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Publicado el 11-17-2009
Reportero: Maggie L. Moor-Orth

Firewood pests

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Maggie L. Moor-Orth

November is here and we all have to face the facts that colder temperatures are demanding that we turn on our home heating systems or light our woodstoves and/or fireplaces. At our house, we have had our cut firewood stacked by the hedgerow since spring. Who knows what will crawl out of it when it is warmed by indoor temperatures!

If you also bring in wood to burn in your fireplace or woodstove, you may have noticed a few insects emerging from the wood. They are living in wood or just under the bark where they are over-wintering. As the split wood becomes room temperature, insects are fooled into thinking it is spring. These nuisance insects include wasp carpenter ants, wood roaches, earwigs, powderpost, long-horned and bark beetles. The occasional wasp that is found creeping from or near the stacked wood can be easily killed using a fly swatter or an indoor flying insect spray.

Carpenter ants are predominately black colored and vary in size (from _ inch to _ inch); they have a very narrow waist. They tunnel into diseased moist wood -- for example, an old stump, fence post or large pieces of wood (like stacked firewood) -- in order to increase their nest size. They are nocturnal creatures, and if seen during the day, they are searching for food or water.

Powderpost, long-horned and bark beetles are usually wood boring while in the larval stage. They live in fresh cut logs or living trees they do not infest dead trees or dry wood. Adults usually enter through the bark crevices, a wound or scar on the tree. You may notice sawdust accumulated around the holes or found on the ground just below small holes in the wood. Powderpost beetles feed only on dead wood. They are brought into the home on infested wood. Adult female beetles lay their eggs in unfinished wood. The hatched larvae or grub tunnel through the wood.

Long-horned beetle larvae are whitish and legless, and can be seen crawling around on stacked firewood. The adult are bullet shaped with long antennae. Adult bark beetles, tunnel directly through the bark to the cell tissue leaving a very characteristic gallery or tunnel. The beetle larvae hatch and feed ...
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