The Environmental Protection Agency on Wednesday said stakeholders would have until May 30 to comment on its proposed registration of Dow Agrosciences' herbicide Enlist Duo, a proprietary mixture of 2,4-D choline and glyphosate.
The mixture, intended for use in the Enlist cropping system, requires EPA review due to the inclusion of choline form of 2,4-D. Glyphosate is already registered and used widely.
According to EPA, the new mixture would provide an additional tool to farmers struggling to control glyphosate-resistant weeds.
To ensure that Enlist Duo successfully manages weed resistance problems, EPA said the proposal would impose requirements on the manufacturer, including robust monitoring and reporting to EPA, grower education and remediation.
The proposal would also allow EPA to take swift action to impose additional restrictions on Dow Agrosciences and the use of the pesticide, if resistance develops.
Aiming to proactively address drift issues, Dow said the 2,4-D choline and glyphosate mixture features "Colex-D" technology, which will provide minimized potential for physical drift, ultra-low volatility, reduced odor and better handling characteristics.
"In its review, the EPA acknowledged the significant scientific advancements Dow AgroSciences made with Enlist Duo herbicide as it relates to off-target movement," Damon Palmer, Dow AgroSciences' U.S. commercial leader for Enlist said in a press statement. "Enlist Duo herbicide will help solve the tremendous weed control challenges that growers are facing, and it will do so with technology optimized for on-target application."
The draft label for Enlist Duo includes proposed registration for Iowa, Illinois, Indiana, Ohio, South Dakota and Wisconsin. Dow AgroSciences said it is working with the EPA to expand the list of states in time for the technology's launch.
Pending regulatory approvals, Dow AgroSciences expects to launch Enlist corn and Enlist soybeans in 2015, with Enlist E3 soybeans and Enlist cotton to follow.
With the launch of the system, Dow says growers and retailers will have access to the "Enlist Ahead" resource. Enlist Ahead will provide best management recommendations to complement the herbicide label requirements, including the use of a residual, soil-applied preemergence herbicide for weed resistance management, the company says.
Public comments on the EPA's proposed regulatory decision must be submitted no later than May 30, 2014. Comments may be submitted to the EPA docket EPA-HQ-OPP-2014-0195 at www.regulations.gov.
After the comment period closes, EPA says it will review all of the comments and reach a final decision, expected in late summer or early fall.