Anobiid Powderpost Beetle

Natural populations of these powderpost beetles occur in dead branches and down timber outdoors; infestations of structural wood or ornamental pieces probably originate from outdoors. The larvae can feed in both hardwoods and softwoods, but are most commonly found in softwood. The minimum wood moisture for larval development has not been accurately determined.

Anobiid powderpost beetles have a 1-5 year life cycle, depending on the quality of the wood infested, the fluctuations in temperature, and the moisture content of the wood. The larvae feed in the sapwood portion of the wood, and both new (less than 10 years) and old wood are attacked. The adult beetles usually begin emerging from infested wood in early spring, and continue till mid-summer. The adults are nocturnal, and they become most active on the surface of the wood between dusk and midnight. Females mate often during their lifetime. The total number of eggs laid per female is about 50. The susceptibility of various kinds of wood to attack by this species depends on the age of the wood, surface features, and the species of wood. Females prefer to lay eggs on hardwoods, rather than softwoods, and prefer rough wood surfaces.