From labels and weed guides
Best herbicides for witchgrass in alfalfa
For witchgrass in alfalfa, the weed guides list 6 active-ingredient groups with every rating at least 80% control, after checking that the products are labeled for alfalfa.
Witchgrass control in alfalfa
Every listed product is labeled for alfalfa. 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, 6 active-ingredient groups are rated at least 80% control for witchgrass in alfalfa.
| Example product | Active ingredients | MOA group | Ratings checked |
|---|---|---|---|
| ABUNDIT Edge EPA 352-922; same active ingredients on 81 other branded products | glyphosate | 9 | Mi Weed Guide 2026 Forage, mi forage glyphosate resistant alfalfa: E → 90–100% control (FieldMarshal policy interval) (PDF) |
| Arrow 2EC EPA 66222-60; same active ingredients on 36 other branded products | clethodim | 1 | Mi Weed Guide 2026 Forage, mi forage seedling legumes: E → 90–100% control (FieldMarshal policy interval) (PDF) |
| Actylis Metribuzin EPA 2749-660; same active ingredients on 29 other branded products | metribuzin | 5 | Mi Weed Guide 2026 Forage, mi forage established alfalfa: G → 80–90% control (FieldMarshal policy interval) (PDF) |
| Acumen EPA 241-337-55467; same active ingredients on 17 other branded products | pendimethalin | 3 | Mi Weed Guide 2026 Forage, mi forage seedling legumes: G → 80–90% control (FieldMarshal policy interval) (PDF) |
| Epitome EPA 2749-636; same active ingredients on 3 other branded products | eptc | 15 | Mi Weed Guide 2026 Forage, mi forage seedling legumes: E → 90–100% control (FieldMarshal policy interval) (PDF) |
| Venturous 3ME EPA 524-591-55467; same active ingredients on 1 other branded product | acetochlor | 15 | Mi Weed Guide 2026 Forage, mi forage seedling legumes: E → 90–100% control (FieldMarshal policy interval) (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.