New herbicide improves invasive grass control and extends pasture application window
A new herbicide designed to support rangeland and pasture management has been introduced to help ranchers control invasive grasses. Envu recently launched Marshal Imazapic herbicide as part of its Range and Pasture product portfolio.
Marshal Imazapic contains the active ingredient imazapic and is designed to manage invasive annual grasses that commonly affect rangelands in the western United States. These weeds can reduce forage production, compete with native plants, and impact grazing operations.
“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,” said Justin Hossfeld, Envu Range & Pasture national sales manager.
“With the introduction of Marshal Imazapic, we’re again leading the industry in bringing creative solutions to age-old problems. Marshal Imazapic is another tool in ranchers and landowners’ belts, and when tank-mixed with Rejuvra, they can expect superior control and a more flexible application window,” said Hossfeld.
The product can be used for both pre-emergence and post-emergence weed control. This allows landowners and ranchers to target weeds before they emerge or treat them after they begin growing, giving producers more flexibility in their management programs.
One key feature of the new herbicide is its compatibility with an existing herbicide product called Rejuvra. When Marshal Imazapic is tanked mixed with Rejuvra herbicide, users can extend their application window and improve overall weed control performance.
This combination may also support long-term weed management by helping reduce the weed seedbank in pasture and rangeland systems. Managing the seedbank is important because many invasive grasses can spread quickly and remain active in soil for years.
Marshal Imazapic is currently the only imazapic-based herbicide labeled to control medusahead, an invasive grass that has become a serious problem in many grazing regions. The herbicide also targets several other troublesome grass species that compete with desirable forage.
Weeds that can be controlled using the product include bulbous bluegrass, cheatgrass, feral rye, Japanese brome, jointed goatgrass, medusahead, red brome, and ventenata.
These species are known for spreading rapidly across rangeland and reducing available forage for livestock. Effective control helps protect pasture productivity and improve grazing conditions.
The new herbicide provides ranchers and landowners with another tool to manage invasive grasses and support healthier forage systems. With improved flexibility and compatibility with existing products, the solution may help strengthen long-term rangeland management programs.
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