From labels and weed guides
Best herbicides for swamp smartweed in field corn
For swamp smartweed in field corn, the weed guides list 2 active-ingredient groups with every rating at least 80% control, after checking that the products are labeled for field corn.
Swamp Smartweed control in field corn
Every listed product is labeled for field corn. 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, 2 active-ingredient groups are rated at least 80% control for swamp smartweed in field corn.
| 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 | WinField Crop Protection 2026, corn post: G → 81–90% control (PDF) |
| Kyro EPA 62719-766 | acetochlor, clopyralid, and topramezone | 4, 15, 27 | WinField Crop Protection 2026, corn post: G → 81–90% 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.