From labels and weed guides
Best herbicides for smartweed in field corn
For smartweed in field corn, the weed guides list 8 active-ingredient groups rated good or excellent, after checking that the products are labeled for field corn.
Smartweed control in field corn
Every listed product is labeled for field corn. 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 smartweed in field corn.
| Example product | Active ingredients | MOA group | Ratings checked |
|---|---|---|---|
| AAtrex 4L EPA 100-497; same active ingredients on 31 other branded products | atrazine | 5 | Ia Weed Guide 2025, ia corn pre: E (PDF); Ia Weed Guide 2025, ia corn post: E (PDF) |
| Basagran EPA 66330-413; same active ingredients on 9 other branded products | bentazon | 6 | Ia Weed Guide 2025, ia corn post: E (PDF) |
| Accolade EPA 62719-277-279; same active ingredients on 4 other branded products | flumetsulam | 2 | Ia Weed Guide 2025, ia corn pre: G-E (PDF) |
| Broadleaf Blend EPA 5481-678; same active ingredients on 4 other branded products | clopyralid and flumetsulam | 2, 4 | Ia Weed Guide 2025, ia corn pre: G-E (PDF); Ia Weed Guide 2025, ia corn post: G-E (PDF) |
| Distinct EPA 7969-150; same active ingredients on 2 other branded products | dicamba and diflufenzopyr | 4, 19 | Ia Weed Guide 2025, ia corn post: E (PDF) |
| Balance Flexx EPA 264-1067; same active ingredients on 1 other branded product | isoxaflutole | 27 | Ia Weed Guide 2025, ia corn pre: G-E (PDF) |
| LAUDIS EPA 264-860 | tembotrione | 27 | Ia Weed Guide 2025, ia corn post: G (PDF) |
| Sharpen EPA 7969-278 | saflufenacil | 14 | Ia Weed Guide 2025, ia corn pre: 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.
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Sources
Data from current labels and weed guides. Last source update: 2026-07-14.