Nursery-Strain of Sudden Oak Death Found in Sierra Nevada.

A Disease Note in the scientific journal Phytopathology records the first instance of Phytophthora ramorum, the causal agent of Sudden Oak Death, found in the Sierra Nevada foothills of California. The June 2014 article (PDF link) is the first time that the “NA2” lineage of SOD, that is usually only found in commercial nurseries, has […]