From labels and weed guides
Best herbicides for annual smartweed in soybeans
For annual smartweed in soybeans, the weed guides list 34 active-ingredient groups rated good or excellent, after checking that the products are labeled for soybeans.
Annual 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, 34 active-ingredient groups are rated good or excellent for annual smartweed in soybeans, showing the top 12 below.
| Example product | Active ingredients | MOA group | Ratings checked |
|---|---|---|---|
| Alligare Dicamba 4 EPA 81927-55; same active ingredients on 28 other branded products | dicamba | 4 | ND Weed Guide 2026: E (PDF) |
| Antares EPA 82534-5-5905; same active ingredients on 19 other branded products | sulfentrazone | 14 | ND Weed Guide 2026: G-E (PDF); WinField Crop Protection 2026, soybean pp pre: G/E (PDF) |
| Agent 1.88 EPA 33270-31; same active ingredients on 16 other branded products | fomesafen | 14 | ND Weed Guide 2026: E (PDF); ND Weed Guide 2026: G-E (PDF); ND Weed Guide 2026: G (PDF); WinField Crop Protection 2026, soybean post: G/E (PDF); WinField Crop Protection 2026, soybean post: G (PDF) |
| Bonedry EPA 82557-1; same active ingredients on 13 other branded products | paraquat | 22 | ND Weed Guide 2026: E (PDF); WinField Crop Protection 2026, soybean burndown: E (PDF) |
| FIRSTSHOT SG EPA 279-9609; same active ingredients on 11 other branded products | thifensulfuron and tribenuron-methyl | 2 | WinField Crop Protection 2026, soybean burndown: E (PDF) |
| Axill Solutions Imazethapyr 2SL EPA 93809-3; same active ingredients on 10 other branded products | imazethapyr | 2 | ND Weed Guide 2026: G (PDF); WinField Crop Protection 2026, soybean burndown: E (PDF); WinField Crop Protection 2026, soybean post: G (PDF) |
| Acifin 2L EPA 82534-2-88783; same active ingredients on 9 other branded products | acifluorfen | 14 | ND Weed Guide 2026: E (PDF); WinField Crop Protection 2026, soybean post: G/E (PDF) |
| Authority Elite EPA 279-3442; same active ingredients on 9 other branded products | metolachlor and sulfentrazone | 14, 15 | ND Weed Guide 2026: G-E (PDF); WinField Crop Protection 2026, soybean pp pre: G (PDF) |
| Basagran EPA 66330-413; same active ingredients on 9 other branded products | bentazon | 6 | ND Weed Guide 2026: E (PDF); WinField Crop Protection 2026, soybean post: E (PDF) |
| Abigor EPA 34704-1174; same active ingredients on 8 other branded products | imazamox | 2 | ND Weed Guide 2026: G-E (PDF); WinField Crop Protection 2026, soybean post: G (PDF) |
| Antares Prime EPA 82534-10-5905; same active ingredients on 8 other branded products | cloransulam-methyl and sulfentrazone | 2, 14 | ND Weed Guide 2026: E (PDF); ND Weed Guide 2026: G-E (PDF); WinField Crop Protection 2026, soybean pp pre: G/E (PDF) |
| Caravel EPA 60063-58; same active ingredients on 7 other branded products | clomazone | 13 | WinField Crop Protection 2026, soybean burndown: E (PDF); WinField Crop Protection 2026, soybean pp pre: 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.