Invasive plants flourish in part because in their transition to North America they leave behind the co-evolved pests that help keep them in check in their homelands. Dr. Lisa Tewksbury, Director of the University of Rhode Island Biocontrol Laboratory, describes the painstaking process of introducing to our landscape organisms that can control the invasive plants without harming our native species. Dr. Lisa Tewsbury, Director University of Rhode Island Biocontrol Laboratory

Growing Greener is a weekly program about gardening in partnership with Nature, featuring conversations with leading experts in the field