2005 Annual Report 4d.Progress report. This report documents research conducted under Specific Cooperative Agreements between ARS and Michigan State University. Additional details of research are in the report for the parent research project 3607-22000-009-00D, Management Of Japanese Beetle and other Beetles Of Quarantine Significance In Nursery Crops. The emerald ash borer is an extremely destructive new insect pests in Michigan and Ohio. Insecticide treatments and an “ash garden” were established in the zone of infestation of the borer in Michigan to help provide information about this new pest. Use of the pesticide imidacloprid as a drench to healthy trees gave 95-100% control of EAB larvae. In addition, it appears that tree injections and trunk and foliar sprays may give moderate to high control. Surveys have been established to monitor the spread of the EAB. It was shown that woodpecker feeding injury to ash trees was a reliable tool for detecting the pest. Additional information from these studies will help in both the short term eradication programs against this invasive species, and in the long term relationship of this insect in North America.