Diagnosis of Phytophthora ramorum in Trees
University Outreach Publication
The organism shown to be responsible for SOD (sudden oak death) is Phytophthora ramorum, a fungus/yeast-like brown algae. This pathogen generates a number of symptoms in the trees infected. Of the trees and large shrubs shown to be infectable with this pathogen, some species have more serious stem and branch lesions like oaks, while other species have primarily leaf and twig lesions. In a single landscape, multiple hosts can keep the pathogen present for further attacks.
This publication was prepared by reviewing approximately 35 research or disease announcement publications in Europe and North America. In addition, a number of factsheets and synthesized information guides were reviewed for continuity. This publication is designed for field diagnosis of SOD-like symptoms and related symptom sets on community trees. This publication should not be used in tree nursery situations, and is not a pathogen centered review. It is critical to seek pathological expertise and testing for confirming disease organism presence. A selected bibliography is available entitled Sudden Oak Death – SOD: Bibliography of Important Literature.
Citation: Coder, Kim D. 2004. University of Georgia, Warnell School of Forest Resources outreach publication SFR04-1. 2pp.
Kim D. Coder
May 2004
Warnell School of Forest Resources, University of Georgia
Athens, GA
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Diagnosis and Treatment, Disease, Forest Health, Health (tree), Plant Health Care
Southern (USDA FS)
Oak diseases, Phytophthora ramorum, Ramorum blight, SOD, Sudden oak death
