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IMPACT Herbicide

Broadleaf Weed Control
IMPACT herbicide provides excellent postemergence control of major annual broadleaf weeds in corn, such as velvetleaf, cocklebur, pigweed, waterhemp, lambsquarters and ragweed; including those tough-to-control weeds or biotypes resistant to glyphosate, triazine or ALS herbicides.

Application Guidelines

Broadleaf Weeds Controlled

  • Palmer Amaranth
  • Powell Amaranth
  • Burcucumber
  • Carpetweed
  • Common Chickweed
  • Common Cocklebur
  • Common Lambsquarters
  • Common Mallow
  • Dandelion*
  • Hairy Galinsoga
  • Henbit
  • Horseweed (Marestail)
  • Jimsonweed
  • Kochia
  • Venice Mallow*
  • Morningglory sp.*
  • Mustard sp.
  • Nightshade - Black, E. Black, Hairy
  • Pigweeds - Redroot, Smooth, Tumble and Prostrate
  • Pusley, Florida
  • Prickly Lettuce
  • Common Ragweed
  • Giant Ragweed
  • Shepardspurse
  • Prickly Sida
  • Pennsylvania Smartweed
  • Ladysthumb
  • Sunflower - Wild and Volunteer
  • Canada Thistle*
  • Russian Thistle
  • Velvetleaf
  • Waterhemp - Common and Tall
         *partial control
  • IMPACT provides GrassAssist™ - The Grass Control Bonus
    The unique chemistry of TOPRAMEZONE not only controls the broadleaf weeds, it provides extra power that cleans up susceptible problem grasses.

    Grass Weeds Controlled


  • Barnyardgrass
  • Large Crabgrass
  • Smooth Crabgrass
  • Giant Foxtail
  • Goosegrass
  • Green Foxtail
  • Yellow Foxtail*
  • Seedling Johnsongrass*
  • Shattercane*
  • Fall Panicum*
  • Wild-Proso Millet
  • Broadleaf Signalgrass*
  • Woolly Cupgrass*
         *partial control
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