Highnoon™ Herbicide — Land Management
Western rangeland fence line


Once registered by the EPA, HighNoon™ herbicide is anticipated to be the new standard in western rangeland herbicides offering an unmatched combination of weed control spectrum, safety on desirable grasses and forbs, and use site flexibility.


Improved Forage Quality and Quantity

  • Controls Broadleaves and Annual Grasses
  • Controls A Broader Spectrum of Weeds than Milestone® Herbicide with Very Similar Safety on Desirable Species
  • One Jug Controls Over 140 Weeds

Peace of Mind

  • No Grazing Restrictions for Any Class of Livestock
  • Combination of Two Reduced Risk Herbicides
         - Including one Green Chemistry Challenge Award winner (Rinskor active)
  • Non-Volatile
  • Low Odor
  • Safe on Grass


Technical Specifications

Anticipated Timing and Application Methods

Ground Broadcast Application: Spray volumes greater than ten gallons per acre generally provide better coverage and better control.

Aerial Broadcast Application: Use two gallons or more per acre total spray volume. Five gallons per acre or greater will generally provide better coverage and better control, particularly in dense and/or tall foliage. High-

Volume Foliar Application: High volume foliar treatments may be applied at rates equivalent to a maximum of 20 fluid ounce per acre per annual growing season.

Spot Application: Spot treatments may be applied at 40 fluid ounces of HighNoon™ herbicide per acre, as long as an application is not made to more than 50% of the treatable acre.

Application Timing: Treat when weeds are actively growing and not stressed by drought or other condition. Increase herbicide rate within the labeled rate range as the season progresses and plants become more mature. Higher rates will produce an increase in residual.

Anticipated Adjuvant Recommendations

Non-Ionic Surfactant: 0.25% volume per volume (1 to 2 quarts per 100 gallons of spray)


Methylated Seed Oil: 1% volume per volume

Use Sites



Permanent Grass Pastures and Hay Acres

Reserve Program (CRP)

Non-Crop Land Areas

Controlled Weeds

This product delivers effective weed control against 140 broadleaf weeds and woody plants including the following: 

  • Amaranth, Spiny (Amaranthus spinosus)
  • Annual broomweed
  • Black locust
  • Broomweed, Common, or Annual (Gutierrezia dracunculoides)
  • Cocklebur
  • Dock, Curly (Rumex crispus)
  • Gumweed, Curlycup (Grindelia squarrosa)
  • Horsenettle
  • Knapweed
  • Locust, Honey (Gleditsia triacanthos)
  • Mullein, Common (Verbascum thapsus)
  • Plantain
  • Poison-hemlock
  • Silverleaf Nightshade
  • Snakeweed, Broom (Gutierrezia sarothrae)
  • Thistle, Canada (Cirsium arvense)
  • Thistle, Musk
  • Wild carrot
  • Wormwood, Absinth (Artemisia absinthium)

Refer to the Product Label for complete product efficacy information.

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HighNoon has not yet received regulatory approvals; approvals are pending. Milestone® has no grazing or haying restrictions for any class of livestock, including lactating dairy cows, horses (including lactating mares) and meat animals prior to slaughter. Label precautions apply to forage treated with Milestone and to manure and urine from animals that have consumed treated forage. State restrictions on the sale and use of Garlon 4 Ultra and Milestone apply. Consult the label for full details.

When treating areas in and around roadside or utility rights-of-way that are or will be grazed, hayed or planted to forage, important label precautions apply regarding harvesting hay from treated sites, using manure from animals grazing on treated areas or rotating the treated area to sensitive crops. See the product label for details. Vastlan and TerraVue are not registered for sale or use in all states. Contact your state pesticide regulatory agency to determine if a product is registered for sale or use in your state. Always read and follow label directions. © 2021 Corteva.