From labels and weed guides
Group 1 herbicides for common barnyardgrass in field pea
There are 3 Group 1 active-ingredient groups rated good or excellent for common barnyardgrass in field pea, with products labeled for field pea.
Group 1 mode of action (MOA) options
Group 1 is a herbicide mode of action (MOA) group. Treat it as one resistance-management check, not as the whole program.
Every listed product is labeled for field pea. 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, 3 active-ingredient groups are rated good or excellent for common barnyardgrass in field pea.
| Example product | Active ingredients | MOA group | Ratings checked |
|---|---|---|---|
| Arrow 2EC EPA 66222-60; same active ingredients on 36 other branded products | clethodim | 1 | ND Weed Guide 2026: E (PDF); WinField Crop Protection 2026, pea: E (PDF) |
| Assure II EPA 352-541; same active ingredients on 3 other branded products | quizalofop-p-ethyl | 1 | ND Weed Guide 2026: E (PDF) |
| Poast EPA 7969-58; same active ingredients on 1 other branded product | sethoxydim | 1 | ND Weed Guide 2026: E (PDF); WinField Crop Protection 2026, pea: 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.
Build the full program
Check crop, timing, state, resistance, and rotation in one plan before you make a recommendation.
Sources
Data from current labels and weed guides. Last source update: 2026-07-14.