From labels and weed guides
Best herbicides for russian thistle in sorghum-sudangrass
For russian thistle in sorghum-sudangrass, the weed guides list 2 active-ingredient groups with every rating at least 80% control, after checking that the products are labeled for sorghum-sudangrass.
Russian Thistle control in sorghum-sudangrass
Every listed product is labeled for sorghum-sudangrass. 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 russian thistle in sorghum-sudangrass.
| Example product | Active ingredients | MOA group | Ratings checked |
|---|---|---|---|
| AAtrex 4L EPA 100-497; same active ingredients on 25 other branded products | atrazine | 5 | ND Weed Guide 2026: E → 90–99% control (PDF) |
| 2,4-D Amine 4 EPA 1381-103; same active ingredients on 5 other branded products | 2,4-d | 4 | ND Weed Guide 2026: G → 80–90% 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
Data from current labels and weed guides. Last source update: 2026-09-30.