Sonja Birthisel, PhD Student in Ecology and Environmental Sciences Eric R. Gallandt, Professor of Weed Ecology and Management Solarization is the practice of using clear plastic mulches to trap solar energy, heating soils to temperatures lethal to pests including weeds.  Solarization is nothing new; it has been researched and used by growers extensively since the read more Solarization to Prepare a Stale Seedbed