From labels and weed guides
Group 15 herbicides for russian thistle in soybeans
There are 6 Group 15 active-ingredient groups rated good or excellent for russian thistle in soybeans, with products labeled for soybeans.
Group 15 mode of action (MOA) options
Group 15 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 2 weed guides, 6 active-ingredient groups are rated good or excellent for russian thistle in soybeans.
| Example product | Active ingredients | MOA group | Ratings checked |
|---|---|---|---|
| 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) |
| Prefix EPA 100-1268; same active ingredients on 7 other branded products | fomesafen and metolachlor | 14, 15 | WinField Crop Protection 2026, soybean pp pre: G/E (PDF) |
| ANNIHILATE EPA 279-3601-55467; same active ingredients on 3 other branded products | pyroxasulfone and sulfentrazone | 14, 15 | WinField Crop Protection 2026, soybean pp pre: E (PDF) |
| Fierce EPA 59639-193; same active ingredients on 1 other branded product | flumioxazin and pyroxasulfone | 14, 15 | ND Weed Guide 2026: G-E (PDF); WinField Crop Protection 2026, soybean pp pre: E (PDF) |
| Kyber Pro EPA 59639-236 | flumioxazin, metribuzin, and pyroxasulfone | 5, 14, 15 | ND Weed Guide 2026: G-E (PDF) |
| Zidua PRO EPA 7969-365 | imazethapyr, pyroxasulfone, and saflufenacil | 2, 14, 15 | ND Weed Guide 2026: E (PDF); WinField Crop Protection 2026, soybean burndown: 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.
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Check crop, timing, state, resistance, and rotation in one plan before you make a recommendation.
Sources
Data from current labels and weed guides. Last source update: 2026-07-14.