From labels and weed guides
Best herbicides for horse weed (marestail) in field corn
For horse weed (marestail) in field corn, the weed guides list 7 active-ingredient groups rated good or excellent, after checking that the products are labeled for field corn.
Horse Weed (marestail) control in field corn
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 1 weed guide, 7 active-ingredient groups are rated good or excellent for horse weed (marestail) in field corn.
| Example product | Active ingredients | MOA group | Ratings checked |
|---|---|---|---|
| Broclean EPA 34704-891; same active ingredients on 5 other branded products | bromoxynil | 6 | WinField Crop Protection 2026, corn post: G (PDF) |
| Accolade EPA 62719-277-279; same active ingredients on 4 other branded products | flumetsulam | 2 | WinField Crop Protection 2026, corn post: G (PDF) |
| Broadleaf Blend EPA 5481-678; same active ingredients on 4 other branded products | clopyralid and flumetsulam | 2, 4 | WinField Crop Protection 2026, corn post: G (PDF) |
| Equip EPA 83100-57-83979; same active ingredients on 2 other branded products | mesotrione and rimsulfuron | 2, 27 | WinField Crop Protection 2026, corn post: G (PDF) |
| Peak EPA 100-763; same active ingredients on 1 other branded product | prosulfuron | 2 | WinField Crop Protection 2026, corn post: G/E (PDF) |
| Acuron EPA 100-1466 | atrazine, bicyclopyrone, mesotrione, and metolachlor | 5, 15, 27 | WinField Crop Protection 2026, corn post: G/E (PDF) |
| Kochiavore EPA 1381-258 | 2,4-d, bromoxynil, and fluroxypyr 1-methylheptyl ester | 4, 6 | WinField Crop Protection 2026, 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.