From labels and weed guides
Best herbicides for marestail (horseweed) in field corn
For marestail (horseweed) in field corn, the weed guides list 12 active-ingredient groups with every rating at least 80% control, after checking that the products are labeled for field corn.
Marestail (horseweed) control in field corn
Every listed product is labeled for field corn. Ratings are shown when each weed guide that rates this weed has a lower interval bound of at least 80% control for the active-ingredient group. If a guide gives a range, its lower bound must be at least 80%.
Based on 1 weed guide, 12 active-ingredient groups are rated at least 80% control for marestail (horseweed) in field corn.
| Example product | Active ingredients | MOA group | Ratings checked |
|---|---|---|---|
| Comply EPA 100-1414-55467; same active ingredients on 13 other branded products | atrazine, mesotrione, and metolachlor | 5, 15, 27 | Ky Weed Guide 2025, ky corn preemergence: 8 → 80–90% control (FieldMarshal policy interval) (PDF) |
| Enlist Duo EPA 62719-649; same active ingredients on 3 other branded products | 2,4-d and glyphosate | 4, 9 | Ky Weed Guide 2025, ky corn burndown: 8 → 80–90% control (FieldMarshal policy interval) (PDF) |
| Corsican EPA 7969-279-55467; same active ingredients on 2 other branded products | dimethenamid-p and saflufenacil | 14, 15 | Ky Weed Guide 2025, ky corn burndown: 8 → 80–90% control (FieldMarshal policy interval) (PDF) |
| Distinct EPA 7969-150; same active ingredients on 2 other branded products | dicamba and diflufenzopyr | 4, 19 | Ky Weed Guide 2025, ky corn postemergence: 8 → 80–90% control (FieldMarshal policy interval) (PDF) |
| Balance Flexx EPA 264-1067; same active ingredients on 1 other branded product | isoxaflutole | 27 | Ky Weed Guide 2025, ky corn preemergence: 8 → 80–90% control (FieldMarshal policy interval) (PDF) |
| Acuron EPA 100-1466 | atrazine, bicyclopyrone, mesotrione, and metolachlor | 5, 15, 27 | Ky Weed Guide 2025, ky corn preemergence: 8 → 80–90% control (FieldMarshal policy interval) (PDF) |
| Corvus EPA 264-1066 | isoxaflutole and thiencarbazone-methyl | 2, 27 | Ky Weed Guide 2025, ky corn preemergence: 8 → 80–90% control (FieldMarshal policy interval) (PDF) |
| DiFlexx DUO EPA 264-1184 | dicamba and tembotrione | 4, 27 | Ky Weed Guide 2025, ky corn postemergence: 8 → 80–90% control (FieldMarshal policy interval) (PDF) |
| Sharpen EPA 7969-278 | saflufenacil | 14 | Ky Weed Guide 2025, ky corn burndown: 8 → 80–90% control (FieldMarshal policy interval) (PDF); Ky Weed Guide 2025, ky corn preemergence: 8 → 80–90% control (FieldMarshal policy interval) (PDF) |
| Storen EPA 100-1735 | bicyclopyrone, mesotrione, metolachlor, and pyroxasulfone | 15, 27 | Ky Weed Guide 2025, ky corn preemergence: 8 → 80–90% control (FieldMarshal policy interval) (PDF) |
| Surtain EPA 7969-501 | pyroxasulfone and saflufenacil | 14, 15 | Ky Weed Guide 2025, ky corn preemergence: 8 → 80–90% control (FieldMarshal policy interval) (PDF) |
| Trivolt EPA 264-1211 | flufenacet, isoxaflutole, and thiencarbazone-methyl | 2, 15, 27 | Ky Weed Guide 2025, ky corn preemergence: 8 → 80–90% control (FieldMarshal policy interval) (PDF) |
Rating bands: E 90-100%, G 80-89%, F 70-79%, P under 70%, N none. Policy intervals are marked in the source ratings. A range such as G-E means the guide gives a range; 'a' after a rating (e.g., Ga) means the guide assumes its recommended additive. Read the rating method.
Build the full program
Check crop, timing, state, resistance, and rotation in one plan before you make a recommendation.
Sources
Data from current labels and weed guides. Last source update: 2026-09-30.