4b4845dc_imber_Surveys___Causes_of_Damp__Tunnels
[Common Name] Death watch beetle [Latin Name] Xestobium Rufovillosum [Type] Small insect [Wood Targeted] Hardwood with decay present e.g. Oak, Elm [Spreads] Flight to neighbouring Softwood if decaying [Damage to wood] Extensive internal tunnelling, Can be with Donki white rot. [Frass (bore dust)] Very gritty, plenty of frass, large bun shaped, visible to naked eye [Emergence holes] 3mm [Tunnels] 
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Aquarius Timber Preservation | Damp Timber Surveys | Causes of Damp
Tunnels