From labels and weed guides
Best herbicides for russian thistle in seed corn
For russian thistle in seed corn, the weed guides list 20 active-ingredient groups rated good or excellent, after checking that the products are labeled for seed corn.
Russian Thistle control in seed corn
Every listed product is labeled for seed 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, 20 active-ingredient groups are rated good or excellent for russian thistle in seed corn, showing the top 12 below.
| Example product | Active ingredients | MOA group | Ratings checked |
|---|---|---|---|
| Crop Protect Direct Metri 75DF EPA 100485-1-101458; same active ingredients on 25 other branded products | metribuzin | 5 | ND Weed Guide 2026: G-E (PDF) |
| Bonedry EPA 82557-1; same active ingredients on 13 other branded products | paraquat | 22 | ND Weed Guide 2026: E (PDF) |
| Comply EPA 100-1414-55467; same active ingredients on 7 other branded products | atrazine, mesotrione, and metolachlor | 5, 15, 27 | ND Weed Guide 2026: E (PDF); ND Weed Guide 2026: G-E (PDF) |
| Basagran EPA 66330-413; same active ingredients on 5 other branded products | bentazon | 6 | ND Weed Guide 2026: G (PDF) |
| Aquesta 4 F EPA 91234-32; same active ingredients on 3 other branded products | sulfentrazone | 14 | ND Weed Guide 2026: G-E (PDF) |
| BROX 2EC EPA 42750-48; same active ingredients on 3 other branded products | bromoxynil | 6 | ND Weed Guide 2026: E (PDF) |
| Corsican EPA 7969-279-55467; same active ingredients on 2 other branded products | dimethenamid-p and saflufenacil | 14, 15 | ND Weed Guide 2026: E (PDF) |
| Distinct EPA 7969-150; same active ingredients on 2 other branded products | dicamba and diflufenzopyr | 4, 19 | ND Weed Guide 2026: E (PDF) |
| Balance Flexx EPA 264-1067; same active ingredients on 1 other branded product | isoxaflutole | 27 | ND Weed Guide 2026: G (PDF) |
| Acuron EPA 100-1466 | atrazine, bicyclopyrone, mesotrione, and metolachlor | 5, 15, 27 | ND Weed Guide 2026: E (PDF) |
| Acuron Flexi EPA 100-1568 | bicyclopyrone, mesotrione, and metolachlor | 15, 27 | ND Weed Guide 2026: E (PDF) |
| Atrazine 4L EPA 34704-69 | atrazine | 5 | 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.
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Sources
Data from current labels and weed guides. Last source update: 2026-07-14.