From labels and weed guides
Best herbicides for horseweed in fallow
For horseweed in fallow, the weed guides list 16 active-ingredient groups rated good or excellent, after checking that the products are labeled for fallow.
Horseweed control in fallow
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 2 weed guides, 16 active-ingredient groups are rated good or excellent for horseweed in fallow, showing the top 12 below.
| Example product | Active ingredients | MOA group | Ratings checked |
|---|---|---|---|
| AAtrex 4L EPA 100-497; same active ingredients on 32 other branded products | atrazine | 5 | ND Weed Guide 2026: E (PDF) |
| Affinity BroadSpec EPA 279-9601; same active ingredients on 26 other branded products | thifensulfuron and tribenuron-methyl | 2 | WinField Crop Protection 2026, fallow: G (PDF) |
| Bite EPA 83529-74; same active ingredients on 9 other branded products | clopyralid | 4 | ND Weed Guide 2026: G-E (PDF) |
| Comply EPA 100-1414-55467; same active ingredients on 4 other branded products | atrazine, mesotrione, and metolachlor | 5, 15, 27 | ND Weed Guide 2026: E (PDF); ND Weed Guide 2026: G-E (PDF) |
| Enlist Duo EPA 62719-649; same active ingredients on 3 other branded products | 2,4-d and glyphosate | 4, 9 | ND Weed Guide 2026: G-Ea (PDF) |
| Corsican EPA 7969-279-55467; same active ingredients on 2 other branded products | dimethenamid-p and saflufenacil | 14, 15 | ND Weed Guide 2026: G-E (PDF) |
| Commando EPA 42750-92; same active ingredients on 1 other branded product | 2,4-d and clopyralid | 4 | ND Weed Guide 2026: G (PDF) |
| Callisto Xtra EPA 100-1359 | atrazine and mesotrione | 5, 27 | ND Weed Guide 2026: E (PDF) |
| Curtail M EPA 62719-86 | clopyralid and mcpa | 4 | ND Weed Guide 2026: G (PDF) |
| Distinct EPA 7969-150 | dicamba and diflufenzopyr | 4, 19 | ND Weed Guide 2026: G-E (PDF) |
| Huskie EPA 264-1023 | bromoxynil and pyrasulfotole | 6, 27 | ND Weed Guide 2026: G-E (PDF) |
| Huskie FX EPA 264-1208 | bromoxynil, fluroxypyr 1-methylheptyl ester, and pyrasulfotole | 4, 6, 27 | ND Weed Guide 2026: G-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.
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Sources
Data from current labels and weed guides. Last source update: 2026-07-14.