{Project} Biologische Regulierung der Ackerkratzdistel. [Biocontrol of the creeping thistle.] Runs 2003 - 2005. Project Leader(s): Wyss, Eric, Research Institute of Organic Agriculture (FiBL), CH-5070 Frick. More information online at <http://www.zoology.unibe.ch/ecol/bacher/nativebc.htm>.