Pre-emergent herbicides applied to soil are a primary tool for reducing exotic annual grasses, such as cheatgrass, in sagebrush steppe rangelands. Effective herbicide application can allow existing perennials to grow and spread to outcompete cheatgrass, preventing reinvasion, but most perennials are slow-growing and require more years of relief from annual-grass competition than standard…
This United States Geological Survey news article "Patchy response of cheatgrass to pre-emergent herbicides applied after wildfire" was originally found on https://www.usgs.gov/news
