Agriculture Reference
In-Depth Information
exposed or fl ying insects, and relatively
poor at contacting concealed insects. Space
treatments are almost entirely based on
pyrethroids, often in a mixture with a
synergist. Space insecticides may be applied
by a number of different systems, such as a
pressurized aerosol can, a pyrotechnic
insecticide product or an electrically
powered ultra low volume (ULV) generator.
In general, space treatment, despite its
potential speed of use, is not seen as an
effective bed bug treatment. Its limited
effi cacy arises from the poor ability of the
droplets to penetrate concealed bed bug
harbourages and the reliance on pyrethroids
to which there is widespread resistance.
None the less, some pest control organ-
izations apply a space treatment immedi-
ately after having applied a residual
insecticide treatment because they consider
that it improves overall activity by fl ushing
insects out onto the wet insecticide deposit.
Insecticide residual sprays
Use of residual insecticide sprays has been
the main technique used to control bed
bugs since the introduction of synthetic
insecticides in the mid-20th century (Fig.
2.3). Despite the recent appearance of
Fig. 2.3.
Pest control technician spraying residual insecticide for bed bug control. Note the technician's
personal protective equipment, the resident's clothing bagged ready for laundry and the textile base of
the bed frame has been removed.
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