Nuisance and household pests-Booklouse

Order Psocodea (formerly Psocoptera)

Pest description and damage Booklice (Psocids) are brownish yellow insects about the size of a pinhead. They prefer moist, undisturbed conditions.


Eliminate entry points with caulk. Reduce moisture and increase light and air circulation. Fans and dehumidifiers are recommended. Apply labelled pesticides to cracks and crevices where appropriate.

For further information:

Booklice. Insect Advice from Extension. Pennsylvania State University.