• Herbicide

Season-long weed and brush control, application flexibility

Opensight® is a proven, cost-effective granule herbicide offering vegetation managers a convenient season-long solution for hard-to-control weed and brush species, including many glyphosate- and sulfonylurea-resistant species.

Find supplemental labels for this product


Broadest spectrum of control

The soil residual of Opensight® specialty herbicide offers season-long control of more than 170 key broadleaf weed and woody plant species, including thistles, wild carrot, poison hemlock, goldenrods, dandelion, false dandelion, marestail, knapweeds, blackberry, black locust, honeylocust, wisteria and tree-of-heaven.

Excellent tank-mix partner

Opensight is an excellent tank-mix partner for bareground treatments, as well as for woody plant control programs. It increases productivity with season-long control and application flexibility.

Convenient, low-use rate formulation

The convenient dry-granule formulation of Opensight provides broader control with less effort and low use rates (1.5 to 3.3 ounces per acre).

Use sites

Conservation Reserve Program sites

Industrial Sites

Natural areas






Communication Transmission Lines


Controlled weeds

This product delivers effective weed control against the following:

  • Ash
  • Blackberry
  • Buckbrush
  • Carrot
  • Cherry
  • Chicory
  • Clover
  • Dandelion
  • Elm
  • Fir
  • Garlic
  • Horseweed
  • Knapweed
  • Kochia
  • Kudzu
  • Teasel
  • Thistle
  • Tree-of-Heaven
  • Willow
  • Yellow-poplar

Refer to the Product Label for complete product efficacy information.

Find labels for this product

State registrations

  • Registered
  • Unregistered

Stay Connected With Us

Connect with Vegetation Management:


Find Your Local VM Specialist

Technical Specifications

  • Active Ingredient

    Aminopyralid; metsulfuron 

  • Application Rate

    Apply Opensight® specialty herbicide at a rate of 1.5 to 3.3 ounces per acre.

  • Application Method

    Apply Opensight as a coarse low-pressure spray. Do not apply this product with mist blower systems that deliver very fine spray droplets. Spray volume should be sufficient to uniformly cover foliage.

Other products

Looking for similar or complementary products? Check out these related products.



™ ® Trademarks of Corteva Agriscience and its affiliated companies. 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. State restrictions on the sale and use of Capstone, Milestone and Opensight apply. Consult the label before purchase or use for full details. Cleantraxx and Vastlan 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.