From labels and weed guides
Best herbicides for mayweed in oats
For mayweed in oats, the weed guides list 9 active-ingredient groups with every rating at least 80% control, after checking that the products are labeled for oats.
Mayweed control in oats
Every listed product is labeled for oats. 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 2 weed guides, 9 active-ingredient groups are rated at least 80% control for mayweed in oats.
| Example product | Active ingredients | MOA group | Ratings checked |
|---|---|---|---|
| ABUNDIT Edge EPA 352-922; same active ingredients on 79 other branded products | glyphosate | 9 | Mi Weed Guide 2026 Small Grain, mi small grain burndown: E → 90–100% control (FieldMarshal policy interval) (PDF) |
| Affinity BroadSpec EPA 279-9601; same active ingredients on 20 other branded products | thifensulfuron and tribenuron-methyl | 2 | Mi Weed Guide 2026 Small Grain, mi small grain post: E → 90–100% control (FieldMarshal policy interval) (PDF); WinField Crop Protection 2026, small grains: E → 91–100% control (PDF) |
| Bison EPA 71368-28-1381; same active ingredients on 11 other branded products | bromoxynil and mcpa | 4, 6 | WinField Crop Protection 2026, small grains: G → 81–90% control (PDF) |
| Bite EPA 83529-74; same active ingredients on 8 other branded products | clopyralid | 4 | Mi Weed Guide 2026 Small Grain, mi small grain post: G → 80–90% control (FieldMarshal policy interval) (PDF) |
| COLT AS EPA 34704-1019; same active ingredients on 5 other branded products | clopyralid and fluroxypyr 1-methylheptyl ester | 4 | Mi Weed Guide 2026 Small Grain, mi small grain post: G → 80–90% control (FieldMarshal policy interval) (PDF) |
| Express EPA 279-9594; same active ingredients on 4 other branded products | tribenuron-methyl | 2 | Mi Weed Guide 2026 Small Grain, mi small grain post: E → 90–100% control (FieldMarshal policy interval) (PDF) |
| Harmony GT XP EPA 279-9577; same active ingredients on 3 other branded products | thifensulfuron | 2 | Mi Weed Guide 2026 Small Grain, mi small grain post: E → 90–100% control (FieldMarshal policy interval) (PDF) |
| GLEAN XP EPA 279-9600; same active ingredients on 1 other branded product | chlorsulfuron | 2 | WinField Crop Protection 2026, small grains: G → 81–90% control (PDF) |
| Curtail M EPA 62719-86 | clopyralid and mcpa | 4 | WinField Crop Protection 2026, small grains: E → 91–100% 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.