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Cutting away tree limb bark to inspect a Phytophthora trunk canker and crown rot, caused by Phytophthora mengei (= P. citricola).

Phytophthora canker, monitoring. Cutting away limb bark to inspect canker underneath. Santa Barbara Co. Credit: David Rosen
Cutting away tree limb bark to inspect a Phytophthora trunk canker and crown rot, caused by Phytophthora mengei (= P. citricola). Credit: David Rosen
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