Small piles of sawdust on the ground may indicate the presence of insects in the timber.
Only the larvae of wood-eating insects (capricorn beetle, lyctus, deathwatch beetle) feed on wood. The woods having been contaminated by a fungus, due to moisture problems, are more tempting for some insects, such as the big beetle.
Termites are the only representatives of the isopteran order that is composed by 281 sorts and 2600 species. Sometimes called white ants, they are social insects that live in hierarchical colonies, which are organised into castes.
To live, they absolutely need moisture, as well as materials such as sand or soil
They mainly attack wood (cellulose), papers, cellulosic materials, and fabric
Capricorn beetle is an insect of the Cerambycidae family, with a wood-eating larva.
The adult male is 8 to 15 mm long; the female is 10 to 25 mm long. The body is flattened, black, partly dark brown, with a long grayish pubescence along the prothorax. The larva measures 15 to 30 mm in length.It is ivory white.
The exit holes of the beetle are oval-shaped (6 mm) and often blocked by wood flour. This insect attacks the softwood (pine, fir, spruce) on framings, floors, and joists
Deathwatch beetle is the common name given to some coleopterans, small wood pests, of the family of anobiides.
Larvae dig or drill timber, thus gaining the name "borer insects"
They cause damage to furniture or structures. The exit holes of the deathwatch beetle are round in shape (2 to 3 mm).
. This insect attacks all species of wood (mostly sapwood) furniture, books, old flooring, and joinery.
Lyctus is a sort of wood-eating beetle, of the family of Bostrychides.
The insect is from 2.5 to 8 mm long, with a very thin body, red to reddish brown, usually darker head, rows of dots on elytra. The larva measures up to 6 mm long, worm-shaped, ivory white, part of the chest with 3 pairs of legs well discernible.
The exit holes of lyctus are slightly oval in shape (1 mm). This insect attacks hardwood aubiers, rich in starch (oak, chestnut, ash, framiré, ayous) on floors, wall plates, furniture.