Welcome to Forest Phytophthoras of the World

Plant pathogens in the genus Phytophthora threaten the biodiversity and sustainability of forest ecosystems worldwide. The aim of the website is to provide science-based information to aid in the understanding and management of the world’s forest Phytophthora species. Fourteen of the most damaging species of forest Phytophthoras are profiled as of December 2014. Click on any Phytophthora species (see left sidebar) to reveal information about the pathogen and the forest disease(s) it causes, access educational and disease management materials, and view scientific  references.

Dr. Jennifer Parke, Editor-in-Chief
Joyce Eberhart, Managing Editor
Oregon State University (USA)

Key to Species - an easy-to-use synoptic key that allows the user to select observable characters of an unidentified Phytophthora to learn which species match those characteristics.

Disease Finder - Find Phytophthora species by host, geographic area, habitat, or disease symptoms.


Illustrated Glossary - with explanatory photos or drawings

Photo Gallery - compare morphological characters among species, view disease symptoms, etc., with easy to use filters.


Contact us with calendar and news items, or to join our mailing list.

Access IUFRO and SOD Symposium proceedings.

Learn about forest Phytophthora expertise around the world.

View useful Phytophthora web resources.