FMC Advances Novel Herbicide Rimisoxafen in Brazil Amid Growing Weed Resistance
Event summary
- FMC submitted a regulatory dossier for rimisoxafen, the first dual mode of action herbicide, to Brazilian authorities on September 28, 2026.
- This is the second global regulatory submission for rimisoxafen, following a U.S. EPA filing in July 2026.
- Brazil's 70 million hectares of corn and soybeans face mounting pressure from resistant broadleaf weeds like Amaranthus palmeri and Amaranthus hybridus.
- Rimisoxafen is classified under Groups 12 and 32 by the Herbicide Resistance Action Committee, offering a novel tool for weed resistance management.
- This is FMC's third novel herbicide active ingredient submission in Brazil, following Isoflex™ active and Dodhylex™ active.
The big picture
FMC's submission of rimisoxafen in Brazil underscores the growing need for innovative weed control solutions in one of the world's largest agricultural markets. With increasing resistance to existing herbicides, the introduction of a dual mode of action herbicide like rimisoxafen could reshape weed management strategies for Brazilian growers. This move also highlights FMC's strategic focus on advancing its R&D pipeline to address global agricultural challenges.
What we're watching
- Regulatory Timing
- The pace at which Brazilian authorities review and approve rimisoxafen will determine its market availability and competitive positioning.
- Market Adoption
- Whether Brazilian growers will embrace rimisoxafen as a solution to their complex weed resistance challenges remains to be seen.
- Pipeline Productivity
- FMC's ability to sustain its pipeline of novel herbicide active ingredients will be critical for maintaining its competitive edge in the crop protection market.