Pest Control
Psocids (Booklice)
From time to time people find that their food cupboards have
become infested with tiny grey or brown insects. These are often
found on the packaging of dry goods such as flour, milk powder,
sugar or semolina. It is natural, but often incorrect, to assume
that the products themselves are always at fault. Our aim is to
explain what these insects are and how best to prevent them.
What are Psocids?
Psocids or booklice are common but harmless insects between 1
and 2 mm long, which survive in dry powdery foods. They prefer to
live in dark, warm, humid places such as the folds in packaging in
food cupboards, and dislike light or disturbance. They feed on a
wide variety of dry food products such as flour and also the
microscopic moulds that develop in humid conditions. They may live
for over six months during which time the female may lay up to 100
eggs. Research has shown that the sort of psocids (there are
several different species) which cause problems in homes are rarely
found where food id produced.
What Causes Them?
They prefer areas with high humidity but can tolerate dry
conditions for some days. The kitchen is likely to provide the
conditions they need and fitted cupboards provide the darkness
which attracts them. Some food products, including flour, naturally
contain moisture. Moisture in the home can be caused by not having
enough ventilation in the kitchen or bathroom. In warm conditions
they can rapidly increase in number. This is most likely to occur
during the summer months when temperatures are higher, leading to
their discovery in the autumn.
Prevention and Cure
It is best to keep all dry foods in cool larders or cupboards
with ventilation. If this is not possible make sure that your
cupboards are always free from condensation and damp. If you notice
that condensation occurs in your kitchen, particularly during
cooking or washing, open your windows. If the problem is continual
it may be necessary to take additional precautions. Advice on
preventing condensation may be sought from the Private Sector
Housing Team. If you discover any insects, do not use an
insecticide because of the danger of contaminating your food. The
best method of getting rid of them is to remove and dispose of all
the affected food. Clean the cupboard by using a DRY
cloth, or by vacuuming. Empty the contents into an
external dustbin. Make sure the cupboard is completely dry before
replacing any foods. This may be achieved by using a warm air
blower like a hair dryer.
REMEMBER
Prevention is always better than cure.
Store dry foods in a cool dry place.
Contact Customer Services
Team Telephone: 01304 872428
E-mail: customerservices@dover.gov.uk
