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Reddish brown gum deposits and frass (excrement) and a larva of peachtree borer, <i>Synanthedon exitiosa</i> (center), exposed under bark. — Reddish brown gum deposits and frass (excrement) and a larva of peachtree borer, Synanthedon exitiosa (center), exposed under bark.
Credit: William W. Coates