Treating Invasive Annual Grasses

*information provided by Brain Mealor, Director of the Institute for Managing Annual Grasses Invading Natural Ecosystems (IMAGINE) and compiled into infographic by Good Grazing Makes Cent$

timing

Herbicide

implementation

Spray application of chemical like Imazapic (multiple trade names, with Plateau and Panoramic as the most common) or Idaziflam (trade name Rejuvra)

varies according to location, yearly weather patterns, and the herbicide active ingredient

Multiple considerations will impact proper herbicide treatment including active ingredient in herbicide, terrain, weather, location, invasion severity, and more.

cost

varies depending on herbicide, application method, and economies of scale.

treating invasive annual grasses

timing

prescriptive grazing

balance between when targetted invasives are palatable and desirable whie perennial grasses are least susceptible to damage

implementation

Timed grazing in an effort to potentially stress annual grasses and improve range conditions via other impacts like litter management.

Carefully timed grazing and appropriate intensity are critical.

cost

grazing for control can provide economic benefit for forage availability

• Cheatgrass
• Medusahead
• Ventanata

timing

implementation

Reseeding

following treatment in a highly invaded area with little recovery potential

Reseeding may not always be necessary, but could be a critical step in recovering rangeland if few or no desirable species exist in invasion site.

Renovating rangeland with little to no perennial plant populations by introducing native seeds.

cost

seed and implementation prices vary