From labels and weed guides
Group 4 herbicides for waterhemp in field corn
There are 6 Group 4 active-ingredient groups rated good or excellent for waterhemp in field corn, with products labeled for field corn.
Group 4 mode of action (MOA) options
Group 4 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, 6 active-ingredient groups are rated good or excellent for waterhemp in field corn.
| Example product | Active ingredients | MOA group | Ratings checked |
|---|---|---|---|
| 2,4-D Amine 4 EPA 1381-103; same active ingredients on 77 other branded products | 2,4-d | 4 | WinField Crop Protection 2026, corn post: G (PDF) |
| Distinct EPA 7969-150; same active ingredients on 2 other branded products | dicamba and diflufenzopyr | 4, 19 | Ia Weed Guide 2025, ia corn post: G-E (PDF); WinField Crop Protection 2026, corn post: E (PDF) |
| Daikon EPA 91234-217; same active ingredients on 1 other branded product | dicamba and halosulfuron-methyl | 2, 4 | WinField Crop Protection 2026, corn post: E (PDF) |
| DiFlexx DUO EPA 264-1184 | dicamba and tembotrione | 4, 27 | WinField Crop Protection 2026, corn post: 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) |
| Kyro EPA 62719-766 | acetochlor, clopyralid, and topramezone | 4, 15, 27 | WinField Crop Protection 2026, corn post: E (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.