From labels and weed guides
Best herbicides for annual smartweed in alfalfa
For annual smartweed in alfalfa, the weed guides list 6 active-ingredient groups rated good or excellent, after checking that the products are labeled for alfalfa.
Annual Smartweed control in alfalfa
Every listed product is labeled for alfalfa. 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, 6 active-ingredient groups are rated good or excellent for annual smartweed in alfalfa.
| Example product | Active ingredients | MOA group | Ratings checked |
|---|---|---|---|
| Bonedry EPA 82557-1; same active ingredients on 13 other branded products | paraquat | 22 | ND Weed Guide 2026: E (PDF) |
| Axill Solutions Imazethapyr 2SL EPA 93809-3; same active ingredients on 10 other branded products | imazethapyr | 2 | ND Weed Guide 2026: G (PDF) |
| Abigor EPA 34704-1174; same active ingredients on 8 other branded products | imazamox | 2 | ND Weed Guide 2026: G-E (PDF) |
| Broclean EPA 34704-891; same active ingredients on 5 other branded products | bromoxynil | 6 | ND Weed Guide 2026: G-E (PDF) |
| Basagran 5L EPA 7969-112 | bentazon | 6 | ND Weed Guide 2026: E (PDF) |
| Sharpen EPA 7969-278 | saflufenacil | 14 | ND Weed Guide 2026: 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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Sources
Data from current labels and weed guides. Last source update: 2026-07-14.