Trends in fungicide use and resistance in North America: the case of Canadian wheat production systems

Publication date: 28-04-2026
Extent: 34 pages

Contributions by: Reem Aboukhaddour, Mohamed Hafez and Ryan Gourlie, Agriculture and Agri-Food Canada, Canada; and Michale Harding, Alberta Agriculture and Irrigation, Canada

Chapter synopsis:

This chapter begins by reviewing general trends in fungicide use in North America. It discusses fungicide groups used in North America, factors affecting resistance patterns and how this has affected patterns of resistance across North America, with a particular focus on the situation in Canada. To illustrate the challenge of fungicide resistance in the region in more detail, it then focuses on fungicide resistance issues affecting wheat production in Canada, looking at the molecular basis of fungicide insensitivity, testing for fungicide insensitivity, exploiting fitness costs and regulatory issues.

DOI: 10.19103/AS.2025.0163.01