From labels and weed guides
Best herbicides for horseweed in seed corn
For horseweed in seed corn, the weed guides list 19 active-ingredient groups rated good or excellent, after checking that the products are labeled for seed corn.
Horseweed control in seed corn
Every listed product is labeled for seed 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, 19 active-ingredient groups are rated good or excellent for horseweed in seed corn, showing the top 12 below.
| Example product | Active ingredients | MOA group | Ratings checked |
|---|---|---|---|
| Comply EPA 100-1414-55467; same active ingredients on 7 other branded products | atrazine, mesotrione, and metolachlor | 5, 15, 27 | ND Weed Guide 2026: E (PDF); ND Weed Guide 2026: G-E (PDF) |
| Staunch II EPA 62719-679-55467; same active ingredients on 4 other branded products | acetochlor, clopyralid, and flumetsulam | 2, 4, 15 | ND Weed Guide 2026: G-E (PDF) |
| Orador EPA 91234-324; same active ingredients on 3 other branded products | acetochlor, clopyralid, and mesotrione | 4, 15, 27 | ND Weed Guide 2026: G-E (PDF) |
| Corsican EPA 7969-279-55467; same active ingredients on 2 other branded products | dimethenamid-p and saflufenacil | 14, 15 | ND Weed Guide 2026: G-E (PDF) |
| Distinct EPA 7969-150; same active ingredients on 2 other branded products | dicamba and diflufenzopyr | 4, 19 | ND Weed Guide 2026: G-E (PDF) |
| Hornet WDG EPA 62719-315; same active ingredients on 2 other branded products | clopyralid and flumetsulam | 2, 4 | ND Weed Guide 2026: E (PDF) |
| Balance Flexx EPA 264-1067; same active ingredients on 1 other branded product | isoxaflutole | 27 | ND Weed Guide 2026: G-E (PDF) |
| Acuron EPA 100-1466 | atrazine, bicyclopyrone, mesotrione, and metolachlor | 5, 15, 27 | ND Weed Guide 2026: G-E (PDF) |
| Acuron Flexi EPA 100-1568 | bicyclopyrone, mesotrione, and metolachlor | 15, 27 | ND Weed Guide 2026: G-E (PDF) |
| Atrazine 4L EPA 34704-69 | atrazine | 5 | ND Weed Guide 2026: E (PDF) |
| Callisto Xtra EPA 100-1359 | atrazine and mesotrione | 5, 27 | ND Weed Guide 2026: E (PDF) |
| Corvus EPA 264-1066 | isoxaflutole and thiencarbazone-methyl | 2, 27 | ND Weed Guide 2026: 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.
Build the full program
Check crop, timing, state, resistance, and rotation in one plan before you make a recommendation.
Sources
Data from current labels and weed guides. Last source update: 2026-07-14.