The emerald ash borer (EAB) is an invasive Asian buprestid in North America, and the cause of extensive ash (Fraxinus spp.) mortality throughout southeastern Michigan and southwestern Ontario. Other EAB infestations are now known in Ohio, Indiana, Virginia, and Maryland due to the transport of infested ash nursery stock, logs, and firewood. Efforts to eradicate EAB are proving difficult due to EAB biology and the difficulty in quarantining such a large infestation. If eradication efforts are abandoned, biological control will be the primary management option. We will present a summary of our research findings on EAB natural enemies in Michigan and in two provinces in northeast China.