Every other herbicide label says something like "use a nozzle that minimizes drift." The auxin labels are different: dicamba over-the-top (OTT) and Enlist One / Enlist Duo labels require a specific ASABE droplet category and list, by model and pressure, the nozzles that are allowed to produce it. Run the wrong tip and you're off-label, whatever the pattern looks like. Here's what the 2026 labels say and how to pick a tip that meets them — or run the Nozzle Selector, choose Herbicide → Systemic, and it will shortlist the coarse-droplet tips we have on the shelf.
1. What changed for 2026
EPA approved new OTT dicamba registrations for dicamba-tolerant soybean and cotton for the 2026 and 2027 seasons: Engenia (BASF), Stryax (Bayer — the successor to XtendiMax) and Tavium (Syngenta). The headline restrictions on the new labels:
- Droplet size: coarse (341–403 µm) or coarser. Fine and medium droplets are off-label, full stop.
- Wind: 3–10 mph at boom height, and never toward a sensitive crop.
- Boom height: no more than 24 inches above the ground or crop canopy.
- Downwind buffer: 240 ft, with label-approved mitigations that can reduce it.
- Timing: not after June 30 or R1, whichever comes first; not within one hour after sunrise or two hours before sunset; not within 48 hours of forecast rain.
- Heat: restrictions kick in at an 85–95°F forecast and applications stop at 95°F.
State registrations vary and the label in your hand is the one that counts — read the nozzle and buffer sections before you fill the tank. The Enlist One and Enlist Duo labels have their own approved-nozzle lists and also require coarse-or-coarser droplets, with a similar wind and boom-height regime.
2. Why the tip style matters more than the size
Droplet size is set by the tip's design and the pressure you run, not by its capacity number. An XR11004 and a TTI11004 both flow 0.40 GPM at 40 psi, but the XR makes a fine-to-medium droplet and the TTI makes a very coarse to extra coarse one. The auxin labels are, in effect, telling you which family of tip to run:
- TTI (Turbo TeeJet Induction) — TeeJet's most drift-resistant broadcast tip. Very coarse at 20–40 psi, extra coarse above that, across its whole 20–90 psi range. It appears on every auxin approved-nozzle list we've seen and is the default choice for dicamba work.
- AIXR (Air Induction XR) — coarse to very coarse. On the approved lists for many auxin products, but usually only within a specified pressure window (check the label — running it too high drops you into medium).
- TT (Turbo TeeJet) and XR — medium at most working pressures. Fine for glyphosate or a contact product; not compliant for dicamba or Enlist.
The labels list nozzles by exact model, orifice size and pressure range (for example, a tip may be approved only from 40 to 60 psi). Match all three. The TeeJet tip pages on our site show the droplet category at each pressure, so you can confirm it against the label's table.
3. Sizing a TTI for your rig
Same formula as any tip: GPM per nozzle = (GPA × MPH × spacing) ÷ 5,940. Dicamba labels set a minimum spray volume — typically 15 GPA — and coverage is better at that volume with a coarse droplet anyway, so plan on 15 GPA or more. Example: 15 GPA at 12 mph on 20-inch spacing needs 0.61 GPM per nozzle, which is a TTI11006 at about 40 psi. Aim to land in the middle of the label's approved pressure window for that tip, so the rate controller has room in both directions without leaving it.
Two things people miss: TTI tips need more pressure than a standard flat fan to form a pattern (don't run one below 20 psi hoping for a coarser droplet), and a rate controller chasing a big speed change will push pressure right out of the approved window. If you run 8 mph on headlands and 14 in the open, that's about a 3× pressure swing on one tip — either narrow your speed range or fit a pulse-width-modulation system that holds pressure constant.
4. The rest of the setup
- Boom at 24 inches or less above the target. Most 110° tips are designed for 20-inch spacing at a 20–24 inch height; running higher to "even out the pattern" is both off-label and a drift generator.
- Keep the approved drift-reduction agent (DRA) and volatility-reduction agent (VRA) in the mix where the label calls for them — the nozzle is one leg of the requirement, not the whole thing.
- Clean the sprayer to the label's triple-rinse procedure before and after. Dicamba residue in the next load of a contact herbicide on non-tolerant beans is the classic self-inflicted injury.
- Record the nozzle model, pressure, wind speed and direction, boom height and time for each field. The 2026 labels require applicator records, and they're your defense if a neighbor's beans cup.
5. Get the tips
We stock TTI and AIXR in the common sizes, in polymer (VP) and ceramic (VK). Run the Nozzle Selector with your rate, speed and spacing, pick Herbicide and Systemic, and it will list what fits with live stock and a link to buy. Or browse TeeJet spray tips directly. If you're unsure whether a tip on our shelf is on your label's list, call (509) 838-2209 with the product name and we'll check it with you.
Spray Center Electronics is an authorized TeeJet dealer in Spokane, WA. Label requirements summarized here are from the 2026 federal OTT dicamba registrations as reported by university extension; state labels and future amendments may differ. The product label is the law — always follow the label in hand.