Various research projects around the world are looking at the effect of GMCs on biodiversity since several years. New results are emerging now. The conference "Biodiversity Implications of Genetically Modified Plants" in Ascona, Switzerland, from 7th to 12th September 2003 will offer an open audience of experts the chance to hear and discuss the latest results.The conference organizers are Dr. Angelika Hilbeck, ETH Zurich, Switzerland and Dr. Ruud de Maagd, PRI Wageningen, The NetherlandsSpeakers include David Andow, University of Minnesota, St.Paul, USA, Miguel Altieri, University of Berkeley, Berkeley, USA, Weber Amaral, IPGRI, Rome, Italy and Sao Paulo University, Brazil, Les Firbank, Centre of Ecology and Hydrology, Merlewood, UK, Baoron Lu, Fudan University, Shanghai, China, Allison Snow, Ohio State University, Columbus, USA;<a href="http://www.geobot.umnw.ethz.ch/bigmp/bigmp.html">Conference web site</a>