Dicamba Training in Iowa

WEATHER NOTICE - Please check with the contact at your specific training location in the event of inclement weather. This website is not an instantaneous source for event cancellations.

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In person training for the 2020 crop year will take place during January and February. Online training will begin in January.


Dicamba-based products are restricted use pesticides. Iowa requires users to be registered as certified applicators in the state. Additionally, applicators must complete training every year before they apply dicamba-based products.
Note: Dicamba training is also referred to by it's official title of auxin training.

Click here to jump to LIVE TRAINING information

Click here to jump to ONLINE TRAINING information

Links to access online training options are listed below.


Online training from one provider qualifies as dicamba/auxin training for all dicamba-based products. Online training is not available until after January 1, 2020.

Bayer Crop Science -

Bayer Online Training


BASF Online Training

Corteva Agriscience -

Corteva Online Training

Syngenta -

Syngenta Online Training

Links to registration for in person training are listed below.


Calendar provides information only.

Training for dicamba in Iowa is provided by the product manufacturer. Training from one provider qualifies as dicamba/auxin training for all dicamba-based products.

Registration Links

Click a link below to register for a specific public training session.

BASF - Register online to attend 

Corteva Agriscience - Register online to attend

Bayer Crop Sciences - Register online to attend

Syngenta - No In Person Training Events

Upcoming Live Training Events

There are no upcoming events.


For full information about any products, visit the manufacturer's page to review the product label.

EPA worked with pesticide manufacturers, farmers, state regulators, and other stakeholders to develop the following label changes for over-the-top use of dicamba on dicamba-tolerant cotton and soybeans through the 2020 growing season:

  • Only certified applicators may apply dicamba over the top (those working under the supervision of a certified applicator may no longer make applications)
  • In counties where endangered species may exist, the downwind buffer will remain at 110 feet and there will be a new 57-foot buffer around the other sides of the field (the 110-foot downwind buffer applies to all applications, not just in counties where endangered species may exist)
  • Enhanced label to improve applicator awareness on the impact of low pH’s on the potential volatility of dicamba
  • Prohibit over-the-top application of dicamba on soybeans 45 days after planting after planting
  • Applications will be allowed only from 1 hour after sunrise to 2 hours before sunset
  • Enhanced tank clean-out instructions for the entire system
  • Label clean up and consistency to improve compliance and enforceability
  • Clarify training period for 2019 and beyond, ensuring consistency across all three products

Link to the US Environmental Protection Agency dicamba page: https://www.epa.gov/ingredients-used-pesticide-products/registration-dicamba-use-dicamba-tolerant-crops


Manufacturers of dicamba products will be providing training which will include the following topics:

  1. Keeping up with changes in tank mix partners– Are there differences between the lists of approved tank mix partners for each dicamba formulation, and what uses are approved beyond over the top applications?
  2. Review of record-keeping requirements from the label including use of buffers, sprayer system cleanout, tank mix partners, wind speed and direction, start/end time, and weather conditions (including temperature inversion) during the start and end times.
  3. Iowa certification requirements to apply, mix, load, or transport Engenia, Fexapan, XtendiMax, and/or Tavium products– Handlers vs. Certified applicators.
  4. Notification and communication requirements on the label such as field surveys, sensitive crops (soybeans), and sensitive areas. Include the use of voluntary tools such as the FieldWatch online registry.
  5. Best management practices to time applications for early crop growth stage, weed height/efficacy, and weather conditions.
  6. The use of buffers to reduce pesticide exposure to nontarget areas including non-dicamba-tolerant soybeans.

Product Labels and Information

Below are links to the official product pages, which include access to product labels and additional information about each product.

BASF - Engenia®

Bayer - XtendiMax®

Corteva - FeXapan

Syngenta - Tavium®