The Environmental Protection Agency (EPA) granted new registrations and labels for Corteva Agriscience’s Enlist One and Enlist Duo herbicides on Jan. 11. The products are registered for seven years but will not be available to Texas growers in a limited number of counties with federally listed endangered species.

The new labels are approved for use in the following states: Alabama, Arkansas, Arizona, Colorado, Delaware, Florida, Georgia, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maryland, Michigan, Minnesota, Mississippi, Missouri, Nebraska, New Jersey, New Mexico, New York, North Carolina, North Dakota, Ohio, Oklahoma, Pennsylvania, South Carolina, South Dakota, Tennessee, Texas, Virginia, West Virginia and Wisconsin.

Enlist One and Enlist Duo are 2,4-D-based pesticides for over-the-top use in 2,4-D-tolerant cotton, corn and soybeans to help control broadleaf weeds.

The new label adds several new requirements to protect endangered species, pollinators and habitats, and limit off-target drift.

The labels also prohibit the use of Enlist One and Duo “in counties where EPA has identified risks to listed species that use, corn, cotton or soybean fields for diet and/or habitat.”

Growers in Texas counties that are prohibited from using Enlist One include Bell, Bowie, Cameron, Cooke, Fannin, Grayson, Hidalgo, Hill, Lamar, McLennan, Nueces, Red River, San Patricio, Willacy and Williamson.

In Texas, those counties prohibited from using Enlist Duo include Bastrop, Bell, Bowie, Burleson, Cameron, Colorado, Cooke, Fannin, Grayson, Hidalgo, Hill, Lamar, McLennan, Milam, Nueces, Red River, Refugio, Robertson, San Patricio, Victoria, Willacy and Williamson.

Label requirements include, but are not limited to:

  • No application permitted after soybean and cotton crops are in bloom and might attract pollinators.
  • No application permitted when rainfall is expected within 48 hours or soil is fully saturated.
  • No irrigation that could produce runoff within 48 hours of application.
  • Users must select from a list of runoff reduction measures to reduce 2,4-D and glyphosate concentrations in runoff.
  • Only approved tank mixes, nozzles and spray pressures allowed.
  • Downwind 30-foot infield buffer required to protect sensitive areas.
  • Corteva to provide mandatory education and training about importance of pollinators.

Texas A&M AgriLife Extension Service has scheduled trainings around the state where dicamba and 2,4-D products are used. Check with your local AgriLife Extension county agent to find the closest training.