If brush is piled there it will sterilize the existing native vegetation, soil, and seed bank and the area will fill with weeds. Cut at the time of flowering in order to remove the reseeding potential. Properly timed fire or cutting may be appropriate. Leafy spurge is a serious problem that can completely overtake grasslands. It aggressively colonizes disturbed areas.
Yearly vigilance is required.
Routine management and succession to prairie will set back these species. This method is being studied for its effectiveness against leafy spurge and purple loosestrife. Thorough studies need to be done in order to identify adverse effects on native species. The user has a responsibility to review and understand these effects. Agriculture Research Service, as well as university agricultural research centers.