Developing decision support tools for effective herbicide use in the face of herbicide resistance

Dr. Breanne Tidemann, AAFC Lethbridge 

Start Date: April 1, 2021
End Date: March 31, 2023

AWC’s funding: $87,550 

Herbicide-resistant weeds continue to make weed management more challenging in western Canada. A key strategy in both managing and delaying the evolution of herbicide-resistant weeds is the use of multiple effective modes of action (MEMOA) during herbicide applications.

While this is a simple concept in theory, there are many complicating factors that make the determination of whether MEMOA is being used on different weed species more difficult. This project aims to develop a decision support tool to aid producers in determining what products would constitute MEMOA for target weeds in their field. In addition, a second tool would be developed to help identify the potential risk of herbicide resistance evolving based on a four-year crop rotation and the resulting herbicide choices.