In areas that are not mowed annually, semi-woody stems can accumulate and hinder grazing. Although there is no scientific evidence, it is believed that pepperweed is toxic and could pose a threat to livestock. Control The best method of managing perennial pepperweed is to prevent the weed from becoming well established. Minimizing soil disturbances from vehicles, machinery and overgrazing will reduce areas where the weed might become established. Healthy, vigorous grass stands that are properly managed can limit the establishment and growth of weed populations by using resources needed by weeds.
Early detection is vital to prevent invasion.
Survey your land three times a year and remove any individual plants before they become established. If you discover an infestation, containment is critical. The most effective method of containment is to spray borders of the infested areas with a herbicide. Lastly, limit perennial pepperweed seed dispersal. Once perennial pepperweed is established, control is difficult because the plant is so competitive and spreads rapidly by its creeping roots.