Proposed Re-evaluation Decision PRVD2022-07, (Z)-9-Tricosene and Its Associated End-use Products

Pest Management Regulatory Agency
26 April 2022
ISSN: 1925-0967 (PDF version)
Catalogue number: H113-27/2022-7E-PDF (PDF version)

Table of contents

• Proposed re-evaluation decision
• Next steps
• Other information
• Additional scientific information

Proposed re-evaluation decision

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

This document (Proposed Re-evaluation Decision PRVD2022-07, (Z)-9-Tricosene and Its Associated End-use Products) presents the proposed regulatory decision for the re-evaluation of (Z)-9-tricosene, including any proposed amendments (risk mitigation measures) to protect human health and the environment, as well as the science evaluation on which the proposed decision is based.

(Z)-9-tricosene, also known as muscalure, is used for the control of flies and acts as a fly attractant. It is a semiochemical that is produced by the female house fly, Musca domestica. (Z)‑9-tricosene commercial end-use products are registered for use in and around animal/livestock housing or in residential/commercial structures and inside transport vehicles. The commercial class end-use products are co-formulated with conventional insecticides and are available as bait stations, sprays or brushable paint. The domestic class end-use product is not co-formulated with any other insecticide and is registered for outdoor use around residential and farm buildings to reduce fly populations using physical traps. Currently registered products containing (Z)-9-tricosene are listed in Appendix I of PRVD2022-07.

(Z)-9-tricosene has a non-toxic mode of action and has value in providing a pest management solution. Based on the current use pattern of (Z)-9-tricosene, dietary exposure is not anticipated. The potential risks to human health (occupational, residential, and bystander) and environment (terrestrial and aquatic organisms) are considered to be acceptable when products containing (Z)‑9-tricosene are used according to label directions. As a result of re-evaluation, no additional mitigation measures are proposed, however, updates to labels as per current labelling standards are proposed (Appendix II of PRVD2022-07).

Under the authority of the Pest Control Products Act and based on the evaluation of currently available scientific information, products containing (Z)-9-tricosene (Appendix I of PRVD2022-07) are proposed for continued registration in Canada, with the proposed updates to label directions (Appendix II of PRVD2022-07).

All products containing (Z)-9-tricosene registered in Canada are subject to this proposed re-evaluation decision. PRVD2022-07 is subject to a public consultation,^{Footnote 1} during which written comments and additional information may be submitted to PMRA Publications. The final re-evaluation decision will be published taking into consideration the comments and information received during the consultation period.

Next steps

The public, including the registrants and stakeholders, are encouraged to submit written comments and additional information during the 90-day public consultation period 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 Health Canada’s responses.

Other information

When Health Canada makes its re-evaluation decision, it will publish a Re-evaluation Decision on (Z)-9-tricosene (based on the Science evaluation of PRVD2022-07). In addition, the test data referenced in this consultation document will be available for public inspection, upon application, in the PMRA’s Reading Room.

Additional scientific information

Additional scientific data are not required at this time.