From labels and weed guides
Group 4 herbicides for redroot pigweed in oats
There are 5 Group 4 active-ingredient groups rated good or excellent for redroot pigweed in oats, with products labeled for oats.
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 oats. 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, 5 active-ingredient groups are rated good or excellent for redroot pigweed in oats.
| Example product | Active ingredients | MOA group | Ratings checked |
|---|---|---|---|
| Carnivore EPA 1381-249; same active ingredients on 2 other branded products | bromoxynil, fluroxypyr 1-methylheptyl ester, and mcpa | 4, 6 | WinField Crop Protection 2026, small grains: G (PDF) |
| Imitator + 2,4-D EPA 19713-635; same active ingredients on 2 other branded products | 2,4-d and glyphosate | 4, 9 | ND Weed Guide 2026: E (PDF) |
| Orion EPA 100-1307 | florasulam and mcpa | 2, 4 | ND Weed Guide 2026: E (PDF) |
| Starane Flex EPA 62719-604 | florasulam and fluroxypyr 1-methylheptyl ester | 2, 4 | ND Weed Guide 2026: G-E (PDF) |
| Supremacy EPA 66330-406 | fluroxypyr 1-methylheptyl ester, thifensulfuron, and tribenuron-methyl | 2, 4 | 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.
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.