From labels and weed guides
Best herbicides for common barnyardgrass in alfalfa
For common barnyardgrass in alfalfa, the weed guides list 11 active-ingredient groups with every rating at least 80% control, after checking that the products are labeled for alfalfa.
Common Barnyardgrass 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 4 weed guides, 11 active-ingredient groups are rated at least 80% control for common barnyardgrass 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 | Ks Weed Guide 2026, ks alfalfa post: G → 80–90% control (FieldMarshal policy interval) (PDF); Mi Weed Guide 2026 Forage, mi forage glyphosate resistant alfalfa: E → 90–100% control (FieldMarshal policy interval) (PDF); ND Weed Guide 2026: E → 90–99% control (PDF); ND Weed Guide 2026: G → 80–90% control (PDF) |
| Arrow 2EC EPA 66222-60; same active ingredients on 36 other branded products | clethodim | 1 | Ks Weed Guide 2026, ks alfalfa post: E → 90–100% control (FieldMarshal policy interval) (PDF); Mi Weed Guide 2026 Forage, mi forage seedling legumes: E → 90–100% control (FieldMarshal policy interval) (PDF); ND Weed Guide 2026: E → 90–99% control (PDF) |
| Acumen EPA 241-337-55467; same active ingredients on 17 other branded products | pendimethalin | 3 | Ks Weed Guide 2026, ks alfalfa post to alfalfa pre to weeds: E → 90–100% control (FieldMarshal policy interval) (PDF); Mi Weed Guide 2026 Forage, mi forage seedling legumes: G → 80–90% control (FieldMarshal policy interval) (PDF); ND Weed Guide 2026: E → 90–99% control (PDF) |
| Aceto Trifluralin 4EC EPA 2749-561; same active ingredients on 13 other branded products | trifluralin | 3 | Ks Weed Guide 2026, ks alfalfa post to alfalfa pre to weeds: E → 90–100% control (FieldMarshal policy interval) (PDF); ND Weed Guide 2026: E → 90–99% control (PDF) |
| Bonedry EPA 82557-1; same active ingredients on 13 other branded products | paraquat | 22 | ND Weed Guide 2026: G → 80–90% control (PDF) |
| Assure II EPA 352-541; same active ingredients on 3 other branded products | quizalofop-p-ethyl | 1 | ND Weed Guide 2026: E → 90–99% control (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); ND Weed Guide 2026: E → 90–99% control (PDF); WinField Crop Protection 2026, alfalfa forage legumes: E → 91–100% control (PDF) |
| PAVILION MTZ EPA 89167-88-89391; same active ingredients on 1 other branded product | metribuzin and pendimethalin | 3, 5 | Ks Weed Guide 2026, ks alfalfa dormant: G-E → 80–100% control (FieldMarshal policy interval) (PDF) |
| Velpar AlfaMax EPA 61842-45; same active ingredients on 1 other branded product | diuron and hexazinone | 5 | Ks Weed Guide 2026, ks alfalfa dormant: G-E → 80–100% control (FieldMarshal policy interval) (PDF); Ks Weed Guide 2026, ks alfalfa dormant: E → 90–100% control (FieldMarshal policy interval) (PDF) |
| Venturous 3ME EPA 524-591-55467; same active ingredients on 1 other branded product | acetochlor | 15 | Ks Weed Guide 2026, ks alfalfa post to alfalfa pre to weeds: G → 80–90% control (FieldMarshal policy interval) (PDF); Mi Weed Guide 2026 Forage, mi forage seedling legumes: E → 90–100% control (FieldMarshal policy interval) (PDF); ND Weed Guide 2026: E → 90–99% control (PDF) |
| Poast EPA 7969-58 | sethoxydim | 1 | ND Weed Guide 2026: E → 90–99% 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
- Ks Weed Guide 2026 (PDF)
- Mi Weed Guide 2026 Forage (PDF)
- ND Weed Guide 2026 (PDF)
- WinField Crop Protection 2026 (PDF)
Data from current labels and weed guides. Last source update: 2026-09-30.