From labels and weed guides
Group 27 herbicides for common barnyardgrass in field corn
There are 16 Group 27 active-ingredient groups rated good or excellent for common barnyardgrass in field corn, with products labeled for field corn.
Group 27 mode of action (MOA) options
Group 27 is a herbicide mode of action (MOA) group. Treat it as one resistance-management check, not as the whole program.
Every listed product is labeled for field corn. 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 2 weed guides, 16 active-ingredient groups are rated good or excellent for common barnyardgrass in field corn, showing the top 12 below.
| Example product | Active ingredients | MOA group | Ratings checked |
|---|---|---|---|
| Double Header EPA 34704-1099; same active ingredients on 2 other branded products | acetochlor and mesotrione | 15, 27 | Ms Weed Guide 2025, ms corn post: G (PDF) |
| Equip EPA 83100-57-83979; same active ingredients on 2 other branded products | mesotrione and rimsulfuron | 2, 27 | Ms Weed Guide 2025, ms corn post: G (PDF); ND Weed Guide 2026: G-E (PDF) |
| Balance Flexx EPA 264-1067; same active ingredients on 1 other branded product | isoxaflutole | 27 | ND Weed Guide 2026: E (PDF) |
| Acuron EPA 100-1466 | atrazine, bicyclopyrone, mesotrione, and metolachlor | 5, 15, 27 | Ms Weed Guide 2025, ms corn pre: E (PDF); Ms Weed Guide 2025, ms corn post: G (PDF); ND Weed Guide 2026: E (PDF) |
| Acuron Flexi EPA 100-1568 | bicyclopyrone, mesotrione, and metolachlor | 15, 27 | ND Weed Guide 2026: E (PDF) |
| Capreno EPA 264-1063 | tembotrione and thiencarbazone-methyl | 2, 27 | Ms Weed Guide 2025, ms corn post: G (PDF) |
| Corvus EPA 264-1066 | isoxaflutole and thiencarbazone-methyl | 2, 27 | ND Weed Guide 2026: E (PDF) |
| DiFlexx DUO EPA 264-1184 | dicamba and tembotrione | 4, 27 | ND Weed Guide 2026: E (PDF) |
| Halex GT EPA 100-1282 | glyphosate, mesotrione, and metolachlor | 9, 15, 27 | Ms Weed Guide 2025, ms corn post: E (PDF); ND Weed Guide 2026: E (PDF) |
| Impact CORE EPA 5481-648 | acetochlor and topramezone | 15, 27 | Ms Weed Guide 2025, ms corn post: G (PDF) |
| IMPACTZ EPA 5481-612 | atrazine and topramezone | 5, 27 | ND Weed Guide 2026: E (PDF) |
| LAUDIS EPA 264-860 | tembotrione | 27 | Ms Weed Guide 2025, ms corn post: G (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.