Christina Halford ([email protected]) Thorne Wallman ([email protected]) Lennart Welin ([email protected]) Annika Rosengren ([email protected]) Annika Bardel ([email protected]) Saga Johansson ([email protected]) Henry Eriksson ([email protected]) Ed Palmer ([email protected]) Lars Wilhelmsen (lars.wilhelmsen...

BACKGROUND The widespread occurrence of ALS inhibitor- and glyphosate-resistant Amaranthus palmeri has led to increasing use of protoporphyrinogen oxidase (PPO)-inhibiting herbicides in cotton and soybean. Studies were conducted to confirm resistance to fomesafen (a PPO inhibitor), determine the resistance frequency, examine the resistance profile to other foliar-applied herbicides and investig...