Disease in Rhododendrons or Azaleas

State plant health officials are advising consumers who bought rhododendrons or azaleas this spring and summer to be on the lookout for signs of a disease that could spread to oaks and kill them. Phytophthora ramorum has been found on rhododendrons at a northern Wisconsin nursery. This fungus causes sudden oak death, which has never been found on the landscape in Wisconsin. Questions can be directed to the UW Plant Disease Diagnostics Clinic. Please review this fact sheet which was recently updated: https://hort.extension.wisc.edu/articles/sudden-oak-death/