bark beetle

Bark beetle (Hylastes salebrosus). Photo: Jeffrey W. Lotz, Florida Department of Agriculture and Consumer Services, Bugwood.org

Updated: March 10, 2021

Beetles in firewood stored indoors

  • Several types of beetles may emerge from firewood that is stored indoors.

  • Bark beetles are 1/4 inch or less, cylindrical in shape and red, black, or brown in color.

    • They may be found around windows, lamps or woodpiles near the fireplace, especially during the winter.

    • Check firewood logs for small, round holes in the bark.

  • Larger wood boring beetles may also be seen.

    • They may be metallic wood borers (two-lined chestnut borer, approximately 1/2 inch long, narrow, variously colored, with short antennae) or long-horned beetles (redheaded ash borer, 1/2 inch or longer, narrow, variously colored, long antennae and legs, not metallic).

    • Sawdust may be found under the firewood and oval or D-shaped exit holes may be present in the bark of logs.

two bark beetles

Bark beetles (Subfamily Scolytinae). Photo: Roger Anderson, Duke University, Bugwood.org

redheaded ash borer

Redheaded ash borer. Photo: Jim Baker, North Carolina State University, Bugwood.org

  • Both types of beetles may emerge from firewood that has been stored indoors for several days or more. As the wood warms, they assume it is spring and emerge to fly around the house or congregate in windows.

  • Vacuum and dispose of the beetles outdoors.

  • Only store enough firewood for a day or two to prevent emergence of the beetles.

Rev. 2020

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