Pest Identification

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The Sentricon System

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Lyctid Powderpost Beetle Exterminator

Lyctid Powderpost Beetle

Lyctid Powderpost Beetle

 Adult lyctid beetles range in size from 1/32 to 1/4-inch long.  They are red-brown to brown or black in color, and their prominent head is easily seen from above.  The last two segments of their 11-segmented antennae are expanded into a club.  The tibiae, which are the fourth leg segments, have prominent spurs
 The larvae are tiny “C” shaped grub-like larvae found feeding in tunnels in the wood.  They are usually less than ¼-inch long, with an enlarged first body segment (prothorax) and eight spiracles (breathing holes) in the abdomen.  The last spiracle is very large compared to the others.  These larvae have three-segmented antennae and three-segmented legs.

 Adult females lay 15 to 50 eggs soon after mating deep within the pores of these hardwoods.  Larvae feed on the wood fro two to nine months, then they migrate to near the wood surface and pupate.  The development time depends on the wood’s starch content, they do not infest wood with less emerges through a round hole, 1/32- to 1/16-inch in diameter, in the surface of the wood.  Development (egg to adult) usually requires nine to twelve months but it can be as long as two to four years, or in the South, as short as three to four months.

 Lyctid powderpost beetles infest the sapwood of seasoned hardwoods including oak, hickory, ash, mahogany, and bamboo.  The eggs are never deposited on polished, waxed, varnished, and painted surfaces, so damaged items with these types of finishes must have been infested before they were finished and/or the eggs were laid on an unfinished surface, such as the underside of a table or chair.  They can reinfest the same piece of wood until it is reduced to a shot-hole riddled shell filled with frass the consistency of face powder.  The wood moisture content suitable for larval development is 8 to 32% but is ideal at 10 to 20%.  Adults are active at night and are attracted to light.