From labels and weed guides
Best herbicides for downy brome in grass seed
For downy brome in grass seed, the weed guides list 1 active-ingredient group with every rating at least 80% control, after checking that the products are labeled for grass seed.
Downy Brome control in grass seed
Every listed product is labeled for grass seed. 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, 1 active-ingredient group is rated at least 80% control for downy brome in grass seed.
| Example product | Active ingredients | MOA group | Ratings checked |
|---|---|---|---|
| Fierce EZ EPA 59639-237 | flumioxazin and pyroxasulfone | 14, 15 | ND Weed Guide 2026: G-E → 80–99% 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
Data from current labels and weed guides. Last source update: 2026-09-30.