From labels and weed guides
Best herbicides for smartweed in field corn
For smartweed in field corn, the weed guides list 36 active-ingredient groups with every rating at least 80% control, after checking that the products are labeled for field corn.
Smartweed 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 4 weed guides, 36 active-ingredient groups are rated at least 80% control for smartweed in field corn, showing the top 12 below.
| Example product | Active ingredients | MOA group | Ratings checked |
|---|---|---|---|
| 78623 58% Technical Solution EPA 524-532; same active ingredients on 82 other branded products | glyphosate | 9 | Mi Weed Guide 2026 Corn, mi corn post trait glyphosate: G → 80–90% control (FieldMarshal policy interval) (PDF); Tn Weed Guide 2026, tn burndown corn: 7 → 80–90% control (FieldMarshal policy interval) (PDF) |
| Alligare Dicamba 4 EPA 81927-55; same active ingredients on 35 other branded products | dicamba | 4 | Mi Weed Guide 2026 Corn, mi corn post: E → 90–100% control (FieldMarshal policy interval) (PDF); Tn Weed Guide 2026, tn burndown corn: 8 → 80–90% control (FieldMarshal policy interval) (PDF) |
| AAtrex 4L EPA 100-497; same active ingredients on 31 other branded products | atrazine | 5 | Ia Weed Guide 2025, ia corn pre: E → 90–100% control (FieldMarshal policy interval) (PDF); Ia Weed Guide 2025, ia corn post: E → 90–100% control (FieldMarshal policy interval) (PDF); Ky Weed Guide 2025, ky corn preemergence: 9 → 80–90% control (FieldMarshal policy interval) (PDF); Mi Weed Guide 2026 Corn, mi corn soil applied: G → 80–90% control (FieldMarshal policy interval) (PDF); Mi Weed Guide 2026 Corn, mi corn post: G → 80–90% control (FieldMarshal policy interval) (PDF); Tn Weed Guide 2026, tn corn soil applied: 7 → 80–90% control (FieldMarshal policy interval) (PDF) |
| Actylis Glufosinate 280SL EPA 2749-637; same active ingredients on 31 other branded products | glufosinate | 10 | Mi Weed Guide 2026 Corn, mi corn post trait libertylink: G → 80–90% control (FieldMarshal policy interval) (PDF); Tn Weed Guide 2026, tn burndown corn: 7 → 80–90% control (FieldMarshal policy interval) (PDF) |
| Bicep II Magnum EPA 100-817; same active ingredients on 15 other branded products | atrazine and metolachlor | 5, 15 | Mi Weed Guide 2026 Corn, mi corn soil premix: G → 80–90% control (FieldMarshal policy interval) (PDF) |
| 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: 9 → 80–90% control (FieldMarshal policy interval) (PDF) |
| FIRSTSHOT SG EPA 279-9609; same active ingredients on 10 other branded products | thifensulfuron and tribenuron-methyl | 2 | Mi Weed Guide 2026 Corn, mi corn soil premix p4: E → 90–100% control (FieldMarshal policy interval) (PDF) |
| Artemis EPA 83100-48-91395; same active ingredients on 8 other branded products | mesotrione and metolachlor | 15, 27 | Ky Weed Guide 2025, ky corn preemergence: 8 → 80–90% control (FieldMarshal policy interval) (PDF); Mi Weed Guide 2026 Corn, mi corn soil premix: E → 90–100% control (FieldMarshal policy interval) (PDF); Mi Weed Guide 2026 Corn, mi corn soil premix p4: E → 90–100% control (FieldMarshal policy interval) (PDF) |
| Basagran EPA 66330-413; same active ingredients on 8 other branded products | bentazon | 6 | Ia Weed Guide 2025, ia corn post: E → 90–100% control (FieldMarshal policy interval) (PDF); Mi Weed Guide 2026 Corn, mi corn post: G → 80–90% control (FieldMarshal policy interval) (PDF) |
| Accolade EPA 62719-277-279; same active ingredients on 4 other branded products | flumetsulam | 2 | Ia Weed Guide 2025, ia corn pre: G-E → 80–100% control (FieldMarshal policy interval) (PDF); Mi Weed Guide 2026 Corn, mi corn soil applied: G → 80–90% control (FieldMarshal policy interval) (PDF) |
| Broadleaf Blend EPA 5481-678; same active ingredients on 4 other branded products | clopyralid and flumetsulam | 2, 4 | Ia Weed Guide 2025, ia corn pre: G-E → 80–100% control (FieldMarshal policy interval) (PDF); Ia Weed Guide 2025, ia corn post: G-E → 80–100% control (FieldMarshal policy interval) (PDF); Mi Weed Guide 2026 Corn, mi corn soil premix: G → 80–90% control (FieldMarshal policy interval) (PDF); Mi Weed Guide 2026 Corn, mi corn post premix: G → 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 | Mi Weed Guide 2026 Corn, mi corn post trait enlist: G → 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.
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Sources
- Ia Weed Guide 2025 (PDF)
- Ky Weed Guide 2025 (PDF)
- Mi Weed Guide 2026 Corn (PDF)
- Tn Weed Guide 2026 (PDF)
Data from current labels and weed guides. Last source update: 2026-09-30.