|Boxes · Contacts · Home · Information · Services · Suppliers · Training|
Woodworm or common furniture beetle
After two to four weeks the eggs hatch into tiny grubs (larvae) which eat their way into the timber, where they will stay for two or three years, eating and growing, at the same time creating tunnels through the wood, generally along the line of the grain. The gallery or tunnel is made entirely by mandibles of the larva. Larva may grow to 7 mm. Except for the head the skin is soft and varies in colour from creamy-white through greyish-white to yellow. This goes on unnoticed from the outside surface of the timber, but, when the grubs reach maturity they turn towards an outer surface and then go through a metamorphosis change constructing a pupation chamber just below the surface. The length of the pupal stage is between six and eight weeks.
After pupation, the new adult emerges by biting the cap off this chamber, leaving the typical 'woodworm' or 'flight' hole of about 2-3mm diameter. Emergence of the beetles usually takes place during the months of May to August, but this period may be extended in centrally heated property. As soon as the pupae become beetles, their prime objective is to procreate as they only live for a few weeks.
The insect emerging is a small beetle, between 3 and 5 mm in length. As they fly away, wood dust and larval excreta (frass) may fall out of the hole leaving a characteristic sign of active beetle infestation small piles of fresh dust
|© 2005 University of Oxford · Training/Pests/Woodworm page 3 · Modified by EpA ·|