New Dicamba Formulations for Cotton &
Soybean Growers
As of April 1, 2017, the EPA has registered Engenia,
FeXapan, arid XtendiMaxfor in-season (pre-emergence,
post-emergence) use on cotton and soybean crops
genetically engineered to tolerate dicamba. Application
restrictions and use patterns have changed, compared to
previously registered dicamba products.
•	It is critical that all retailers, applicators, and
growers are knowledgeable of these new
requirements.
•	New requirements for spray tip, spray pressure,
sprayer speed, and boom height are all designed to
IMPROVE on-target pesticide applications, thereby
more effectively stewarding agriculture.
•	New wind speed restrictions during application also
improve on-target applications. Additionally,
understanding the influence of land terrain,
humidity, and size of the crop during application is
beneficial.
•	New buffer requirements are designed to protect
sensitive areas and specialty crops.
•	Several states require training prior to using these
herbicides in season; those requirements must be
followed.
Wind
Aerial photo showing
Courtesy of Dr, Alan1
on small fields in N.C.
University
Cover
Remember - The Label Is the Law!
ALWAYS read and follow label directions, including
checking supplemental labels for additional information
Use of older dicamba formulations that are not
registered for GE dicamba-tolerant cotton or soybean is
a serious violation of the law!
Misuse is taken very seriously and will be
investigated by the State Department of
Agriculture.
Willful misuse violations can lead to serious legal
ramifications, hefty monetary fines, and possible
civil liability.
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Engineered Crops
Educational Programs Are Available!
Many educational programs are available to help
growers understand and implement best management
practices to safely apply pesticides and avoid the
devastating effects of off-site pesticide movement.
Talk to your state extension service, crop adviser, or ag
retailer to find an education program near you.
The continued availability of this new post-emergent
technology depends on everyone making good
management decisions and complying with the pesticide
label.

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Dicamba GE Herbicide Formulation and the New Use Pattern
An important distinction between Engenia, FeXapan, and XtendiMax formulations and older dicamba formulations is that the
new products expand dicamba applications to pre-emergence and post-emergence (over-the-top or directed) applications to GE
dicamba-tolerant cotton and soybeans. Read and follow all applicable directions, restrictions, and precautions on the container
label, booklet provided with the product container, and supplemental labeling. The labeling MUST be in the possession of the
user at the time of pesticide application.
Spray Drift Management
Dicamba GE herbicide formulations require very specific and rigorous spray drift mitigation measures, including:
•	Labeled spray tips and tank mixtures must be followed. These requirements increase spray droplet size, thereby reducing
drift potential. Do not use AMS. Contact the manufacturer or visit its website for the latest information.
•	Applicators are required to ensure that they are aware of the proximity to non-target susceptible crops, and to avoid drift to
these crops.
•	Before making an application, the applicator must survey the application site for neighboring non-target susceptible crops.
The applicator must also consult sensitive crop registries to help identify these crops.
•	DO NOT APPLY these products when the wind is blowing toward sensitive crops. MANY broadleaf crops are far more
sensitive to dicamba than to Roundup.
•	Boom height should not exceed 24 inches above the target;
research has shown drift distances with a 24 inches boom
height may be cut by nearly half of that compared to a boom
height at 50 inches.
•	Applications MUST NOT be made during inversions, often
occurring when winds are less than 3 mph. Also, do not
apply during wind speeds are greater than 15 mph (ideally
less than 10 mph).
•	Sprayer speed can influence spray coverage and drift; do not
exceed 15 mph. Ideal sprayer speeds are 10 mph or less.
•	EPA's analyses of the data show reduced volatility potential
with the newer formulations.
•	Remember - Failure to follow the requirements in the
product label could result in severe injury or destruction to
desirable sensitive broadleaf crops and trees when
contacting their roots, stems, or foliage.
Avoiding ALL Off-Site Movement is the
Responsibility of the Grower/
Producer/ Applicator
The interaction of equipment and the environment
must be monitored to maximize performance and on-
target spray deposition of dicamba GE herbicide
formulations. The applicator is responsible for
considering all of the spray drift factors when applying
a pesticide.
The applicator is also responsible for compliance with
state and local pesticide regulations, including any
state or local pesticide drift regulations.
Know the conditions BEFORE spraying.
Understanding inversions and volatility
potential are critical for proper herbicide use
Courtesy of Jenna Smith, University of Georgia
New dicamba products can be applied post-emergence
Courtesy of Dr. A. Stanley Culpepper, University of Georgia
Herbicide Resistance
Management
New dicamba GE herbicide formulations
require the manufacturer to provide an
active resistance management
stewardship of weed populations. The
continued effectiveness of all dicamba
products depends on successful
implementation of integrated weed
management programs that focus on
diversified weed control tactics.
Read the label provided with dicamba
GE herbicide formulations to learn more
about better management practices
useful for herbicide resistance
management.

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