Oust Extra Weed Killer Herbicide

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Oust Extra Herbicide contains two primary ingredients: sulfometuron methyl and metsulfuron methyl. With these two ingredients, this herbicide controls more than 100 weed species in conifer plantations and other noncrop sites. Oust Extra penetrates the leaves when it's applied as a foliar spray and quickly inhibits the growth of susceptible weeds. When you apply it on dry fertilizer, the weeds absorb it through their roots and die soon after.


Where to Use Oust Extra Herbicide

Use Oust Extra on noncrop sites only, not on home lawns or walkways. It's labeled for use on industrial sites and conifer plantations for the control and prevention of invasive weed species. Although you cannot apply Oust Extra directly to water, you can treat bogs and other aquatic sites once the water has receded.


Target Weeds

When it's applied at labeled rates, Oust Extra targets more than 100 broadleaf weeds and grasses. It takes out many of the common and fast-spreading weeds such as poison hemlock, speedwell and ground ivy. It also kills giant ragweed, little mallow and yellow nutsedge. Other target weed species include:

  • Chickweed
  • Pokeweed
  • Barnyardgrass
  • Dandelion
  • Fescue
  • Rye
  • Whitetop
  • Wild garlic
  • Gumweed
  • Henbit

Oust Extra Features and Benefits

  • Kills and controls more than 100 different broadleaf weed and grass species
  • Contains two highly active ingredients for superior weed control
  • For use on industrial sites and labeled noncrop areas
  • Controls various woody plants and vines
  • Can be applied as a foliar spray or onto dry fertilizer

Restrictions and Tips for Use

  • Avoid using on lawns, driveways or similar areas.
  • Do not apply in irrigation ditches or canals.
  • Wait to treat stressed turfgrass to avoid further injury.
  • Apply up to 2 ounces per acre for treatment of Bermuda grass.

Oust Extra Kills Undesirable Weeds and Grasses

For control of broadleaf weeds, grasses, hardwoods and vines, Oust Extra herbicide delivers outstanding results thanks to its specialized formula. Containing two active ingredients, it penetrates the weeds and inhibits their growth, wiping out entire infestations after the first application. Apply it during early weed stages and development for the best results. When difficult grasses and weeds grow in protected areas, remove them without hassle using Oust Extra herbicide.


It is a violation of Federal Law to use this product in a manner inconsistent with its labeling. For any requirements specific to your State or Tribe, consult the agency responsible for pesticide regulation. 


For additional information on this product please reference the Material Safety Data Sheet and Product Label listed below.

Active Ingredient(s)

Sulfometuron Methyl 56.25%, Metsulfuron Methyl 15.00%

Target Weeds

Perennial grasses, weeds, dandelion, ragweed, broadleaf weeds, grassy weeds, bluegrass, bahiagrass, barnyardgrass, bur buttercup, bur clover, cocklebur, fescue, fiddleneck, fixweed, foxtail, foldenrod, johnsongrass, little barley, pepperweed, plantain, rye, sandbur, sheperd's purse, signalgrass, sweet clover, wheat, wild barley, wold carrot, wild garlic, wild oat, woody plants, vines

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