From labels and weed guides
Best herbicides for quackgrass in field corn
For quackgrass in field corn, the weed guides list 8 active-ingredient groups with every rating at least 80% control, after checking that the products are labeled for field corn.
Quackgrass 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 3 weed guides, 8 active-ingredient groups are rated at least 80% control for quackgrass in field corn.
| Example product | Active ingredients | MOA group | Ratings checked |
|---|---|---|---|
| Arrow 2EC EPA 66222-60; same active ingredients on 25 other branded products | clethodim | 1 | ND Weed Guide 2026: G-E → 80–99% control (PDF) |
| Enlist Duo EPA 62719-649; same active ingredients on 3 other branded products | 2,4-d and glyphosate | 4, 9 | Mi Weed Guide 2026 Corn, mi corn post trait enlist: E → 90–100% control (FieldMarshal policy interval) (PDF); ND Weed Guide 2026: E → 90–99% control (PDF); WinField Crop Protection 2026, corn burndown: E → 91–100% control (PDF) |
| Accent EPA 352-560; same active ingredients on 2 other branded products | nicosulfuron | 2 | Mi Weed Guide 2026 Corn, mi corn post: G → 80–90% control (FieldMarshal policy interval) (PDF) |
| DuPont Steadfast EPA 352-608; same active ingredients on 2 other branded products | nicosulfuron and rimsulfuron | 2 | Mi Weed Guide 2026 Corn, mi corn post premix: G → 80–90% control (FieldMarshal policy interval) (PDF); ND Weed Guide 2026: G-E → 80–99% control (PDF); WinField Crop Protection 2026, corn post: E → 91–100% control (PDF) |
| Halex GT EPA 100-1282 | glyphosate, mesotrione, and metolachlor | 9, 15, 27 | Mi Weed Guide 2026 Corn, mi corn post trait glyphosate: E → 90–100% control (FieldMarshal policy interval) (PDF); ND Weed Guide 2026: E → 90–99% control (PDF); WinField Crop Protection 2026, corn post: E → 91–100% control (PDF) |
| Katagon EPA 71512-44-74530 | nicosulfuron and tolpyralate | 2, 27 | Mi Weed Guide 2026 Corn, mi corn post premix: G → 80–90% control (FieldMarshal policy interval) (PDF) |
| REVULIN Q EPA 352-900 | mesotrione and nicosulfuron | 2, 27 | Mi Weed Guide 2026 Corn, mi corn post premix: G → 80–90% control (FieldMarshal policy interval) (PDF); ND Weed Guide 2026: G-E → 80–99% control (PDF); WinField Crop Protection 2026, corn post: E → 91–100% control (PDF) |
| Sequence EPA 100-1185 | glyphosate and metolachlor | 9, 15 | Mi Weed Guide 2026 Corn, mi corn post trait glyphosate: E → 90–100% control (FieldMarshal policy interval) (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.