From labels and weed guides
Best herbicides for johnsongrass in cotton
For johnsongrass in cotton, the weed guides list 3 active-ingredient groups with every rating at least 80% control, after checking that the products are labeled for cotton.
Johnsongrass 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 1 weed guide, 3 active-ingredient groups are rated at least 80% control for johnsongrass 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: E → 90–100% control (FieldMarshal policy interval) (PDF) |
| Arrow 2EC EPA 66222-60; same active ingredients on 36 other branded products | clethodim | 1 | Ks Weed Guide 2026, ks cotton post: G-E → 80–100% control (FieldMarshal policy interval) (PDF) |
| Assure II EPA 352-541; same active ingredients on 3 other branded products | quizalofop-p-ethyl | 1 | Ks Weed Guide 2026, ks cotton post: G-E → 80–100% 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.