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Common Wasp (Vespula vulgaris)
Nests underground and in cavities in tress and buildings.
Nests can be located by searching likely sites on fine
days for signs of wasp activity. Flight lines of foraging
wasps converging towards, or diverging away from nests
may be observed in order to pin-point the nests. |
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Solutions:
Powder treatment: an insecticidal powder can be applied
around and into the entrance of the nest. Workers are contaminated when they return to the nest and carry
the powder inside.
Surface spraying: liquid surface spray may be applied liberally and directly to
the nest or to the entrance holes of concealed nest.
Smokes:
An insecticidal smoke can be released in the cavity occupied by the nest.
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Black Ants (Lasius niger)
Workers are 3.4-5mm long, queens 15mm long. Workers are dark
brown-black, queens mid-brown; waist of only one segment.
An active insect, it nests outside in grass and walls
and under paving. It will forage widely in search of
food, which is how it comes to enter domestic premises. |
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Solutions:
Insecticide treatments can be applied in and around the nest and
should aim to ensure that a residual film of insecticide
is maintained at strategic points, for example points
of entry to buildings, such as doors, windows, ventilators,
ducts & drains. Insecticidal baits, too, can be
used around the entry points.
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Cat Fleas (Ctenocephalides felis)
Adults, 2-3.25mm long. Adult fleas live exclusively as parasites
of warm-blooded animals, especially mammals, although
birds may also be attacked. Whilst they show a certain
degree of host preference, fleas are by no means specific
and will feed on other animals in the absence of the
normal host. |
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Solutions:
Insecticides can be used to treat infested premises and protect them
from reinfestation. In addition, hosts can be treated directly.
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Dog Fleas (Ctenocephalides canis)
Adults, 2-3.25mm long. Adult fleas live exclusively as parasites
of warm-blooded animals, especially mammals, although
birds may also be attacked. Whilst they show a certain
degree of host preference, fleas are by no means specific
and will feed on other animals in the absence of the
normal host. |
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Solutions:
Insecticides can be used to treat infested premises and protect them
from reinfestation. In addition, hosts can be treated directly.
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Cockroaches:
The most common species in Northern Europe are Oriental (Blatta oreintalis) & German (Blattella germanica)
Adults, 20-24mm long. Cockroaches are common in commercial premises
associated with production or handling of food. Also in public buildings and domestic premises e.g. apartment
blocks. The germanica generally prefers warmer, humid environments, e.g. centrally heated buildings,
whilst the orientalis is frequently encountered in cooler, less humid areas such as basements and drains. |
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Solutions:
Surface sprays: Effective treatment
depends upon the selection and thorough application
of a suitable insecticide. Many insects and egg cases
are well hidden. To control an infestation the insecticide
should ideally persist until all egg cases have hatched
but continued immigration may demand routine treatments.
Space sprays: Regular treatments are necessary e.g. at
weekly intervals until infestation is brought under
control. Thereafter, maintenance treatments, at less
frequent intervals, should keep insect population at
an acceptable level.
Insecticidal baits: Baits offer the opportunity for controlled
placement of insecticides formulated in attractive food
bases. Baits offer the opportunity for continuous control
of cockroaches over extended periods.
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