To manage herbicide resistance, which of the following products would be considered a true multi-mode of action product?¹

Product A contains two herbicides – a Group 1 and a Group 4. Each herbicidal active controls several different key weeds on its own.
Product B contains a Group 2 broadleaf herbicide and Group 4 herbicide that both control the same weed species.
Product C contains two Group 2 modes of action that control a number of weeds.

Answer: Product B – Each mode of action in a true multi-mode of action product controls the same weed(s), versus each mode of action controlling different weeds.

1 Herbicide Resistance: Farmer Attitudes, Opinions and Use Patterns, Dow AgroSciences Canada, 2017