Ornamental Pathology Staff

Dr. Janna Beckerman Assistant Professor of Plant Pathology Purdue University Botany and Plant Pathology, Lilly Hall 915 West State Street West Lafayette, IN 47907-2054 Office: LILY 1-321 Phone: (765) 494-4628 FAX: (765) 494-0363 E-mail:

Program Description:

Phytophthora citricola causes both a root rot and trunk canker in over 45 species of plants, but has only been reported as a seedling root rot of black walnut. We have identified this pathogen as causing a stem canker of black walnut in Indiana, and are currently working on developing a better understanding of this pathogen so we may better manage this disease.

Photo provided by Guillermo Padillo	Black walnut scion inoculated with P. citricola, 36 hr post-inoculation

Ornamental Pathology Extension Publications