Charles Sturt University (CSU) Professor of Applied Ecology Geoff Gurr will address one of the world’s most urgent challenges when he delivers the Poggendorff Lecture for 2013 as part of National Science Week. The biennial lecture is an initiative of the Royal Society of NSW in honour of Walter Hans George Poggendorff, the eminent Australian agriculturalist and member of the society, and covers agriculture in a broad sense. Professor Gurr, from CSU in Orange, will address the topic ‘Biodiversity and the future of agriculture’. “One of the greatest challenges the world is facing right now is how we plan to feed the estimated population of 9 billion by 2050,” he said. “Not only do we have to meet that challenge, we have to do it in the face of declining availability of good-quality land and water, and the need to preserve biodiversity to provide critical ecosystem services.” Professor Gurr will draw on his international research program to explain how biodiversity can be harnessed to provide effective pest suppression and illustrate how on-farm biodiversity can advantage growers and the wider community.