From labels and weed guides
Best herbicides for quackgrass in soybeans
For quackgrass in soybeans, the weed guides list 7 active-ingredient groups rated good or excellent, after checking that the products are labeled for soybeans.
Quackgrass 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, 7 active-ingredient groups are rated good or excellent for quackgrass in soybeans.
| Example product | Active ingredients | MOA group | Ratings checked |
|---|---|---|---|
| Arrow 2EC EPA 66222-60; same active ingredients on 37 other branded products | clethodim | 1 | ND Weed Guide 2026: G-E (PDF); WinField Crop Protection 2026, soybean post: G (PDF) |
| Basis Blend EPA 352-854; same active ingredients on 5 other branded products | rimsulfuron and thifensulfuron | 2 | ND Weed Guide 2026: G-E (PDF) |
| Agent GT EPA 33270-30; same active ingredients on 3 other branded products | fomesafen and glyphosate | 9, 14 | ND Weed Guide 2026: E (PDF); WinField Crop Protection 2026, soybean post: G/E (PDF) |
| Assure II EPA 352-541; same active ingredients on 3 other branded products | quizalofop-p-ethyl | 1 | ND Weed Guide 2026: G (PDF); ND Weed Guide 2026: E (PDF); WinField Crop Protection 2026, soybean post: G/E (PDF) |
| Enfilade DX EPA 91234-308; same active ingredients on 3 other branded products | fluazifop-p-butyl | 1 | ND Weed Guide 2026: G (PDF); WinField Crop Protection 2026, soybean post: G/E (PDF) |
| Enlist Duo EPA 62719-649 | 2,4-d and glyphosate | 4, 9 | ND Weed Guide 2026: E (PDF) |
| Sequence EPA 100-1185 | glyphosate and metolachlor | 9, 15 | WinField Crop Protection 2026, soybean post: E (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.