Dicamba formulations for dicamba-tolerant soybeans are back for 2026. Dicamba options — which are subject to state registration status — include:
- Bayer’s Stryax (its previous dicamba formulation for dicamba-tolerant soybeans was XtendiMax)
- BASF’s Engenia (used with a BAPMA salt formulation)
- Syngenta’s Tavium
As with previous labels, ammonium sulfate cannot be used with dicamba. The federal label also limits dicamba application between wind speeds of 3 and 10 mph.
Changes from past labels include:
Application rates. Maximum application rates are cut in half. Farmers may now apply 1 pound per acre annually in increments of a 1/2 pound per acre each.
Nozzles. Farmers can now use coarse or coarser nozzles for increased applicator selection.
Other agent rates. Volatility reduction agent rates have doubled.
Conservation practices. Mandatory conservation practices required will include three mitigation points in most areas and an additional three points (for a six-point total) in pesticide-use limitation areas.
Dicamba. Dicamba for dicamba-tolerant soybeans cannot be applied if the maximum daily temperature exceeds 95 degrees F. Dicamba can only be applied on 50% of a farm’s acres if daily maximum temperatures reach 85 to 95 degrees F.
For example, farmers can only spray 500 acres of soybeans in a day if they grow 1,000 acres of soybeans. EPA employed this to reduce the total load in a local environment, said Ty Witten, Bayer vice president for commercial license to operate in North America.
Several states — including Iowa — have enacted date restrictions. In Iowa, dicamba can be applied up to June 12 or on soybeans up to the V4 stage, whichever comes first.