How can I tell if my trees have SOD?

Sudden Oak Death can kill oak and tanoak trees but it vectored, or spread, primarily through the leaves of California bay laurel. You can see what SOD symptoms on bay leaves look like in this picture. In the spring of each year the lab hosts the SOD Blitz Survey Project where you can learn to spot SOD infections, collect leaves on your trees, and have them tested for SOD.

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