Tag: tree disease

Sudden oak death, caused by the pathogen Phytophthora ramorum, is a potentially devastating disease. P. ramorum has been found in nurseries in California, Oregon, Washington, and British Columbia, and more recently in the eastern United States. Sudden oak death causes leaf and shoot blights in most hosts, and is known as Ramorum shoot and leaf blight in the nursery industry. In the forest the fungus can cause bole