Monsanto Co is offering cash-back incentives to farmers who purchase a dicamba-based herbicide, even as scrutiny of dicamba products continues in some states.

The company is offering up to $6 per acre in cash back to farmers when they apply the XtendiMax with VaporGrip herbicide, Reuters reports. XtendiMax costs about $11 per acre to buy.

Dicamba herbicides, which are manufactured by Monsanto and BASF, are made for use on soybeans and cotton created by Monsanto to resist the chemical. Farmers have complained that the herbicide has drifted to areas beyond where it was sprayed, damaging crops.

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