From labels and weed guides
Best herbicides for giant ragweed in field corn
For giant ragweed in field corn, the weed guides list 29 active-ingredient groups with every rating at least 80% control, after checking that the products are labeled for field corn.
Giant Ragweed 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 4 weed guides, 29 active-ingredient groups are rated at least 80% control for giant ragweed in field corn, showing the top 12 below.
| Example product | Active ingredients | MOA group | Ratings checked |
|---|---|---|---|
| 78623 58% Technical Solution EPA 524-532; same active ingredients on 82 other branded products | glyphosate | 9 | Mi Weed Guide 2026 Corn, mi corn post trait glyphosate: G → 80–90% control (FieldMarshal policy interval) (PDF); WinField Crop Protection 2026, corn post: G/E → 81–100% control (PDF); WinField Crop Protection 2026, corn post: E → 91–100% control (PDF) |
| 2,4-D Amine 4 EPA 1381-103; same active ingredients on 77 other branded products | 2,4-d | 4 | Mi Weed Guide 2026 Corn, mi corn post: G → 80–90% control (FieldMarshal policy interval) (PDF); Mi Weed Guide 2026 Corn, mi corn post trait enlist: G → 80–90% control (FieldMarshal policy interval) (PDF); WinField Crop Protection 2026, corn post: G → 81–90% control (PDF) |
| Alligare Dicamba 4 EPA 81927-55; same active ingredients on 35 other branded products | dicamba | 4 | Mi Weed Guide 2026 Corn, mi corn post: E → 90–100% control (FieldMarshal policy interval) (PDF) |
| Actylis Glufosinate 280SL EPA 2749-637; same active ingredients on 31 other branded products | glufosinate | 10 | Mi Weed Guide 2026 Corn, mi corn post trait libertylink: G → 80–90% control (FieldMarshal policy interval) (PDF) |
| Actylis Metribuzin EPA 2749-660; same active ingredients on 31 other branded products | metribuzin | 5 | WinField Crop Protection 2026, corn post: G/E → 81–100% control (PDF) |
| Bicep II Magnum EPA 100-817; same active ingredients on 15 other branded products | atrazine and metolachlor | 5, 15 | Mi Weed Guide 2026 Corn, mi corn soil premix: G → 80–90% control (FieldMarshal policy interval) (PDF) |
| Bite EPA 83529-74; same active ingredients on 8 other branded products | clopyralid | 4 | Mi Weed Guide 2026 Corn, mi corn post: E → 90–100% control (FieldMarshal policy interval) (PDF); WinField Crop Protection 2026, corn post: E → 91–100% control (PDF) |
| Comet EPA 71368-87; same active ingredients on 8 other branded products | fluroxypyr 1-methylheptyl ester | 4 | WinField Crop Protection 2026, corn post: G/E → 81–100% control (PDF) |
| COLT AS EPA 34704-1019; same active ingredients on 5 other branded products | clopyralid and fluroxypyr 1-methylheptyl ester | 4 | WinField Crop Protection 2026, corn post: E → 91–100% control (PDF) |
| Broadleaf Blend EPA 5481-678; same active ingredients on 4 other branded products | clopyralid and flumetsulam | 2, 4 | Ia Weed Guide 2025, ia corn pre: G → 80–90% control (FieldMarshal policy interval) (PDF); Ia Weed Guide 2025, ia corn post: G-E → 80–100% control (FieldMarshal policy interval) (PDF); Mi Weed Guide 2026 Corn, mi corn post premix: E → 90–100% control (FieldMarshal policy interval) (PDF); Mi Weed Guide 2026 Corn, mi corn soil premix: G → 80–90% control (FieldMarshal policy interval) (PDF); WinField Crop Protection 2026, corn post: E → 91–100% control (PDF) |
| Enlist Duo EPA 62719-649; same active ingredients on 3 other branded products | 2,4-d and glyphosate | 4, 9 | Ky Weed Guide 2025, ky corn burndown: 9 → 80–90% control (FieldMarshal policy interval) (PDF); Mi Weed Guide 2026 Corn, mi corn post trait enlist: G → 80–90% control (FieldMarshal policy interval) (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 → 80–90% control (FieldMarshal policy interval) (PDF); Ky Weed Guide 2025, ky corn postemergence: 9 → 80–90% control (FieldMarshal policy interval) (PDF); Mi Weed Guide 2026 Corn, mi corn post premix: E → 90–100% control (FieldMarshal policy interval) (PDF); WinField Crop Protection 2026, corn post: E → 91–100% 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
- Ia Weed Guide 2025 (PDF)
- Ky Weed Guide 2025 (PDF)
- Mi Weed Guide 2026 Corn (PDF)
- WinField Crop Protection 2026 (PDF)
Data from current labels and weed guides. Last source update: 2026-09-30.