From labels and weed guides
Group 4 herbicides for broadleaf signalgrass in rice
There are 2 Group 4 active-ingredient groups rated good or excellent for broadleaf signalgrass in rice, with products labeled for rice.
Group 4 mode of action (MOA) options
Group 4 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 rice. 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 broadleaf signalgrass in rice.
| Example product | Active ingredients | MOA group | Ratings checked |
|---|---|---|---|
| Arose EPA 83529-75; same active ingredients on 8 other branded products | quinclorac | 4 | Ms Weed Guide 2025, ms rice pre: E (PDF); Ms Weed Guide 2025, ms rice post before flood: E (PDF); WinField Crop Protection 2026, rice: E (PDF) |
| Loyant EPA 62719-698; same active ingredients on 1 other branded product | florpyrauxifen-benzyl | 4 | Ms Weed Guide 2025, ms rice post before flood: E (PDF); WinField Crop Protection 2026, rice: 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.
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.