4b4845dc_imber_Surveys___Causes_of_Damp__Tunnels
[Common Name] Pest [Latin Name] Ptilinus Pectinicornis [Type] Small insect [Wood Targeted] Sapwood of some European Hardwoods in wood yards >% starch [Spreads] Flight, stays in timber yards in seasoning wood [Damage to wood] Severe tunnelling, mainly along grain to start, surface left [Frass (bore dust)] Hard compacted frass, flour like [Emergence holes] 2mm [Tunnels] 
Round but full of frass
Aquarius Timber Preservation | Damp Timber Surveys | Causes of Damp
Tunnels