From labels and weed guides
Best herbicides for russian thistle in cowpea
For russian thistle in cowpea, the weed guides list 9 active-ingredient groups with every rating at least 80% control, after checking that the products are labeled for cowpea.
Russian Thistle control in cowpea
Every listed product is labeled for cowpea. 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 1 weed guide, 9 active-ingredient groups are rated at least 80% control for russian thistle in cowpea.
| Example product | Active ingredients | MOA group | Ratings checked |
|---|---|---|---|
| Antares EPA 82534-5-5905; same active ingredients on 16 other branded products | sulfentrazone | 14 | ND Weed Guide 2026: G-E → 80–99% control (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 → 80–99% control (PDF) |
| Bonedry EPA 82557-1; same active ingredients on 8 other branded products | paraquat | 22 | ND Weed Guide 2026: E → 90–99% control (PDF) |
| Abigor EPA 34704-1174; same active ingredients on 7 other branded products | imazamox | 2 | ND Weed Guide 2026: G-Ea → 80–99% control (PDF) |
| Bastante Max EPA 2749-613; same active ingredients on 2 other branded products | bentazon and imazamox | 2, 6 | ND Weed Guide 2026: G-Ea → 80–99% control (PDF) |
| PETRA IMI EPA 89168-49-91395; same active ingredients on 2 other branded products | imazethapyr and sulfentrazone | 2, 14 | ND Weed Guide 2026: G-E → 80–99% control (PDF) |
| Biscayne EPA 91234-102 | bentazon | 6 | ND Weed Guide 2026: G → 80–90% control (PDF) |
| Express EPA 279-9594 | tribenuron-methyl | 2 | ND Weed Guide 2026: Ea → 90–99% control (PDF) |
| Maxunitech Carfentrazone + Sulfentrazone SE EPA 95009-3 | carfentrazone-ethyl and sulfentrazone | 14 | ND Weed Guide 2026: G-E → 80–99% control (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.