You will learn:
Dicamba is a highly effective herbicide that has long been used to control difficult weeds, including palmer amaranth which is commonly known as pigweed. While dicamba has historically been used in the late winter and early spring as a pre-emergent herbicide due to its tendency to volatize and drift off-target, in 2016, the Environmental Protection Agency (EPA) approved a new, lower-volatility form of dicamba for use directly on dicamba-resistant soybeans and cotton. In the years since, EPA’s approval of dicamba for over-the-top use has been the subject of multiple lawsuits, with environmental plaintiffs claiming that EPA has violated both the Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA) and the Endangered Species Act.
On February 6, 2024, a federal court in Arizona issued a decision directing EPA to vacate the 2020 registrations allowing over-the-top use of three dicamba-based pesticides, XtendiMax, Engenia, and Tavium. This is the second time that a court has vacated the EPA’s approval of over-the-top use of dicamba, following a 2020 decision issued by the Ninth Circuit Court of Appeals which concluded that EPA had violated FIFRA when approving the new use. While the decision from the Arizona court relies on different legal arguments than the Ninth Circuit’s 2020 decision, the outcome is the same. Following the ruling, EPA has issued an order that will enable farmers to use existing stocks of dicamba directly onto crops during the 2024 growing season, but only if the pesticides were “labeled, packaged, and released for shipment” prior to February 6. After 2024, it is unclear whether dicamba will be available for over-the-top use going forward.
The Arizona court’s decision comes at a time when EPA is reexamining how it registers pesticide products, which could have implications for the future of dicamba. This webinar will take a look at the Arizona court’s decision, EPA’s response, and what may lie ahead for agricultural producers.