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 rated good or excellent, 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 stays at good or excellent for the active-ingredient group. If a guide gives a range, the weaker end of the range has to be good or excellent.
Based on 2 weed guides, 2 active-ingredient groups are rated good or excellent 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 | ND Weed Guide 2026: G-E (PDF) |
| Sequence EPA 100-1185 | glyphosate and metolachlor | 9, 15 | WinField Crop Protection 2026, soybean post: G (PDF) |
Rating legend: E=excellent, G=good, F=fair, P=poor, N=no control. 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.
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Sources
Data from current labels and weed guides. Last source update: 2026-07-14.