From labels and weed guides
Best herbicides for pennsylvania smartweed in soybeans
For pennsylvania smartweed in soybeans, the weed guides list 42 active-ingredient groups with every rating at least 80% control, after checking that the products are labeled for soybeans.
Pennsylvania 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 2 weed guides, 42 active-ingredient groups are rated at least 80% control for pennsylvania 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 | Ks Weed Guide 2026, ks soybean post: E → 90–100% control (FieldMarshal policy interval) (PDF); Ms Weed Guide 2025, ms soybean post: 8 → 80–90% control (FieldMarshal policy interval) (PDF) |
| 2,4-D Amine 4 EPA 1381-103; same active ingredients on 76 other branded products | 2,4-d | 4 | Ks Weed Guide 2026, ks soybean post: G-E → 80–100% control (FieldMarshal policy interval) (PDF) |
| Actylis Metribuzin EPA 2749-660; same active ingredients on 32 other branded products | metribuzin | 5 | Ks Weed Guide 2026, ks soybean pre: G → 80–90% control (FieldMarshal policy interval) (PDF); Ms Weed Guide 2025, ms soybean post directed: 7 → 80–90% control (FieldMarshal policy interval) (PDF); Ms Weed Guide 2025, ms soybean pre: 9 → 90–100% control (FieldMarshal policy interval) (PDF) |
| Actylis Glufosinate 280SL EPA 2749-637; same active ingredients on 31 other branded products | glufosinate | 10 | Ms Weed Guide 2025, ms soybean post: 9 → 90–100% control (FieldMarshal policy interval) (PDF) |
| Axill Solutions Flumi 51% WDG EPA 95055-14-93809; same active ingredients on 28 other branded products | flumioxazin | 14 | Ms Weed Guide 2025, ms soybean pre: 9 → 90–100% control (FieldMarshal policy interval) (PDF) |
| Agent 1.88 EPA 33270-31; same active ingredients on 16 other branded products | fomesafen | 14 | Ms Weed Guide 2025, ms soybean pre: 7 → 80–90% control (FieldMarshal policy interval) (PDF); Ms Weed Guide 2025, ms soybean post: 7 → 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 | Ms Weed Guide 2025, ms soybean pre: 9 → 90–100% control (FieldMarshal policy interval) (PDF) |
| Axill Solutions Imazethapyr 2SL EPA 93809-3; same active ingredients on 10 other branded products | imazethapyr | 2 | Ks Weed Guide 2026, ks soybean pre: G → 80–90% control (FieldMarshal policy interval) (PDF); Ks Weed Guide 2026, ks soybean post: G → 80–90% control (FieldMarshal policy interval) (PDF) |
| Acifin 2L EPA 82534-2-88783; same active ingredients on 9 other branded products | acifluorfen | 14 | Ms Weed Guide 2025, ms soybean post: 7 → 80–90% control (FieldMarshal policy interval) (PDF) |
| Authority Elite EPA 279-3442; same active ingredients on 9 other branded products | metolachlor and sulfentrazone | 14, 15 | Ks Weed Guide 2026, ks soybean pre: G → 80–90% control (FieldMarshal policy interval) (PDF); Ms Weed Guide 2025, ms soybean pre: 9 → 90–100% control (FieldMarshal policy interval) (PDF) |
| Abigor EPA 34704-1174; same active ingredients on 8 other branded products | imazamox | 2 | Ks Weed Guide 2026, ks soybean post: E → 90–100% control (FieldMarshal policy interval) (PDF) |
| Antares Prime EPA 82534-10-5905; same active ingredients on 8 other branded products | cloransulam-methyl and sulfentrazone | 2, 14 | Ms Weed Guide 2025, ms soybean pre: 9 → 90–100% 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
Data from current labels and weed guides. Last source update: 2026-09-30.