From labels and weed guides
Group 4 herbicides for annual smartweed in fallow
There are 8 Group 4 active-ingredient groups rated good or excellent for annual smartweed in fallow, with products labeled for fallow.
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 fallow. 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 annual smartweed in fallow.
| Example product | Active ingredients | MOA group | Ratings checked |
|---|---|---|---|
| Alligare Dicamba 4 EPA 81927-55; same active ingredients on 36 other branded products | dicamba | 4 | ND Weed Guide 2026: E (PDF) |
| Bite EPA 83529-74; same active ingredients on 9 other branded products | clopyralid | 4 | ND Weed Guide 2026: G-E (PDF) |
| Bromac EPA 34704-886; same active ingredients on 1 other branded product | bromoxynil and mcpa | 4, 6 | ND Weed Guide 2026: G (PDF) |
| Commando EPA 42750-92; same active ingredients on 1 other branded product | 2,4-d and clopyralid | 4 | ND Weed Guide 2026: E (PDF) |
| Curtail M EPA 62719-86 | clopyralid and mcpa | 4 | ND Weed Guide 2026: E (PDF) |
| Distinct EPA 7969-150 | dicamba and diflufenzopyr | 4, 19 | ND Weed Guide 2026: E (PDF) |
| Huskie FX EPA 264-1208 | bromoxynil, fluroxypyr 1-methylheptyl ester, and pyrasulfotole | 4, 6, 27 | ND Weed Guide 2026: G-E (PDF) |
| Truslate EPA 71368-86 | clopyralid and fluroxypyr 1-methylheptyl ester | 4 | ND Weed Guide 2026: 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.