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Enlist One and Enlist Duo Re-Registration: What Do We Need to Know?
By: Tommy Butts, Tom Barber, and Jeremy Ross
Enlist herbicides [Enlist One (2,4-D choline) and Enlist Duo (2,4-D choline + glyphosate)]
were recently granted amended seven-year registrations for over-the-top applications
on Enlist corn, cotton, and soybean. This is great news for individuals who are using
the Enlist cropping system. However, there were numerous counties (including several
in western Arkansas) in which the use of Enlist herbicides has been prohibited by
the EPA due to their updated Endangered Species Act risk assessment. Additionally,
there were some new labeling guidelines everyone should be aware of that were implemented
to reduce the impacts of off-target and runoff movement.
Both Enlist One and Enlist Duo are officially prohibited from being used in the following 11 Arkansas counties at this time (Fig. 1):
Counties in Arkansas that are NOT listed above, do not fall under these restrictions
and Enlist herbicides are permitted for use in accordance with the label.
This is extremely unfortunate news for growers in these counties. With glufosinate
(Liberty) prices skyrocketing and its limited availability for 2022, the ban on Enlist
herbicides leaves minimal, if any, effective POST herbicide options for PPO-inhibitor-resistant
Palmer amaranth control. If you farm in the affected counties listed above and had
Enlist crops in your plans for 2022, we recommend the following:
Other changes to the Enlist labeling affecting all applicators are aimed at reducing
potential risk of non-target species, mitigating runoff, and protecting pollinators.
These federal changes and additional information regarding the seven-year EPA registrations
can be found here: https://www.dtnpf.com/agriculture/web/ag/crops/article/2022/01/11/epa-gives-enlist-herbicides-new-year or visit https://www.enlist.com.
Additionally, the EPA noted in their news release that the new Enlist registrations
are among the first herbicides to have undergone a full EPA analysis of their effect
on endangered species and critical habitats. As a result, we all must be aware moving
forward that these area/county wide bans may become more commonplace with future herbicide
registrations and re-registrations.