The House Longhorn Beetle creates severe internal damage with lots of frass; tunnels truly oval and tend to coalesce. The surface of the wood often remains as a thin sound veneer in a severe attack. What should be noted is this type of woodworm is typically restricted to the South East of England. If the House Longhorn Beetle is still active this will require urgent woodworm treatment.
Wood Boring Weevil
The Wood Boring Weevil is normally found in timber decay. The Wood Boring Weevil will attack rotting softwood and hardwood. The rotting wood and damage from the Wood Boring Weevil will be readily evident. The tunnels dug by this type of woodworm will run along the grain, frequently breaking at the surface. Any clearly identifiable emergence holes are ragged and around 1mm in diameter. The frass created by a Wood Boring Weevil is also gritty and somewhat like that of the Common Furniture Beetle. In order to identify this type of woodworm look at the rot and general damage running along the grain, often breaking at the surface.
Death Watch Beetle
The Death Watch Beetle prefers hardwood and causes damage to old buildings such as churches. The damage caused by the Death Watch Beetle looks something like Large Common Furniture Beetle damage. There will be round holes evident which are around 3mm in diameter. There is normally extensive tunnelling evident with this type of woodworm. There are often lots of frass present so give the timber a shake – the frass will typically be ‘bun’ shaped and readily visible to the naked eye.
The attacked wood in question is normally always hardwood with some degree of decay. However, the Death Watch Beetle will attack softwood if it is well rotted and has been in contact with hardwood. The Death Watch Beetle is not typically seen in Scotland or Northern Ireland.