From labels and weed guides
Best herbicides for witchgrass in sorghum
For witchgrass in sorghum, the weed guides list 2 active-ingredient groups with every rating at least 80% control, after checking that the products are labeled for sorghum.
Witchgrass control in sorghum
Every listed product is labeled for sorghum. 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, 2 active-ingredient groups are rated at least 80% control for witchgrass in sorghum.
| Example product | Active ingredients | MOA group | Ratings checked |
|---|---|---|---|
| Bicep II Magnum EPA 100-817; same active ingredients on 8 other branded products | atrazine and metolachlor | 5, 15 | Ks Weed Guide 2026, ks sorghum pre: G-E → 80–100% control (FieldMarshal policy interval) (PDF) |
| Corsican EPA 7969-279-55467; same active ingredients on 2 other branded products | dimethenamid-p and saflufenacil | 14, 15 | Ks Weed Guide 2026, ks sorghum pre: 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.