St. Louis-based Monsanto has invested more than $1 billion in a dicamba production facility in Luling, La., to supply the herbicide as the Xtend soybean system takes hold.
DuPont will sells its new dicamba-based herbicide as DuPont FeXapan with VaporGrip technology. VaporGrip is Monsanto’s proprietary formulation that reduces dicamba drift and volatilization.
The Xtend system is being promoted to control weeds—particularly Palmer amaranth—that have grown resistant to glyphosate and PPO herbicides.
Dicamba belongs to the Herbicide Resistance Action Committee Group O, whereas glyphosate is a Group G and PPOs are Group E’s.
Although the Xtend system received Environmental Protection Agency approval for planting this season, many soybean producers held off until the European Union approves the treat. Only about 1 million acres of Xtend soybeans were planted as a result.
DuPont’s herbicide will be paired with Monsanto’s Roundup Ready 2 Xtend cropping system, which involves soybean varieties genetically modified to withstand over-the-top applications of glyphosate and dicamba.
In 2013, DuPont signed a licensing agreement with Monsanto to incorporate its Xtend trait into its Pioneer brand seeds. This season, Pioneer offered 12 soybean varieties with the Roundup Ready 2 Xtend technology.
Dicamba itself was first registered in 1967 and controls a broad array of broadleaf weeds, including those resistant to glyphosate and PPO herbicides.