Changes to the registration of pyrethrins pesticides (agricultural uses)

Organization: Health Canada

ISBN: 978-0-660-71986-3

Date published: 2024-07-26

All pesticides used in Canada must be registered under the Pest Control Products Act. Pesticides are re-evaluated to ensure that they continue to meet health and environmental requirements. Re-evaluation may result in the revocation of a product or product uses. Health Canada may also request changes to a product's label, including mitigation measures, use sites and application methods.

Pyrethrins are insecticides used on a wide range of sites. The highlights of the re-evaluation decision concerning the agricultural uses of the active ingredient pyrethrins, published on March 2, 2023, are summarized below.

In this factsheet, agricultural uses include agricultural, horticultural, greenhouses, domestic gardens and turf uses.

Cancelled Products

Cancelled product	Last date of sale	Last date of use
Domestic products listed in Appendix 1, Table 2 of the re-evaluation decision	March 2, 2024	September 2, 2024
Products listed in Appendix 1, Table 4 of the re-evaluation decision	March 2, 2025	March 2, 2026

Label changes for pyrethrins pesticides

As of March 2, 2025

• Stop post-harvest use on bulked or bagged stored grains

As for March 2, 2026

• Stop use on crops not specifically identified on product labels

Other risk reduction measures, as of March 2, 2025

• Pre-planting delay of 30 days for rotating crops not specifically identified on labels
• Updated restricted-entry intervals (REI)
• Limits to the amount of product handled per day
• Updated required personal protective equipment (PPE)
• Use prohibited in greenhouses and on ornamentals for products that used to be registered for greenhouses and ornamentals unless the product is registered for use on green house peppers and chillis
• Additional hazard statements for bees, beneficial insects and aquatic organisms
• Application prohibited on crops that are very attractive to bees during the flowering period, and on other crops when bees are foraging
• Updated spray buffer zones
• Warnings for sites with characteristics that may be conducive to runoff and when heavy rains are expected
• Recommendation to install a vegetative filter strip (VFS)

Users must follow the instructions on the updated labels.

Using a pesticide contrary with the label directions is a violation of the Pest Control Products Act.

Read the label

All pesticides registered in Canada have a Health Canada-approved label with a registration number. Read the pesticide label carefully, as it contains specific information on how to use it.

To find the most up-to-date label, use our online label search tool, or search for "Health Canada pesticide labels" using your favourite search engine.