From labels and weed guides
Best herbicides for smartweed in sorghum
For smartweed in sorghum, the weed guides list 5 active-ingredient groups with every rating at least 80% control, after checking that the products are labeled for sorghum.
Smartweed 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, 5 active-ingredient groups are rated at least 80% control for smartweed in sorghum.
| Example product | Active ingredients | MOA group | Ratings checked |
|---|---|---|---|
| AAtrex 4L EPA 100-497; same active ingredients on 31 other branded products | atrazine | 5 | Tn Weed Guide 2026, tn grain sorghum: 8 → 80–90% control (FieldMarshal policy interval) (PDF) |
| AIM EC EPA 279-3241; same active ingredients on 12 other branded products | carfentrazone-ethyl | 14 | Tn Weed Guide 2026, tn grain sorghum: 7 → 80–90% control (FieldMarshal policy interval) (PDF) |
| Basagran EPA 66330-413; same active ingredients on 8 other branded products | bentazon | 6 | Tn Weed Guide 2026, tn grain sorghum: 7 → 80–90% control (FieldMarshal policy interval) (PDF) |
| Bicep II Magnum EPA 100-817; same active ingredients on 8 other branded products | atrazine and metolachlor | 5, 15 | Tn Weed Guide 2026, tn grain sorghum: 9 → 90–100% control (FieldMarshal policy interval) (PDF) |
| Huskie EPA 264-1023 | bromoxynil and pyrasulfotole | 6, 27 | Tn Weed Guide 2026, tn grain sorghum: 7 → 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.