The survey revealed that Over sixty trees possessed active or recently dried bleeding spots. Of these sixty trees, twenty were tested by Dr. Rizzo's group for presence of the fungus and ten of these tested positive. Twenty trees showed evidence of crown death. Most sick trees appear to be at an early stage of infection and show no signs of sickness other than the bleeding spots. Afflicted trees can be found throughout the 210 acre Preserve.
Most trees still show no signs of being affected by the disease.
Positions of about 20 trees have been mapped using GPS and we have collected the following data about each tree. In the morning, researchers from the University of California described what we presently know about Sudden Oak Death. In the afternoon, attendees formed break-out sessions to discuss approaches to studying the spread of Sudden Oak Death in Sonoma County and at the Preserve in particular. We also focused on the application of biotechnological approaches to studying and combating the spread of the disease. The SOD website reports on the progress of the disease in California.