The Purdue Plant and Pest Diagnostic Laboratory



Tom Creswell, Director
Plant and Pest Diagnostic Laboratory
Purdue University
915 West State Street
West Lafayette IN 47907-2054

Voice: 765-494-7071
FAX: 765-494-3958


For more information on submitting samples to the lab, email us at . To submit a digital image for diagnosis, see our digital submission site.


For general questions about plant care, please contact your local county Extension Educator. Outside Indiana? Use this interactive map to find your local county Extension office


Contact Purdue Extension: Knowledge to Go
1-888-EXT-INFO or 1-888-398-4636


Having problems with the web page? Send an email to:

Lisa Gross,





Purdue Plant & Pest Diagnostic Lab Purdue Cooperative Extension Service