Bayer Crop Science's Define SC herbicide is now officially approved for use in corn. The product, based on oxyacetamide chemistry, provides residual control of annual grasses and small-seeded broadleaves. Define SC can be applied pre-plant incorporated up to 14 days before planting and early pre-plant up to 45 days before planting when used in a sequential program. It is available in bulk and stackable 220-gal. shuttles. Bayer has positioned the product as a tankmix partner with Balance Pro or as part of a sequential program with Liberty, Option or Equip herbicides.