From labels and weed guides
Best herbicides for knotweed in sugar beet
For knotweed in sugar beet, the weed guides list 2 active-ingredient groups with every rating at least 80% control, after checking that the products are labeled for sugar beet.
Knotweed control in sugar beet
Every listed product is labeled for sugar beet. 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 knotweed in sugar beet.
| Example product | Active ingredients | MOA group | Ratings checked |
|---|---|---|---|
| 78623 58% Technical Solution EPA 524-532; same active ingredients on 80 other branded products | glyphosate | 9 | WinField Crop Protection 2026, sugarbeet: E → 91–100% control (PDF) |
| Bite EPA 83529-74; same active ingredients on 8 other branded products | clopyralid | 4 | WinField Crop Protection 2026, sugarbeet: G → 81–90% 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.