BASF Wins EPA Registration for Ridivex, Its First New Corn Herbicide Mode of Action in Over a Decade
30 October 2026, Washington, US: BASF has received U.S. Environmental Protection Agency registration for Ridivex herbicide, a new post-emergence, three-active premix for corn, the company announced on October 19, 2026. The registration clears the way for a 2027-season launch, though BASF says the product is not yet available for order and will not reach the market until next year’s growing season.
Ridivex combines diflufenzopyr, dicamba, and pyroxasulfone in a single premixed formulation, along with a built-in crop safener intended to reduce the risk of crop injury. BASF describes the product as its first new corn post-emergence herbicide innovation in more than ten years. According to the company, Ridivex is designed to deliver visible knockdown of susceptible broadleaf weeds within about four hours of application, with activity reported against more than 200 broadleaf weed species, and residual control of more than 80 broadleaf and grass weed species for up to eight weeks under favorable conditions. The pyroxasulfone component is the same residual chemistry used in BASF’s existing Zidua SC herbicide, while diflufenzopyr is intended to enhance dicamba’s movement and performance within the plant.
“Ridivex is the first corn POST herbicide innovation from BASF in over a decade,” said Jessica Dorsey, Product Manager for Corn POST Herbicides at BASF Agricultural Solutions, describing the product as an all-in-one early post-emergence option designed to keep fields clean through critical early growth stages.
The registration addresses a problem that has been building across the U.S. Corn Belt for years: Palmer amaranth and waterhemp, two of the most economically damaging row-crop weeds in the country, have developed resistance to multiple herbicide groups, including glyphosate and, in a growing number of populations, HPPD inhibitors. BASF first disclosed the Ridivex formulation in March 2026, when the product was still pending EPA review, and the October registration marks the point at which the herbicide moves from a regulatory filing to an approved product awaiting commercial rollout. The announcement also arrived alongside a wave of other new corn and soybean herbicide activity this fall, including UPL’s introduction of Winger SC, a standalone pyroxasulfone herbicide aimed at similar resistant weed populations ahead of the 2027 season.
BASF has cautioned growers and retailers that label restrictions, particularly around dicamba application timing and off-target movement, will remain central to how Ridivex can be used, and that independent field trial data will be important before growers shift significant acreage toward the new premix. The company’s Agricultural Solutions division reported €9.6 billion in sales and €990 million in research and development investment in 2025, underscoring the scale of investment behind new chemistries such as Ridivex at a time when the broader crop protection industry has leaned heavily on combination products and new formulation technology rather than entirely new active ingredients.
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