Tiny wasps to the rescue: Sustainable management of invasive insects Dr Paula Shrewsbury, an Associate Professor and Extension Specialist in the Department of Entomology at the University of Maryland, presents this fascinating insight into tree pests. Introductions of exotic, invasive species is on the upswing world-wide. Many of which are devastating economically and ecologically. Approaches including classical biological (release of natural enemies from the pest insect’s native range into t...