From labels and weed guides
Group 2 herbicides for common ragweed in soybeans
There are 9 Group 2 active-ingredient groups rated good or excellent for common ragweed in soybeans, with products labeled for soybeans.
Group 2 mode of action (MOA) options
Group 2 is a herbicide mode of action (MOA) group. Treat it as one resistance-management check, not as the whole program.
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 5 weed guides, 9 active-ingredient groups are rated good or excellent for common ragweed in soybeans.
| Example product | Active ingredients | MOA group | Ratings checked |
|---|---|---|---|
| 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) |
| Authority Maxx EPA 279-9560; same active ingredients on 5 other branded products | chlorimuron and sulfentrazone | 2, 14 | Ms Weed Guide 2025, ms soybean pre: G (PDF); WinField Crop Protection 2026, soybean pp pre: G (PDF) |
| Classic EPA 352-436; same active ingredients on 4 other branded products | chlorimuron | 2 | Ia Weed Guide 2025, ia soybean post: G-E (PDF); Ms Weed Guide 2025, ms soybean post: G (PDF); Sd Soybean Weed Guide 2026, sd soybean: G (PDF); WinField Crop Protection 2026, soybean post: G (PDF) |
| Herbivore EPA 2749-528-1381; same active ingredients on 3 other branded products | halosulfuron-methyl | 2 | ND Weed Guide 2026: E (PDF); ND Weed Guide 2026: G-E (PDF) |
| Canopy EX EPA 352-635; same active ingredients on 2 other branded products | chlorimuron and tribenuron-methyl | 2 | WinField Crop Protection 2026, soybean pp pre: G (PDF) |
| Flu-Rimuron EPA 85678-48; same active ingredients on 2 other branded products | chlorimuron and flumioxazin | 2, 14 | Ms Weed Guide 2025, ms soybean pre: E (PDF); WinField Crop Protection 2026, soybean pp pre: E (PDF) |
| Autumn Super 51 WDG EPA 264-1134 | iodosulfuron-methyl and thiencarbazone-methyl | 2 | WinField Crop Protection 2026, soybean burndown: E (PDF) |
| Fierce XLT EPA 59639-194 | chlorimuron, flumioxazin, and pyroxasulfone | 2, 14, 15 | Ms Weed Guide 2025, ms soybean pre: G (PDF); WinField Crop Protection 2026, soybean pp pre: E (PDF) |
| Synchrony XP EPA 352-648 | chlorimuron and thifensulfuron | 2 | Sd Soybean Weed Guide 2026, sd soybean: G (PDF); WinField Crop Protection 2026, soybean post: G/E (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.
Build the full program
Check crop, timing, state, resistance, and rotation in one plan before you make a recommendation.
Sources
- Ia Weed Guide 2025 (PDF)
- Ms Weed Guide 2025 (PDF)
- ND Weed Guide 2026 (PDF)
- Sd Soybean Weed Guide 2026 (PDF)
- WinField Crop Protection 2026 (PDF)
Data from current labels and weed guides. Last source update: 2026-07-14.