Arkansas previously blocked sales of Monsanto's dicamba herbicide in the state.

Monsanto officials also said on Wednesday that they were considering an investment of more than $1 billion in a dicamba herbicide production plant in Louisiana.

Xtend soybeans were launched with the dicamba herbicide in 2017 when they were used on 20 million acres, or 22% of U.S. plantings.

BASF and DuPont also sell dicamba herbicides under different brand names.

If implemented, the deadline could hurt sales of dicamba herbicides and Monsanto seeds resistant to the chemical.

In July, Arkansas temporarily banned the use and sale of dicamba herbicides after farmers said the chemical was drifting off target.