From labels and weed guides
Best herbicides for smartweed in cotton
For smartweed in cotton, the weed guides list 6 active-ingredient groups with every rating at least 80% control, after checking that the products are labeled for cotton.
Smartweed control in cotton
Every listed product is labeled for cotton. 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 2 weed guides, 6 active-ingredient groups are rated at least 80% control for smartweed in cotton.
| Example product | Active ingredients | MOA group | Ratings checked |
|---|---|---|---|
| 78623 58% Technical Solution EPA 524-532; same active ingredients on 83 other branded products | glyphosate | 9 | Ks Weed Guide 2026, ks cotton post: G → 80–90% control (FieldMarshal policy interval) (PDF); Tn Weed Guide 2026, tn burndown cotton: 7 → 80–90% control (FieldMarshal policy interval) (PDF) |
| Alligare Dicamba 4 EPA 81927-55; same active ingredients on 34 other branded products | dicamba | 4 | Tn Weed Guide 2026, tn burndown cotton: 8 → 80–90% control (FieldMarshal policy interval) (PDF) |
| Actylis Glufosinate 280SL EPA 2749-637; same active ingredients on 31 other branded products | glufosinate | 10 | Tn Weed Guide 2026, tn burndown cotton: 7 → 80–90% control (FieldMarshal policy interval) (PDF) |
| Axill Solutions Flumi 51% WDG EPA 95055-14-93809; same active ingredients on 25 other branded products | flumioxazin | 14 | Ks Weed Guide 2026, ks cotton directed post: G-E → 80–100% control (FieldMarshal policy interval) (PDF) |
| AIM EC EPA 279-3241; same active ingredients on 12 other branded products | carfentrazone-ethyl | 14 | Ks Weed Guide 2026, ks cotton directed post: G-E → 80–100% control (FieldMarshal policy interval) (PDF) |
| Fever Prime EPA 89167-87-89391; same active ingredients on 2 other branded products | glufosinate and metolachlor | 10, 15 | Ks Weed Guide 2026, ks cotton post: G → 80–90% 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.