. "Brice McPherson, an associate specialist in UC Berkeley's Department of Environmental Science, Policy, and Management (ESPM), led the study, and ESPM professor emeritus David Wood was a co-author.The novel method employs ???biomarkers??? of resistance, in this case compounds found in the phloem (inner bark) of coast live oaks that can indicate whether a tree is resistant or susceptible to P. ramor" . . .