Changes to the registration of tebuconazole pesticides

Organization: Health Canada

Published: 2025-07-XX

ISBN : 978-0-660-77765-8

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.

Tebuconazole is a systemic fungicide used on field crops, asparagus and turf, for seed treatment and as a wood preservative. Highlights of the re-evaluation decision for the active ingredient tebuconazole, published on November 20, 2024, are summarized below.

Use as a wood preservative has been evaluated separately and is therefore excluded from this document.

Cancelled products, as of November 20, 2027

The use on turf is cancelled. You must therefore stop using the following products:

The sale of those products is prohibited as of November 20, 2026.

Changes to the label of tebuconazole pesticides, as of November 20, 2026

Risk reduction measures

• Updated maximum annual application rate
• Limit of a single application/year on asparagus and intensive short-rotation crops (poplar and willow)
• Rotational plant-back interval of at least 120 days between application for food and feed crops
• Updated application rates and a maximum of one application/year or two half-rate applications at 10-day apart intervals for soybeans
• Imposition of a 12-hour restricted-entry interval (REI) for agricultural sites
• Closed systems required for commercial corn seed treatment
• Enclosed cabin equipped with an adequate air filter preventing any contact between the occupant and the pesticides required for seeding seeds treated with tebuconazole
• Updated personal protective equipment (PPE) requirements, according to the type of activity and the type of application equipment.
• Limit on amount of product handled per day when applying with a handheld airblast/mistblower
• Updated buffer zones
• Added warnings to protect aquatic habitats and non-target organisms

Users must follow the instructions on the updated labels.
Using a pesticide contrary to the label directions is a violation of the Pest Control Products Act.

Read and follow 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.