Bayer asks EPA to again approve twice-banned weed killer
After multiple court-ordered bans, Bayer AG is once again asking the US Environmental Protection Agency (EPA) to approve the controversial weed killer dicamba for use on genetically modified crops, the EPA announced this week.
Dicamba has been responsible for millions of acres of damage to crops and natural areas since it was initially approved to be used starting in 2017 on genetically modified (GM) crops altered to withstand being sprayed with the herbicide. Farmers whose crops were not genetically modified suffered the damage, largely because the new uses for dicamba induced farmers to apply it during summer months when the chemical easily volatilized and drifted far from where it was applied.
Before the new use approvals, dicamba was primarily used before the growing season because of its volatility. But after the EPA agreed to industry requests to market dicamba herbicides to farmers for use during warm months on the specialized GM crops, farmers not planting the dicamba-tolerant GM crops registered thousands of complaints across multiple key farming states about dicamba damage.
In its request for fresh approval, Bayer, the German conglomerate that inherited dicamba in its 2018 acquisition of Monsanto, is now asking the EPA for more limits on the weed killer. Bayer is proposing, for example, that dicamba use be not allowed after soybean crops have emerged from the ground or after June 12. However, Bayer’s proposal still allows for cotton to be allowed throughout the summer. The proposal also limits the overall amount of dicamba allowed to be used, compared to previous EPA approvals.