From labels and weed guides
Best herbicides for smartweed in soybeans
For smartweed in soybeans, the weed guides list 18 active-ingredient groups rated good or excellent, 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 stays at good or excellent for the active-ingredient group. If a guide gives a range, the weaker end of the range has to be good or excellent.
Based on 2 weed guides, 18 active-ingredient groups are rated good or excellent 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 84 other branded products | glyphosate | 9 | Sd Soybean Weed Guide 2026, sd soybean: G (PDF) |
| Actylis Metribuzin EPA 2749-660; same active ingredients on 32 other branded products | metribuzin | 5 | Sd Soybean Weed Guide 2026, sd soybean: G (PDF) |
| Actylis Glufosinate 280SL EPA 2749-637; same active ingredients on 31 other branded products | glufosinate | 10 | Sd Soybean Weed Guide 2026, sd soybean: G (PDF) |
| Agent 1.88 EPA 33270-31; same active ingredients on 16 other branded products | fomesafen | 14 | Sd Soybean Weed Guide 2026, sd soybean: G (PDF) |
| Boundary 6.5EC EPA 100-1162; same active ingredients on 13 other branded products | metolachlor and metribuzin | 5, 15 | Sd Soybean Weed Guide 2026, sd soybean: G (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 (PDF); Ia Weed Guide 2025, ia soybean pre: G-E (PDF); Sd Soybean Weed Guide 2026, sd soybean: G (PDF) |
| Basagran EPA 66330-413; same active ingredients on 9 other branded products | bentazon | 6 | Ia Weed Guide 2025, ia soybean post: E (PDF); Sd Soybean Weed Guide 2026, sd soybean: E (PDF) |
| Abigor EPA 34704-1174; same active ingredients on 8 other branded products | imazamox | 2 | Ia Weed Guide 2025, ia soybean post: E (PDF); Sd Soybean Weed Guide 2026, sd soybean: G (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: G (PDF) |
| Ankur EPA 83529-98; same active ingredients on 7 other branded products | cloransulam-methyl | 2 | Sd Soybean Weed Guide 2026, sd soybean: G (PDF) |
| Prefix EPA 100-1268; same active ingredients on 7 other branded products | fomesafen and metolachlor | 14, 15 | Sd Soybean Weed Guide 2026, sd soybean: G (PDF) |
| Accolade EPA 62719-277-279; same active ingredients on 4 other branded products | flumetsulam | 2 | Ia Weed Guide 2025, ia soybean pre: G-E (PDF); Sd Soybean Weed Guide 2026, sd soybean: G (PDF) |
Rating legend: E=excellent, G=good, F=fair, P=poor, N=no control. 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.
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Sources
Data from current labels and weed guides. Last source update: 2026-07-14.