From labels and weed guides
Best herbicides for horseweed in soybeans
For horseweed in soybeans, the weed guides list 3 active-ingredient groups with every rating at least 80% control, after checking that the products are labeled for soybeans.
Horseweed control in soybeans
Every listed product is labeled for soybeans. 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, 3 active-ingredient groups are rated at least 80% control for horseweed in soybeans.
| Example product | Active ingredients | MOA group | Ratings checked |
|---|---|---|---|
| Fever Prime EPA 89167-87-89391; same active ingredients on 2 other branded products | glufosinate and metolachlor | 10, 15 | Ks Weed Guide 2026, ks soybean post: G-E → 80–100% control (FieldMarshal policy interval) (PDF); ND Weed Guide 2026: G-E → 80–99% control (PDF) |
| Autumn Super 51 WDG EPA 264-1134 | iodosulfuron-methyl and thiencarbazone-methyl | 2 | WinField Crop Protection 2026, soybean burndown: E → 91–100% control (PDF) |
| Enlist Duo EPA 62719-649 | 2,4-d and glyphosate | 4, 9 | Mi Weed Guide 2026 Soybeans, mi soybean burndown p2 enlist: E → 90–100% control (FieldMarshal policy interval) (PDF); Mi Weed Guide 2026 Soybeans, mi soybean post trait enlist: G → 80–90% control (FieldMarshal policy interval) (PDF); ND Weed Guide 2026: G-Ea → 80–99% control (PDF); WinField Crop Protection 2026, soybean burndown: 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
- Ks Weed Guide 2026 (PDF)
- Mi Weed Guide 2026 Soybeans (PDF)
- ND Weed Guide 2026 (PDF)
- WinField Crop Protection 2026 (PDF)
Data from current labels and weed guides. Last source update: 2026-09-30.