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Apr 192009
Mar 292009
Sudden Oak Death is a disease that has killed hundreds of thousands of trees in California and Oregon. It has infected large areas of live oak and tanoaks forests. This microscope footage shows the zoospores of Phytophthora ramorum, the causal agent of SOD, emerging from the sporangia. Under the right environmental conditions infectious zoospores are released and will infect new host trees. …