The wharf-borerNacerdes melanuraL., a threat to stored archaeological timbers

Abstract

A survey of stored waterlogged archaeological timbers from the Mary Rose revealed that 2% of these timbers were infested by larvae of the wharf-borer beetle, Nacerdes melanura L. Timber species attacked included oak, poplar and pine, with moisture contents ranging between 130 and 670%. In addition, scanning electron microscope studies demonstrated that wood tunnelled by the larvae was microbially decayed. The larvae and their life-cycle were studied and emerging adults were observed penetrating the 500 gauge polyethylene used to wrap timbers. Studies showed that 60 Nylon/100I Surlyn, 70 Nylon/125I Surlyn, T 1–19v, T 1–25x and Camvac were more suitable wrapping materials.

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