From labels and weed guides
Best herbicides for smartweed in soybeans
For smartweed in soybeans, the weed guides list 34 active-ingredient groups with every rating at least 80% control, after checking that the products are labeled for soybeans.
Smartweed control in soybeans
Every listed product is labeled for soybeans. 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 5 weed guides, 34 active-ingredient groups are rated at least 80% control for smartweed in soybeans, showing the top 12 below.
| Example product | Active ingredients | MOA group | Ratings checked |
|---|---|---|---|
| 78623 58% Technical Solution EPA 524-532; same active ingredients on 83 other branded products | glyphosate | 9 | Mi Weed Guide 2026 Soybeans, mi soybean post trait glyphosate: G → 80–90% control (FieldMarshal policy interval) (PDF); Sd Soybean Weed Guide 2026, sd soybean: 8 → 80–90% control (PDF); Tn Weed Guide 2026, tn burndown soybean: 7 → 80–90% control (FieldMarshal policy interval) (PDF) |
| Actylis Metribuzin EPA 2749-660; same active ingredients on 32 other branded products | metribuzin | 5 | Ky Weed Guide 2025, ky soybean preemergence: 9 → 80–90% control (FieldMarshal policy interval) (PDF); Mi Weed Guide 2026 Soybeans, mi soybean soil applied: E → 90–100% control (FieldMarshal policy interval) (PDF); Sd Soybean Weed Guide 2026, sd soybean: 8 → 80–90% control (PDF) |
| Actylis Glufosinate 280SL EPA 2749-637; same active ingredients on 31 other branded products | glufosinate | 10 | Mi Weed Guide 2026 Soybeans, mi soybean post trait glufosinate: G → 80–90% control (FieldMarshal policy interval) (PDF); Sd Soybean Weed Guide 2026, sd soybean: 7 → 80–90% control (PDF); Tn Weed Guide 2026, tn burndown soybean: 7 → 80–90% control (FieldMarshal policy interval) (PDF) |
| Alligare Dicamba 4 EPA 81927-55; same active ingredients on 28 other branded products | dicamba | 4 | Tn Weed Guide 2026, tn burndown soybean: 8 → 80–90% control (FieldMarshal policy interval) (PDF) |
| Boundary 6.5EC EPA 100-1162; same active ingredients on 13 other branded products | metolachlor and metribuzin | 5, 15 | Ky Weed Guide 2025, ky soybean preemergence: 9 → 80–90% control (FieldMarshal policy interval) (PDF); Mi Weed Guide 2026 Soybeans, mi soybean soil premix: E → 90–100% control (FieldMarshal policy interval) (PDF); Sd Soybean Weed Guide 2026, sd soybean: 8 → 80–90% control (PDF) |
| Axill Solutions Imazethapyr 2SL EPA 93809-3; same active ingredients on 10 other branded products | imazethapyr | 2 | Ia Weed Guide 2025, ia soybean post: E → 90–100% control (FieldMarshal policy interval) (PDF); Ia Weed Guide 2025, ia soybean pre: G-E → 80–100% control (FieldMarshal policy interval) (PDF); Ky Weed Guide 2025, ky soybean postemergence: 8 → 80–90% control (FieldMarshal policy interval) (PDF); Mi Weed Guide 2026 Soybeans, mi soybean soil applied: G → 80–90% control (FieldMarshal policy interval) (PDF); Mi Weed Guide 2026 Soybeans, mi soybean post: G → 80–90% control (FieldMarshal policy interval) (PDF); Sd Soybean Weed Guide 2026, sd soybean: 7 → 80–90% control (PDF) |
| Acifin 2L EPA 82534-2-88783; same active ingredients on 9 other branded products | acifluorfen | 14 | Ky Weed Guide 2025, ky soybean postemergence: 9 → 80–90% control (FieldMarshal policy interval) (PDF); Mi Weed Guide 2026 Soybeans, mi soybean post: G → 80–90% control (FieldMarshal policy interval) (PDF) |
| Abigor EPA 34704-1174; same active ingredients on 8 other branded products | imazamox | 2 | Ia Weed Guide 2025, ia soybean post: E → 90–100% control (FieldMarshal policy interval) (PDF); Ky Weed Guide 2025, ky soybean postemergence: 9 → 80–90% control (FieldMarshal policy interval) (PDF); Mi Weed Guide 2026 Soybeans, mi soybean post: G → 80–90% control (FieldMarshal policy interval) (PDF); Sd Soybean Weed Guide 2026, sd soybean: 7 → 80–90% control (PDF) |
| Antares Prime EPA 82534-10-5905; same active ingredients on 8 other branded products | cloransulam-methyl and sulfentrazone | 2, 14 | Sd Soybean Weed Guide 2026, sd soybean: 8 → 80–90% control (PDF) |
| Basagran EPA 66330-413; same active ingredients on 8 other branded products | bentazon | 6 | Ia Weed Guide 2025, ia soybean post: E → 90–100% control (FieldMarshal policy interval) (PDF); Mi Weed Guide 2026 Soybeans, mi soybean post: E → 90–100% control (FieldMarshal policy interval) (PDF); Sd Soybean Weed Guide 2026, sd soybean: 9 → 90–99% control (PDF) |
| Ankur EPA 83529-98; same active ingredients on 7 other branded products | cloransulam-methyl | 2 | Ky Weed Guide 2025, ky soybean postemergence: 8 → 80–90% control (FieldMarshal policy interval) (PDF); Mi Weed Guide 2026 Soybeans, mi soybean soil applied: E → 90–100% control (FieldMarshal policy interval) (PDF); Mi Weed Guide 2026 Soybeans, mi soybean post: E → 90–100% control (FieldMarshal policy interval) (PDF); Sd Soybean Weed Guide 2026, sd soybean: 8 → 80–90% control (PDF) |
| Caravel EPA 60063-58; same active ingredients on 7 other branded products | clomazone | 13 | Mi Weed Guide 2026 Soybeans, mi soybean soil applied: 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 Soybeans (PDF)
- Sd Soybean Weed Guide 2026 (PDF)
- Tn Weed Guide 2026 (PDF)
Data from current labels and weed guides. Last source update: 2026-09-30.