General Sapwood and heartwood
of partially decayed hardwoods, chiefly oak.
Solid timber Often found in
historic buildings where large quantities of oak or elm used structurally.
Softwoods rarely attacked except when in contact with infested hardwood.
Dampness essential for establishment and promoting rapid development,
although attack can continue, albeit slowly, in drier timber.
Found particularly in areas prone to
dampness - wall plates, ends of floor joists, lintels and other
built-in timbers. Damage often extreme in concealed bearing ends
of timbers inserted into damp walls. In conjunction with fungus
may hollow out centre of large section beams.
Emergence holes Circular,
3 mm diameter
Tunnels Circular, 3 mm diameter. Often extensive, random
orientation, mainly in direction of grain. Bore dust Cream-coloured,
disc-shaped pellets. Gritty when rubbed between fingers.
Likely misidentifications Common furniture
beetle, Bostrychid powderpost beetle, bark borer beetle, wood wasp,
page Dermestid beetle, Tenebrionid beetle, bees or wasps,