Contact Us

Todd Abrahamson, Secretary
Plant and Pest Diagnostic Laboratory
Purdue University
915 West State Street
West Lafayette IN 47907-2054
Email: abraha15@purdue.edu​
Voice:765-494-7071
FAX: 765-494-3958

For general questions about plant care, please contact your local county Extension Educator. 

 

PPDL Staff and Departmental Diagnostic Liaisons

Plant and Pest Diagnostic L​aboratory​

  • Tom Creswell, Lab Director
  • John  Bonkowski, Plant Disease Diagnostician

Botany and Plant Pathology

  • ​​Marcello Zimmer: Agronomic Weed identification and control; diagnosis of herbicide injury on field crops
  • Lisa Gross: Webmaster and Extension assistance 

Entomology

  • Timothy Gibb: Invertebrate and other pest identification and control
  • Cliff Sadof: Ornamentals and Pest Management

Horticulture

Agronomy

Forestry

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