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Dicamba Herbicide Updates




Dicamba containing herbicides have been in the news and under review by state and federal pesticide regulators since 2017, based on excessively high numbers of off-target movement (drift and volatilization) complaints.

This website is intended to provide interested parties with regulatory and other related information associated with dicamba herbicides in Indiana.



  1. 2022 Dicamba Frequently Asked Questions (FAQs) (pdf, 202kb)
  2. EPA releases summary of Dicamba-Related incident reports from the 2021 Growing Season (pdf, 147kb)
  3. Dicamba Highly Volatile Herbicide (HVH) Frequently Asked Questions (01-06-22) (pdf, 351kb)
  4. Highly Volatile Herbicide (HVH) final determination (pdf, 1.2MB)
  5. List of Dicamba RUPs in Indiana (02-10-22) (pdf, 100kb)
  6. Field Watch and CropCheck Mapping Use (source: Progressive Farmer)
  7. Corteva to Discontinue Sales of FeXapan Herbicide (pdf, 240kb)
  8. 2020 EPA Dicamba Registration Frequently Asked Questions (source: EPA)
  9. EPA Rejects NC 24c Spray Date Extension (pdf, 2MB)
  10. Ground Truthing Weather Apps for Wind Speed and Temperature Inversions
  11. Restricted Use Classification of Dicamba Containing Herbicides
  12. Removing Herbicide Residues from Agricultural Application Equipment (How Proper Cleaning Helps Prevent Crop Damage and Improves Performance)
  13. Response of Roundup Ready Soybean Yield to Dicamba Exposure (source: Purdue Extension)
  14. Response of Glyphosate-Tolerant Soybean Yield Components to Dicamba Exposure (source: ResearchGate)
  15. DriftWatch Sensitive Crop/Site Registry (source: DriftWatch)
  16. What Have We Learned from Four Years of Studying Temperature Inversions? (source: University of Missouri)
  17. Five Things We've Learned About Dicamba (source: University of Missouri)
  18. Dicamba Losses to Air after Applications to Soybean under Stable and Nonstable Atmospheric Conditions (pdf, 3.1MB)
  19. Inversion Climatology in High-Production Agricultural Regions of Missouri and Implications for Pesticide Applications (pdf, 12.8MB)