From labels and weed guides
Best herbicides for purple ammannia (red stem) in rice
For purple ammannia (red stem) in rice, the weed guides list 8 active-ingredient groups rated good or excellent, after checking that the products are labeled for rice.
Purple Ammannia (red Stem) control in rice
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 1 weed guide, 8 active-ingredient groups are rated good or excellent for purple ammannia (red stem) in rice.
| Example product | Active ingredients | MOA group | Ratings checked |
|---|---|---|---|
| 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) |
| Gambit EPA 81880-27-10163 | halosulfuron-methyl and prosulfuron | 2 | Ms Weed Guide 2025, ms rice post before flood: G (PDF) |
| League EPA 59639-166 | imazosulfuron | 2 | Ms Weed Guide 2025, ms rice post before flood: G (PDF) |
| Permit Plus EPA 81880-26-10163 | halosulfuron-methyl and thifensulfuron | 2 | Ms Weed Guide 2025, ms rice post before flood: E (PDF) |
| Sharpen EPA 7969-278 | saflufenacil | 14 | Ms Weed Guide 2025, ms rice post before flood: G (PDF) |
| Storm EPA 70506-59 | acifluorfen and bentazon | 6, 14 | Ms Weed Guide 2025, ms rice post before flood: E (PDF) |
| STRADA EPA 71711-44 | orthosulfamuron | 2 | Ms Weed Guide 2025, ms rice post before flood: G (PDF) |
| STRADA PRO EPA 71711-47 | halosulfuron-methyl and orthosulfamuron | 2 | Ms Weed Guide 2025, ms rice post before flood: 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.