Warrant Now Registered For Use in Alfalfa in Wisconsin

Mark Renz Associate Professor and Extension Specialist, University of Wisconsin

Warrant is an encapsulated formulation of acetochlor, often used for pre-emergent weed control in soybeans has just received registration for use in establishing and established alfalfa in Wisconsin. For details on the use please visit the supplemental label (click here). Below is a summary of the use pattern and restrictions.

Seedling alfalfa:

  • Apply 1.25 to 2 quarts per acre following alfalfa emergence to the 4th-trifoliate stage. If fall planted you can also apply the following spring after green-up.
  • A sequential application between 1.25 to 2 quarts per acre may be made after the first or second cutting but no later than 7 days after the alfalfa is cut.
  • Wait a minimum of 20 days after application before cutting for forage or hay, or before open grazing of forage by livestock.

Established Alfalfa Stands (Non-Seeding Year):

  • Apply 1.25 to 2 quarts per acre after spring green-up and between cuttings but no later than 7 days after alfalfa is cut.
  • Remove any previously cut forage or hay from the field before making applications.
  • Wait a minimum of 20 days after application before cutting for forage or hay, or before open grazing of forage by livestock.

Restrictions:

  • Do no use this product on alfalfa grown for seed production.
  • Remove domestic livestock from alfalfa stands before making applications of this product.
  • Allow a minimum of 20 days between an application and subsequent cutting for forage or hay, or before open grazing of forage by livestock.
  • Do not exceed a maximum of 2 quarts (1.5 lbs a.i.) per acre of this product as a single application.
  • Do not exceed a total of 3 applications of this product per alfalfa growing season.
  • Do not exceed a combined total of 4 quarts (3 lbs a.i.) per acre per year in newly established stands (seeding year) or in established alfalfa stands (nonseeding year), when making multiple applications of this product or other acetochlor containing products.

To read the entire supplemental labeling document for use of Warrant Herbicide, click here.

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