Envu Announces New Herbicide, Marshal Imazapic, for Invasive Species Control

The new product targets invasive annual grasses prominent in the Western U.S.

Published on Mar. 2, 2026

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Envu, a leading agricultural company, has announced the introduction of a new herbicide called Marshal Imazapic. The product, featuring the active ingredient Imazapic, is designed to target invasive annual grasses that are a major problem in the Western United States. When tank-mixed with Envu's existing herbicide Rejuvra, Marshal Imazapic can provide superior control and a more flexible application window for ranchers and landowners.

Why it matters

Invasive annual grasses like medusahead, cheatgrass, and ventenata have become a significant challenge for ranchers and land managers in the Western U.S., crowding out native vegetation and reducing forage quality. Envu's new Marshal Imazapic herbicide offers a new tool to help combat these problematic weeds and improve rangeland health.

The details

Marshal Imazapic is currently the only Imazapic-activated product labeled to combat medusahead, a particularly troublesome invasive grass. The herbicide can be used for both pre- and post-emergence control of a wide variety of invasive species and problem weeds. When tank-mixed with Envu's existing Rejuvra herbicide, Marshal Imazapic can help establish long-term seedbank herbicide management and control for resistance.

  • Envu announced the introduction of Marshal Imazapic on March 1, 2026.

The players

Envu

A leading agricultural company that develops herbicides and other products for the range and pasture industry.

Justin Hossfeld

Envu Range & Pasture national sales manager, who discussed the benefits of the new Marshal Imazapic herbicide.

Rejuvra

An existing Envu herbicide that can be tank-mixed with Marshal Imazapic for improved control and a more flexible application window.

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What they’re saying

“At Envu Range & Pasture, our mission is to provide ranchers and landowners with the tools that offer the highest level of success, grow return on investment, and increase their healthy forage.”

— Justin Hossfeld, Envu Range & Pasture national sales manager (americanagnetwork.com)

What’s next

Ranchers and landowners can learn more about Marshal Imazapic and how it can help improve their operations on Envu's website.

The takeaway

Envu's new Marshal Imazapic herbicide provides ranchers and land managers in the Western U.S. with an important new tool to combat invasive annual grasses that have become a significant challenge in the region. By offering a flexible, effective solution, Envu is helping to improve rangeland health and productivity.