The restrictions were intended to limit dicamba evaporating into the air and washing off fields.
EPA asked Bayer to select restrictions on its dicamba weedkiller, then used the company’s choices in a proposed rule. Internal documents released in litigation reveal the exchange, the Guardian reported on Sept. 20, 2026. EPA defended the process, saying companies may suggest protections but ‘the registrant does not dictate terms.’
Where it stands. EPA’s current approval permits spraying dicamba on growing cotton and soybeans during the 2026 and 2027 growing seasons; other uses were already allowed. EPA’s approval explanation. The material provided does not establish whether the current approval retained Bayer’s choices from the proposed rule.