Companion Publication O'Brien, J.G.; Mielke, M.E.; Starkey, D.; Juzwik, J. In Press. How to Identify, Prevent, and Control Oak Wilt. NA-FR-02-99. USDA Forest Service, Northeastern Area State and Private Forestry. This publication will be available from: USDA Forest Service, St. Paul, MN, 55108. Author Jill Pokorny, Plant Pathologist, USDA Forest Service, Northeastern Area State and Private Forestry Acknowledgments The author wishes to thank the diagnosticians in plant disease clinics at the following universities for sharing their lab techniques and "tips of the trade": University of Minnesota Texas A&M Iowa State University Purdue University University of Wisconsin, Madison University of Illinois Photo Credits Steve Cook, Cook Company, St. Paul, MN Sandra Gould, U of MN, Plant Disease Clinic Rich Hauer, MN Department of Agriculture, Photo Archive Jill Pokorny, USDA Forest Service, St. Paul, MN Stephen Stenger, Kunde Co., Roseville, MN Illustration Credit Julie Martinez, Scientific Illustrator, Minneapolis, MN. Cover Photo Collecting symptomatic red oak branch samples for oak wilt testing.

Northeastern Area State and Private Forestry Offices Headquarters Northeastern Area State & Private Forestry USDA Forest Service 100 Matsonford Road 5 Radnor Corporate Center, Suite 200 Radnor, PA 19087-4585 Durham Field Office Northeastern Area State & Private Forestry USDA Forest Service Louis C. Wyman Forest Services Laboratory P.O. Box 640 Durham, NH 03824-0640 Morgantown Field Office Northeastern Area State & Private Forestry USDA Forest Service 180 Canfield Street Morgantown, WV 26505-3101 St. Paul Field Office Northeastern Area State & Private Forestry USDA Forest Service 1992 Folwell Avenue St. Paul, MN 55108-1099