Ornamental Pathology





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:    jbeckerm@purdue.edu

Program Description:

Black walnut treePhytophthora citricolaBlack walnut stem 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.

Photos provided by Guillermo Padillo, Black walnut scion inoculated with P. citricola, 36 hr post-inoculation (L)

Purdue University Green Industry Working Group


 Ornamental Disease Publications


 Disease Management for Horticultural Crops Publications