Wisconsin regulations restrict atrazine use beyond federal product label restrictions. It is important to remember that many products contain atrazine, even if it is not part of their name. These restrictions apply to all products that have atrazine as an ingredient.
Restrictions on use
- Apply only between April 1 and July 31
- All handlers and applicators must be certified
- Use only on agricultural row crops and in forestry
- Record on the day of application for each field treated and keep records for 3 years:
- Applicator's name
- Farmer's name and address if different from applicator
- Field location
- Date and time of application
- Brand name of product
- Manufacturer of EPA registration number of product
- Application rate
- Size of area treated
- Location where the product was loaded into the sprayer
Application Rate Restrictions
Application rates depend on soil texture and prior use of atrazine on the field:
| Coarse (at least 25 percent sand, loamy sand or sandy loam) | ¾ pound active ingredient atrazine per acre per year | ¾ pound active ingredient atrazine per acre per year |
| Medium/fine soils (loam, silt, silt loam, sandy clay loam, silty clay loam, sandy clay, silty clay, clay, peat, muck | 1 pound active ingredient atrazine per acre per year | 1½ pound active ingredient atrazine per acre per year |