The emerald ash borer (EAB), Agrilus planipennis Fairmaire (Buprestidae), a native of Asia, was discovered in the USA and Canada in 2002. This serious pest of ash trees (Fraxinus spp.) infests and quickly kills trees by mining the cambium area, disrupting the tree’s transport system. As newly infested trees do not typically show distinctive external visual symptoms there is a growing need to be able to trap adult beetles so that accurate surveying can be done. In Michigan, during the 2004 and 2005 flight seasons we collected bark volatiles from healthy and girdled (stressed) trees using Super-Q cartridges. Ratios of bark emitted monoterpenes and sesquiterpenes were determined for both girdled and non girdled trees. Compounds were identified by gas chromatography (GC) and mass spectrometry (MS) and screened for EAB antennal activity using electrophysiological techniques. Lures were then developed and field tested in both marshalling yards and ash stands during 2005.