From labels and weed guides
Best herbicides for canada thistle in soybeans
For canada thistle in soybeans, the weed guides list 2 active-ingredient groups with every rating at least 80% control, after checking that the products are labeled for soybeans.
Canada Thistle control in soybeans
Every listed product is labeled for soybeans. 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 3 weed guides, 2 active-ingredient groups are rated at least 80% control for canada thistle in soybeans.
| Example product | Active ingredients | MOA group | Ratings checked |
|---|---|---|---|
| Enlist Duo EPA 62719-649 | 2,4-d and glyphosate | 4, 9 | Mi Weed Guide 2026 Soybeans, mi soybean post trait enlist: G → 80–90% control (FieldMarshal policy interval) (PDF); ND Weed Guide 2026: G-E → 80–99% control (PDF) |
| Sequence EPA 100-1185 | glyphosate and metolachlor | 9, 15 | Mi Weed Guide 2026 Soybeans, mi soybean post trait glyphosate: G → 80–90% control (FieldMarshal policy interval) (PDF); WinField Crop Protection 2026, soybean post: 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.