposed re-evaluation decision for flufenacet

Under the authority of the Pest Control Products Act and based on an evaluation of available scientific information, Health Canada is proposing cancellation of the registration of flufenacet and all associated end-use products registered for sale and use in Canada as the potential risk to human health was not shown to be acceptable.

With respect to human health, dietary risks were not shown to be acceptable when used according to current conditions of registration. Occupational risks to mixer/loaders and applicators were not shown to be acceptable when used according to current conditions of registration, or when additional mitigation measures were considered (such as higher levels of personal protective equipment (PPE) and engineering controls).

Flufenacet poses potential risks to birds, aquatic organisms and terrestrial plants. However, potential risks to the environment from flufenacet were shown to be acceptable with additional mitigation measures, such as precautionary label statements and spray buffer zones for the protection of terrestrial and aquatic habitats (2–4 metres).

Flufenacet has value as an effective weed management tool for use in conventional or non-glyphosate tolerant field corn and soybean. Cancellation of flufenacet and its associated end-use products is expected to have minimal impact on Canadian growers since many effective alternative herbicides are available.

Risk mitgation measures

Human health

The following risk management measure is proposed to address the identified dietary and occupational risks (mixing/loading/application) resulting from the use of flufenacet:

The following risk-reduction measures are identified to mitigate potential risks to workers entering treated areas to conduct postapplication activities. However, as all uses are proposed for cancellation based on the potential dietary and occupational (mixing/loading/application) risks, these risk mitigation measures are not included as part of the proposed re-evaluation decision at this time.

Environment

The following risk-reduction measures are identified to mitigate potential risks to the environment. However, as all uses are proposed for cancellation based on the potential human health risks, the risk mitigation measures related to the environment are not included as part of the proposed re-evaluation decision at this time.

International context

Flufenacet is currently acceptable for use in other Organisation for Economic Co-operation and Development (OECD) member countries including the United States, the European Union, and Australia. No decision by an OECD member country to prohibit all uses of flufenacet for health or environmental reasons has been identified as of 4 September 2020.

Next steps

The public, including pesticide manufacturers and stakeholders, are encouraged to submit comments and information on this proposed decision (PRVD2021-01) during the 90-day public consultation periodFootnote 1

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 with Health Canada’s responses.

Additional scientific information

No additional scientific data are required at this time.

Footnote 1

“Consultation statement” as required by subsection 28(2) of the Pest Control Products Act.

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Footnote 2

“Decision statement” as required by subsection 28(5) of the Pest Control Products Act.

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