Wasps
are social insects and form large colonies, or nests, which are
socially structured and highly organised. Wasps are a widespread pest
during the summer and cause fear and concern in many people because of
their powerful stings especially as some species are quite aggressive.
Their
characteristics. The queen usually spends the winter in a warm
protected site often located in lofts, attics, wall cavities or in the
ground. As many as 30,000 wasps can populate a nest. 

The treatment. The
wasps nest will be treated directly. If the wasp nest cannot be
located, treatment may involve the use of perimeter traps.
Alternatively, insect screens on doors and windows will help stop
wasps entering buildings and the installation of electric fly killers
will help to control wasps if they do get inside premises.