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2020 Auxin Specific Applicator Training
Requirements summary for use of approved dicamba and 2,4-D herbicides
Scott Nolte, Texas A&M AgriLife Extension, College Station, TX
Peter Dotray, Texas A&M AgriLife Extension, Lubbock, TX
Joshua McGinty, Texas A&M AgriLife Extension, Corpus Christi, TX

The revised dicamba labels (Engenia, FeXapan, Tavium and Xtendimax) state that only certified applicators may apply these herbicides. Tavium® Plus VaporGrip® Technology, a dicamba premix with s-metolachlor, received a Federal label in 2019 and is the fourth approved dicamba for use in dicamba-tolerant cotton. These dicamba products are Restricted
Use Pesticides (RUP) in addition to being State Limited Use (SLU) and require Auxin Specific Applicator Training annually prior to use.

In addition, the Texas Department of Agriculture (TDA) has added 2,4-D Choline formulations (Enlist Duo® and Enlist OneTM) for use on 2,4-D tolerant crops to be included in these mandatory Auxin trainings. These 2,4-D herbicides are SLU pesticides, and they can be sold to and used only by certified applicators or those working under the supervision of a certified applicator. Annual auxin training is also required prior to their use. This handout contains resources for products, Environmental Protection Agency (EPA) and TDA websites, along with a summary of the application requirements for use of these products. This is not a substitution for completing the certified applicator training or completing the 2020 Auxin Specific Applicator training. Always read and follow the pesticide label and website restrictions and requirements.

Website Resources
Product websites for application requirements, approved nozzles or approved tank-mixes
• Engenia® herbicide: www.engeniastewardship.com
• Xtendimax® herbicide:
• FeXapan® herbicide:
• Tavium® herbicide:
• Enlist One™ / Enlist Duo®:
www.xtendimaxapplicationrequirements.com
www.fexapanapplicationrequirements.dupont.com
www.Taviumtankmix.com
www.enlisttankmix.com

EPA Contact information about dicamba use restrictions for corresponding endangered species
• EPA Endangered Species Website: www.epa.gov/espp
• EPA phone number: 1-844-447-3813

Texas Department of Ag website for approved 24c labels:
https://www.texasagriculture.gov/RegulatoryPrograms/Pesticides/Section18Exemptions/24cSpecialLocalNeeds.aspx
24c Labels for Engenia, Xtendimax, and FeXapan are approved and available for use. Tavium does not have a 24c label.
– You must have the original full label and the 24c label in hand to make applications under the modified restrictions
– Allows applications to be made between sunrise and sunset as long as no inversion conditions exist.
– Allows applications to cotton up to 90 days after planting or until mid-bloom, whichever comes first.
– The 24c labels expire on 12/20/2020 and must not be used or distributed after this date.

soilcrop.tamu.edu