What plant species does SOD affect?
Presently, the host range for SOD is broad. To date, it has naturally infected and killed or injured at least 28 host species and has been recovered from an additional 30 plant species. Examples are various species of west coast oak, coast redwood, and Douglas fir, which are all susceptible to bark cankers. Examples of hosts susceptible to twig or foliar blight are species of Camellia, Rhododendron, Vaccinium, and Viburnum. Visit the following site for the most current and complete lists of regulated and associated hosts: www.aphis.usda.gov/ppq/ispm/sod • How does SOD spread? SOD most likely spreads through infected plant material, rainwater, and soil. Moist, cool, windy conditions are thought to spread the pathogen by dispersing spores from the leaves of foliar hosts. • What are the symptoms of SOD? On trees susceptible to the most virulent form of the disease, large, bleeding cankers form on the trunk or main stem accompanied by browning of leaves. Infected trees may die within sever
