Dicamba herbicide has been banned, re-approved, and banned again by courts three times since 2020, leaving farmers unable to plan what to spray each season

Dicamba, a volatile herbicide used on genetically engineered soybeans and cotton, has been caught in a legal and regulatory whipsaw that makes it impossible for farmers to plan their weed management programs. Federal courts vacated EPA's registration in 2020. The EPA re-registered it in 2021. A federal court in Arizona vacated it again in February 2024. The EPA proposed re-approving it in July 2025 with loosened restrictions, eliminating the previous June cutoff date and dropping a 100-foot endangered species buffer. Environmental groups sued again in February 2026. Farmers planting dicamba-tolerant seeds have no certainty their primary herbicide will be legal by the time they need to spray. This regulatory chaos creates concrete financial damage. Dicamba-tolerant seed systems (Roundup Ready 2 Xtend, XtendFlex) cost farmers a technology fee of $10-15 per acre. If a court bans dicamba mid-season, farmers who already planted these seeds lose both the technology fee and their primary weed control tool, forcing emergency purchases of alternative herbicides that may not control resistant weeds. But the damage extends beyond the farmer who chose dicamba. Dicamba volatilizes in hot weather and drifts onto neighboring fields, damaging non-tolerant soybeans, orchards, vegetable gardens, and trees. The USDA estimated 15 million acres of soybeans were damaged by dicamba drift in 2018 alone. This has triggered thousands of complaints, neighbor-vs-neighbor lawsuits, and a Bayer settlement of $400 million. The social fabric of rural farming communities has been torn apart by a chemical that one neighbor uses and another's crops are destroyed by. This problem persists because of a fundamental conflict between EPA's registration authority and judicial review. The EPA registers pesticides under FIFRA based on risk-benefit analysis, but courts have repeatedly found that EPA failed to adequately assess drift damage and endangered species impacts. Each time EPA re-approves dicamba, environmental groups sue, and each time courts agree that EPA's analysis was inadequate. Meanwhile, farmers have already purchased seeds and planned their season around the product. The agrochemical companies (Bayer, BASF, Syngenta) continue to sell dicamba-tolerant seed systems because each re-approval, however temporary, generates billions in revenue. There is no mechanism in FIFRA for conditional or provisional registration that could give farmers certainty while the legal issues are resolved.