Proposed Re-evaluation Decision PRVD2018-13, Strychnine and Its Associated End-use Products

Pest Management Regulatory Agency
29 June 2018
ISSN: 1925-0967 (PDF version)
Catalogue number: H113-27/2018-13E-PDF (PDF version)

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Table of Contents

Proposed Re-evaluation Decision

Under the authority of the Pest Control Products Act, all 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. Re-evaluations consider scientific data and information from pesticide manufacturers, published scientific reports and other regulatory agencies. The PMRA applies internationally accepted risk assessment methods, as well as current risk management approaches and policies, to all re-evaluations.

Strychnine is the active ingredient in restricted-class products applied as baits to control certain types of ground squirrels (Richardson’s, Columbian, Franklin’s, and thirteen-lined ground squirrels). Please refer to Appendix I of PRVD2018-13 for a list of products containing strychnine that are registered to control ground squirrels in Canada.

This document (Proposed Re-evaluation Decision PRVD2018-13, Strychnine and Its Associated End-use Products) presents the proposed regulatory decision specifically for the re-evaluation of ground squirrel use of strychnine, including the proposed risk mitigation measures to further protect the environment, as well as the science evaluation on which the proposed decision was based. All products containing strychnine that are registered to control ground squirrels in Canada are subject to this proposed re-evaluation decision. PRVD2018-13 is subject to a 90-day public consultation period, during which the public including the registrants and stakeholders may submit written comments and additional information to the PMRA Publications Section. The final re-evaluation decision will be published after the PMRA has taken the comments and information received into consideration.

Outcome of Science Evaluation

An evaluation of available scientific information confirmed that there are risks of concern for non-target organisms, including species at risk, for products registered to control ground squirrels.

Proposed Regulatory Decision for the Use of Strychnine to Control Ground Squirrels

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 strychnine for control of ground squirrels do not meet current standards for environmental protection and, are therefore, proposed to be cancelled.

International Context

Canada is a member of the Organisation for Economic Co-operation and Development (OECD), which provides a forum in which governments work together to share experiences and seek solutions to common problems.

As part of the re-evaluation of an active ingredient, the PMRA takes into consideration recent developments and new information on the status of an active ingredient in other jurisdictions, including OECD member countries. In particular, decisions by an OECD member country to prohibit all uses of an active ingredient for health or environmental reasons are considered for relevance to the Canadian situation.

Strychnine is currently registered for certain uses in other OECD member countries, including the United States and Australia, although registered uses do not include control of ground squirrels. As of 18 April 2018, no decisions by an OECD member country to prohibit all uses of strychnine for health or environmental reasons have been identified. Strychnine is currently under registration review by the United States Environmental Protection Agency.

Next Steps

The public, including the registrants and stakeholder, is encouraged to submit comments during the 90-day public consultation period upon publication of the 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. 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.

The implementation timeline for the cancellation or amendments to product labels that contain the use on ground squirrels will be determined at the final decision phase of this re-evaluation, in accordance with the provisions of the PMRA’s cancellation and amendments policy (Regulatory Directive DIR2018-01, Policy on Cancellations and Amendments Following a Re-evaluation and Special Review).

Additional Scientific Information

No additional information is requested at this time.

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