From labels and weed guides
Best herbicides for smartweed in potato
For smartweed in potato, the weed guides list 4 active-ingredient groups rated good or excellent, after checking that the products are labeled for potato.
Smartweed control in potato
Every listed product is labeled for potato. 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 1 weed guide, 4 active-ingredient groups are rated good or excellent for smartweed in potato.
| Example product | Active ingredients | MOA group | Ratings checked |
|---|---|---|---|
| Actylis Metribuzin EPA 2749-660; same active ingredients on 30 other branded products | metribuzin | 5 | WinField Crop Protection 2026, potato: G (PDF); WinField Crop Protection 2026, potato: E (PDF) |
| Boundary 6.5EC EPA 100-1162; same active ingredients on 13 other branded products | metolachlor and metribuzin | 5, 15 | WinField Crop Protection 2026, potato: G (PDF) |
| AIM EC EPA 279-3241; same active ingredients on 12 other branded products | carfentrazone-ethyl | 14 | WinField Crop Protection 2026, potato: G/E (PDF) |
| Linex 4L EPA 61842-21; same active ingredients on 2 other branded products | linuron | 5 | WinField Crop Protection 2026, potato: 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.