2 – 4 mm
The female biscuit beetle lays her oval eggs in and about food materials, and they hatch in a few days. The full-grown lava pupates in a silken cocoon with bits of foodstuff incorporated into it, and pupation lasts 12-18 days. The complete life cycle egg to adult usually takes about 7 months, but there maybe 1-4 generations per year depending on the temperature. Complete metamorphosis.
The biscuit beetle attacks a host of items that include any household food and spice, as well as such things as drugs, hair, horn, leather and museum species. Most commonly attacked are bread, flour, meal, breakfast foods, and condiments such as red pepper. It is also a pest of books and manuscripts. Adults can fly and are attracted to light.
Reasons for Control
Prevention of contamination and damage, loss of quality, cross infestation, loss of goodwill, to comply with UK Legislation.