Madrone is very susceptible to P. ramorum (pathogen known to cause SOD), and in rare occasions it may support pathogen sporulation enough to cause infection of nearby oaks. Adult madrones typically experience dieback of infected branches, but they are rarely killed by the pathogen. However, seedlings and saplings can be killed and should be removed if growing within 30 feet of oaks.
How susceptible are madrones to P. ramorum/sudden oak death (SOD)?
