Michigan State University Extension
Home Maintenance And Repair - 01500528
06/24/03
Booklice
The common booklouse (Liposcelis corrodens Heymons)
is wingless, light straw colored (almost translucent) and
only 1/25-1/12 inch (1-2mm). It looks somewhat similar to
an aphid ("plant louse") but is smaller and has chewing
instead of sucking mouthparts.
Booklice may be found in all parts of both old and
new homes, warehouses, and libraries, most often where it
is dusty, warm and damp. They are frequently found on
furniture, clothing, bedding, walls, window sills, in
kitchen cupboards, in or near books, and in old bee and
wasp nests. They also infest stored products such as
flour and ground grains. Booklice do little damage to
household goods, but their activity is an annoyance. They
feed on molds and mildews, which are probably their most
important food source, as well as fragments of dead
insects, pollen and other dead vegetable and animal
matter. They damage the paste on book bindings and
wallpaper, and may be found in stored cereals. Although
these insects are not parasitic, they can be a source of
so-called "bites" because of the dermatitis they cause to
certain sensitive individuals.
Integrated Booklice Management
For best control, dry out the infested area.
Booklice are seldom found in clean, dry, heated
buildings. Repair all leaky or sweaty pipes and install a
vapor barrier in the crawl space. Use a dehumidifier if
necessary. Vent clothes dryer outside (check vent pipe
fittings and prevent lint buildup). Store all cardboard
boxes and their contents at least 10-12 inches off the
floor. Keep window sills free of debris and remove all
old wasp and bird nests. Infested furnishings and other
moveable items should be thoroughly cleaned and aired.
Insecticides are seldom needed, but if required, a
pyrethrin can be used. Use a pyrethrin aerosol on items
such as books. However, remember that most insecticides
can stain fabrics and other porous surfaces, so use them
with caution.
For a complete listing of suggested control options
for all home, yard and garden insect pests contact your
local Extension Service, found under local government in
the phone book.
Read and follow instructions on the pesticide label.
Heed all warnings. Check with your physician if you have
any concerns regarding your personal health risk.
Revised by Tom Ellis, M.S., Department of Entomology
This information is for educational purposes only. References
to commercial products or trade names does not imply
endorsement by MSU Extension or bias against those not
mentioned. This information becomes public property upon
publication and may be printed verbatim with credit to MSU
Extension. Reprinting cannot be used to endorse or advertise
a commercial product or company.
MSU is an affirmative-action, equal-opportunity employer. Michigan State
University Extension programs and materials are open to all without regard to race,
color, national origin, gender, gender identity, religion, age, height, weight, disability,
political beliefs, sexual orientation, marital status, family status or veteran status.
Issued in furtherance of MSU Extension work, acts of May 8 and June 30, 1914, in
cooperation with the U.S. Department of Agriculture. Thomas G. Coon, Director,
MSU Extension, East Lansing,MI 48824. This information is for educational
purposes only. Reference to commercial products or trade names does not imply
endorsement by MSU Extension or bias against those not mentioned.
This file was generated from data base 02 on 02/04/08.
Data base 02 was last revised on 06/24/03.
For more information about this data base or its contents please contact
strausc@msu.edu .