Table 2.2-14. Postemergence herbicide application restrictions for corn
| Herbicide | Over-the-top application | Use of drop nozzles | Comments |
|---|---|---|---|
| 2,4-D | <8" tall | 0.5 pt—8" to 36" tall | Some 2,4-D formulations allow application up to tasseling. |
| Accent/ Accent Q | 20" tall (free-standing) or <6 collars (V6 stage) | 20" to 36" tall or V6 to V10 stage | — |
| Aim | Up to 8-leaf collar stage (V8) | Up to 14-leaf collar stage | Use drop nozzles or directed sprayers that target weeds but spray away from the corn whorl. |
| Atrazine | 12" tall | — | — |
| Banvel or Clarity | 1 pt—8" tall or 5 leaves 0.5 pt—8" to 36" tall or 15 days before tassel emergence | — | Do not apply Banvel or Clarity near soybeans if corn is >24" tall, or if soybeans are >10" tall or have begun to bloom. |
| Basagran | No restrictions | — | — |
| Basis Blend |
Spike to 4 leaves (2 collars) or 0.5" to 6" tall | — | Do not apply to corn >6" tall or having 3 collars |
| Beacon | 4" to 20" tall (free-standing) | For splits, 20" tall to before tassel emergence | — |
| Buctril | 1 pt—emergence to tassel 1.5 pts—4 leaves to tassel | — | Postemergence application before 3-leaf stage may result in corn leaf burn. |
| Buctril + atrazine | 1.5 to 2 pts—emergence to 12" tall 3 pt—4 leaves to <12" tall | — | Postemergence application before 3-leaf stage may result in corn leaf burn. |
| Cadet |
Up to 48 inches tall |
When necessary |
Apply before tasseliing |
| Callisto | Up to 30" tall (or 8-corn leaf stage) | — | — |
| Callisto Xtra | 12" tall | — | — |
| Capreno | Up to V6 (6 collars) | to V7 (7 collars) | — |
| Celebrity Plus | 4" to 24" tall (free standing) or <6 collars (V6 stage) | When necessary | — |
| Curtail | <8" tall | — | — |
| Distinct | 4" to 24" tall | 24" to 30" tall | Up to 2 weeks before tassel emergence. |
| Equip | Up to 12" tall | >12" to 36" (>V4 but <V8 growth stage) | — |
| Glyphosate products | Up to 30" tall (V8 stage) | — | Apply to Roundup Ready hybrids only. |
| Halex GT | Emergence to 30" tall (8-leaf stage) | — | — |
| Harmony SG | 2 to 6 leaves up to 12" tall (1 to 4 collars) | — | Do not apply to corn >12" tall or having 4 collars. |
| Hornet | Emergence up to 20" tall (V6) | 20" to 36" tall (V6) | — |
| Impact/Armezon | Up to 45 days prior to corn harvest | When necessary | — |
| Laddok S-12 | Spike to 7 leaves or up to 12" tall | — | — |
| Laudis | Emergence up to V8 stage | — | — |
| Liberty 280 | Emergence to V5 (5 developed collars) | >20" to36" tall | Apply to Liberty Link or GR corn hybrids only. |
| Lightning | Up to 20" tall | When necessary | Apply to IMI or CL corn hybrids only. Do not apply within 45 days of corn harvest. |
| Marksman | Emergence to 5-leaf stage or up to 8" tall | — | — |
| Metribuzin |
Emergence to pretassel |
When necessary |
See tank-mix partner |
| NorthStar | 4" to 20" or 6 collars | >20" to 30" tall | — |
| Option | Emergence to 16" (V5 stage) | >16" to 36" tall | — |
| Peak | 4" to 30" tall (6 collars) | When necessary | — |
| Permit |
Spike to 48" tall | When necessary | If tank-mixed: with 2,4-D, apply to corn up to 8" tall; with Banvel or Clarity, apply to corn up to 36" tall. |
Permit Plus |
2- to 6-leaf corn (1-5 collars) |
— |
Do not apply to corn with more than 6 leaves (5 collars) |
| Realm Q |
Up to 20 inches tall but with no more than 6 collars |
— |
— |
| Resolve | Up to 12" tall (<6 collars) | — | — |
| Resolve Q | Up to 20" tall | — | — |
| Resource | 2-leaf to 10-leaf stage (collars must be visible) | When necessary, to direct below corn leaves | — |
| Roundup products | Up to 30" tall (V8 stage) | — | Apply to Roundup Ready hybrids only. |
| Shotgun | Spike to 4 leaves or up to 8" tall | 5 leaves or 8" to 12" tall | — |
| Spirit | 4" to 20" tall or 6 collars | >20" to 24" tall | — |
| Status | 4" to 36" tall (V2–V10) | — | Do not apply within 15 days before tassel emergence. |
| Steadfast/ Steadfast Q | Up to 20" tall (6 collars) | — | Best if applied when corn is <12" tall. |
| Steadfast ATZ | Up to 12" tall (6 collars) | — | — |
| Stout | Up to 16" tall (<6 collars) | — | — |
| Touchdown | Emergence through V8 stage | — | Apply to Roundup Ready hybrids only. |
| Yukon | Spike to 36" tall | When necessary | — |
