Occasional invaders

Booklice: identification & booklice control

Also known as: psocids, paper lice

Booklice (psocids) feed on mold in humid spaces and new construction. Control is entirely about humidity — dehumidification, ventilation and drying, with spot treatment where needed.

Slender thrips insects on a green leaf

How to identify booklice

What it looks like
Tiny soft pale gray or tan wingless insects with bulging eyes.
Size
1/16 inch
Where you'll find it
Damp books, cardboard, new drywall, window sills, pantries and bathrooms.
Commonly confused with
Head lice do not live on paper; springtails jump, booklice do not.

Signs of booklice in your home

  • Tiny crawling specks on windowsills and paper
  • Mold or musty smell in the same area
  • Activity in new construction

Booklice questions homeowners ask

Do booklice bite people?

No — they feed on mold and mildew and are a humidity indicator, not a health threat.

Booklice control by city

Local technicians handle booklice in every market below — pick your city for neighborhood coverage, seasonal notes and a free quote.

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