From labels and weed guides
Best herbicides for quackgrass in grass seed
For quackgrass in grass seed, the weed guides list 2 active-ingredient groups rated good or excellent, after checking that the products are labeled for grass seed.
Quackgrass control in grass seed
Every listed product is labeled for grass seed. 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 1 weed guide, 2 active-ingredient groups are rated good or excellent for quackgrass in grass seed.
| Example product | Active ingredients | MOA group | Ratings checked |
|---|---|---|---|
| Enfilade DX EPA 91234-308; same active ingredients on 3 other branded products | fluazifop-p-butyl | 1 | ND Weed Guide 2026: G (PDF) |
| Se-Cure EC EPA 83529-15 | quizalofop-p-ethyl | 1 | ND Weed Guide 2026: G (PDF); ND Weed Guide 2026: 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.