The polyphagous shot hole borer (PSHB), a parasitic ambrosia beetle from South East Asia, is causing great concern in Somerset West where it has infested a great number trees. Tune in to What’s the Buzz on Radio Helderberg 93.6fm at 11.30am to find out more, when Norman McFarlane talks to Professor Francois Roets from Stellenbosch University’s Department of Conservation Ecology and Entomology.