Sudden Oak Death and Ramorum Blight

Authors

Marion Murray, Utah State UniversityFollow
Ann Mull, Utah State UniversityFollow

Document Type

Factsheet

Publisher

Utah State University Extension

Publication Date

9-13-2023

First Page

1

Last Page

4

Abstract

Sudden oak death (SOD) and ramorum blight are caused by Phytophthora ramorum, a non-native water mold (oomycete) that originates from parts of Asia. Sudden oak death was given its name due to the appearance that entire trees were dying in just 2 to 4 weeks. In reality, the disease progresses over an extended period, estimated at more than 2 years after initial infection. Ramorum blight is nonlethal, typically causing foliar browning and wilting. This fact sheet discusses impact, damage and symptoms, plant hosts, disease cycle, and management.

Recommended Citation

Murray, M. & Mull, A. (2023). Sudden oak death and ramorum blight [Fact sheet]. Utah State University Extension.