From labels and weed guides
Best herbicides for annual smartweed in potato
For annual smartweed in potato, the weed guides list 4 active-ingredient groups with every rating at least 80% control, after checking that the products are labeled for potato.
Annual Smartweed control in potato
Every listed product is labeled for potato. 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, 4 active-ingredient groups are rated at least 80% control for annual smartweed in potato.
| Example product | Active ingredients | MOA group | Ratings checked |
|---|---|---|---|
| Antares EPA 82534-5-5905; same active ingredients on 14 other branded products | sulfentrazone | 14 | ND Weed Guide 2026: G-E → 80–99% control (PDF) |
| Bonedry EPA 82557-1; same active ingredients on 13 other branded products | paraquat | 22 | ND Weed Guide 2026: E → 90–99% control (PDF) |
| Boundary 6.5EC EPA 100-1162; same active ingredients on 13 other branded products | metolachlor and metribuzin | 5, 15 | ND Weed Guide 2026: G → 80–90% control (PDF) |
| Agent 1.88 EPA 33270-31; same active ingredients on 12 other branded products | fomesafen | 14 | ND Weed Guide 2026: G-E → 80–99% control (PDF); ND Weed Guide 2026: G → 80–90% 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.