• Herbicide

Control weeds nearly anywhere they grow

HighNoon® herbicide offers an unmatched combination of use site flexibility, safety on desirable grasses and forbs, and an extensive weed control spectrum. As the new standard in western rangeland herbicides, HighNoon simplifies product selection and application — without sacrificing results.

Performance & Product Comparisons

HighNoon® herbicide offers residual activity and improved efficacy on key species. This enhances performance where other herbicides are weak to support land preservation and environmental stewardship. Our interactive resource details how HighNoon simplifies product selection for ranchers, land managers and stewards working throughout select states in the West.

View Interactive Fact Sheet


poison hemlock leaf

Control more tough weeds

HighNoon provides extended control of 140+ weeds, including thistles, knapweeds, ragweeds, poison hemlock and skeletonweed.

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Cattle on a mountainside

Unmatched application flexibility

Controls tough weeds across multiple use sites, including rangeland, hayfields, roadsides, rights-of-way and habitat areas.

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HighNoon® Herbicide Expert Discussion

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Application and Use Site Flexibility

HighNoon® herbicide gives ranchers, land managers and county noxious weed specialists the flexible tool they need to help manage the toughest broadleaf weeds nearly anywhere they grow across the diverse Western Rangeland region.

Range & Pasture

Wyoming rangeland

HighNoon provides a single product that controls broadleaf weeds, delivers residual weed control and stops several undesirable woody species — but with application flexibility across a wide range of sites.

For added convenience and ease of use, HighNoon carries no grazing restrictions for any class of livestock. Count on HighNoon to control many of the toughest broadleaf weeds and woody plants on rangeland and permanent grass pastures resulting in an abundant, high-quality forage base.


Road between mountains

Winter annual grasses, broadleaf weeds and woody plant species pose a threat to roadside safety and transportation infrastructure. As an impactful replacement for Milestone® herbicide, HighNoon® herbicide offers an effective solution that can knock those species back and prevent further encroachment.

Utility Sites

Western rangeland

In addition to using HighNoon to enhance total vegetation control throughout utility substations, vegetation managers can control incompatible vegetation, improve right-of-way accessibility and support the development of native plant communities that represent biodiverse habitat for various wildlife species.

State Registrations

  • Registered
  • Unregistered

Industry Resources for the Western Rangeland

The impact of your work can reach far beyond the land you manage. Explore the following resources to discover digital training opportunities and reduce the threat of wildfires in your respective territory.       


Vegetation Education

New trainings at your finger tips. Access 8 self-guided trainings and countless resources to become the Vegetation Management expert. 

Go to Website
Fire along a roadside

Fire Prevention and Restoration

Explore best practices for fuel source management, ignition prevention, fuel break establishment and more.

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Two lane highway with mountains

TechLine Invasive Plant News

Western invasive plant managers weigh-in with research insights and helpful tips to optimize results.

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Other products

Looking for similar or complementary products? Explore out portfolio of related solutions.

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Under normal field conditions HighNoon® is nonvolatile. HighNoon 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.  HighNoon and Milestone® have 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 HighNoon and 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. HighNoon, 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.