How do I know if my area has been evaluated for sudden oak death?

If you live in a California county that is known to have sudden oak death (SOD), you can check to see if your area has been evaluated for the presence of the pathogen that causes SOD (Phytophthora ramorum) by downloading the free SODMAP Mobile app.  Doing so will allow you to see if trees have been sampled in your area, what species were sampled, what year they were sampled, and if they were positive or negative for the pathogen. While the app is fairly intuitive, if you need instruction on how to use it, go to


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