Cockroaches: Infestation and Control
An infestation of cockroaches begins by the carrying off from the outside. Here, modern
traffic of goods plays an important role, because almost everywhere, where goods are
delivered, cockroaches reach new distribution sites. Potential transport means for cockroaches
are boxes, packages and bags as well as other containers. In Central Europe, the following
species of cockroach occur mainly: German cockroach (Blattela germanica), oriental cockroach
(Blattela orientalis), American cockroach (Periplaneta americana) and brown cockroach (Supella longipalpa).
Cockroaches prefer the darkness. They spend most of their lives protected in cavities
such as drains, inspection shafts, wall columns or the like and leave these places only
in their search for food and water. Cockroaches need four key elements to survive: heat,
shelter, food and water. The German cockroach needs higher temperatures and lives almost
exclusively inside buildings. The Oriental cockroach is also at home outdoors. While the male
cockroaches actively seek food for most days and nights, the female animals go in search of
food much less frequently. The females can survive for about 45 days without food - provided
they have access to water. Even young larvae relatively rarely go looking for food. Cockroaches
form populations where the four above-mentioned prerequisites for their survival are given.
They rarely move farther than a few yards from their peers to seek water and food unless there
is an overpopulation in their favorite places. The Oriental cockroach usually lays longer
distances in search of food than its German counterpart.
Inside buildings cockroaches use a wide network of supply ducts, cable channels and
cavities to spread. As many other species of pests, cockroaches have the natural
ambition to expand and - without any countermeasures - a building is completely infested
after a short time. Cockroaches eat everything. They eat high quality foods as well as
leftovers from the day before or waste. They can even survive in places without food where
they live on microorganisms, fatty deposits or similar materials. Cockroaches
are potential carriers of diseases and infections. With their bodies they catch bacteria,
viruses and fungal spores, which they get rid of on their paths. As nocturnal insects they
move in areas at night where we as humans demand the highest level of hygiene.
Cockroaches prefer temperatures above 20ºC or higher in their habitat. They lay their brood in egg
packets. These are worn by the dam for a certain time, supplied and then discarded. Thereafter,
the egg package matures on its own. The shell of the egg packet is coated with a chitinous
substance and therefore impermeable to liquid insecticides. The number of eggs in the egg packet
and their ripening time vary according to the type of cockroach: German cockroach: 20 - 30 eggs
per egg packet and hatching of the larvae after 4 - 6 weeks; Oriental cockroach: about 16 eggs per
eggpack and hatching of the larvae after 12 weeks; Brown cockroach: approx. 18 eggs per egg packet
and hatching of the larvae after 6 - 8 weeks.
In apartments or other kinds of buildings special attention should be paid to the potential migration
paths of cockroaches:
Drain pipes (washing machine, dishwasher, sink etc.), regarding washing machine and
dishwasher: in particular the space between pipe and hose.
All other unnecessary openings
should be sealed, for example with silicone. Ventilation shafts (such as in bathrooms):
ventilation openings should be equipped on the inside with fly screens. Possibly existing
gaps under and alongside the entrance door should be closed or covered, for example
with thermal insulation tape.
Our company practices "integrated pest control", which means gradual and targeted application of
gentle means and methods for the well-being of our customers. Among other things, we successfully
use the modern gel technology with its advantages, which means that there is no indoor air pollution
with insecticidal fumes.
Treatment against cockroaches - Cockroach extermination: