Dicamba & Paraquat Training Requirements for 2026:
Over‑the‑Top Dicamba Use on Dicamba‑Tolerant Soybeans (2026)
Three over‑the‑top dicamba products are state‑registered in Ohio for use on dicamba‑tolerant soybeans during the 2026 growing season:
Who May Apply Dicamba?
- Only licensed commercial or private applicators may apply these restricted‑use dicamba products.
- Unlicensed applicators may NOT apply dicamba, even under the supervision of a licensed applicator.
Required Application Conditions
- Adjuvants (required): Every OTT dicamba application must include a Drift Reduction Agent (DRA, 0.3% v/v) and a qualified pH‑buffering Volatility Reduction Agent (VRA); check each registrant site for the current qualified VRA list.
- Application windows (per label):
- Stryax & Engenia: max 2 apps (0.5 lb a.e. dicamba each); soybeans through R1; cotton up to 7 days pre‑harvest.
- Tavium: max 2 apps at 3.53 pt/A (0.5 lb a.e. dicamba + 1.0 lb s‑metolachlor); soybeans through V4; cotton through 6‑leaf.
- Buffers, wind, timing: 240‑ft downwind buffer (reducible with qualified practices), wind 3–10 mph, no inversions, daytime only (1 hr after sunrise to 2 hrs before sunset).
- Temperature limits: No applications ≥95°F; additional limits at 85–<95°F (e.g., treat ≤50% of DT acres per county per day).
- State‑specific labeling: Applicators must check the registrant site within 7 days before application for any Ohio‑specific additions (these websites are part of the labeling and must be followed):
Required Dicamba Training (Annual)
All applicators must complete one dicamba‑specific training course each calendar year.
The required training is not included on product labels, so applicators must use one of these registrant‑provided trainings:
- Bayer Stewardship - Dicamba Training & Resources
- 2026 Tavium Training - Syngenta E-Learning Modules
- https://www.engeniaherbicide.com/training.html
Label & ESA Compliance Requirements
Applicators must follow:
- All label requirements, including ESA/Bulletins Live! 2 and the Mitigation Menu.
- Ohio Administrative Code Rule 901:5‑11‑10 pesticide‑application recordkeeping requirements.
- Additional EPA dicamba protections for over‑the‑top use published by the U.S. EPA.
For help navigating Bulletins Live!, applicators may contact the OSU PSEP office.
Additional ESA Resource
Alyssa Essman’s OSU Extension factsheet on complying with ESA requirements is available here:
https://ohioline.osu.edu/factsheet/anr-0222
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Precautions for Dicamba Use in Xtend Soybeans (Purdue Extension Factsheet)
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Dicamba Training Requirements — Frequently Asked Questions
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Recordkeeping Template
Dicamba-Specific Training Information
Ohio accepts training sessions led by the product registrants (BASF, Bayer, Syngenta). This includes webinars and online courses offered by the companies, as well as their in-person trainings. Ohio will also accept training from IN, KY, MI, PA & WV.