GERMAN COCKROACH
Blattella germanica (Linnaeus)
The German cockroach is the most commonly encountered of the
house infesting species in the United States, This insect is the
most economically important urban pest, it is also generally the
most persistent and difficult to manage. The reasons for this are
somewhat complex, but an understanding of some of the factors
involved is basic to the practice of pest management. First, the
German cockroach has a larger number of eggs per capsule than the
other species that infest structures.
Second, it also has the shortest period to develop from
hatching until sexual maturity; thus, populations of German
cockroaches will build up faster than other species. Third,
German cockroach nymphs have a better chance of surviving than do
other species because the female carries the egg capsule during
the entire time that the embryos are developing within the eggs.
This results in the nymphs avoiding many hazards of the
environment which may affect eggs that remain detached and
isolated. Fourth, German cockroach nymphs are smaller than most
other cockroaches; thus, they are able to conceal themselves in
many places which are inaccessible to individuals of the larger
species.
These biological factors, combined with its very adaptive
feeding habits and other behaviors, give the German cockroach
advantages toward increased chances for survival and persistently
maintaining high populations.
The German cockroach is a general feeder, but is particularly
attracted to fermented foods and beverage residues (e.g., beer
spills). If water is present, adults can live about a month
without food, but young nymphs will die of starvation within 10
days. Without food or water, the adults die in less than two
weeks. Most stages become very stressed if deprived of food or
water for more than a couple of days. Stressed cockroaches tend
to wander or forage for resources aggressively, even during
abnormal periods such as the daytime.
Infestations are sometimes found in areas not generally
suspected of German cockroaches; for example, dresser drawers in
bedrooms. When German cockroaches are found scattered through
non-food areas of a home or building, it is usually caused by a
very heavy infestation or by the repellent effects of insecticide
applications. Cockroaches in these areas will find food scarce,
but can feed on scattered crumbs, soiled clothing, the glue on
dresser drawers or on some cosmetic products. German cockroaches
can also be found outdoors during warm months, often associated
with garbage receptacles. This, too, is usually due to a heavy
infestation indoors. |
Cockroach Control Tips
Roaches can't help the fact that to most humans, they are
unwanted company. It's funny, though, how these pesky insects can
often make a grown man or woman scream, tremble and run for cover
faster than you can say, Basically, there are 5 species of
roaches that are common in the Western Hemisphere. It is
interesting to note that each of these cockroaches has its own
distinct habits and traits, each cockroach behaves differently.
Therefore each must be treated differently.
German cockroach (the number 1 roach in the USA) is an indoor
roach. Sometimes they are called kitchen roaches or grocery store
roaches because they live in kitchens and bathrooms and infest
cabinets. Most of the time they are brought in through goods from
the grocery store.
Brown Banded Roaches are also an indoor roach. They are common
to closets where you will find small clusters of eggs glued to
the ceiling or to the walls. For these two roaches you must treat
indoors, especially cabinets and closets.
Smoky Brown, American and Oriental roaches can grow up to 2 or
more inches in length and are commonly called water roaches,
waterbugs, palmetto bugs, etc..These roaches live outdoors and
treatment outdoors and especially under pier and beam homes (one
of their favorite hiding places) will help to keep them away.
Here are some simple steps that will help control any
cockroach infestation:
Cut down on their food supply.
- Vacuum or sweep the floor after every meal.
- Wash dishes in soapy, hot water to eliminate all traces of grease.
- Keep trash in a tight-lidded container.
- Keep compost as far from the house as possible. Cover each new "deposit" with a fresh layer of sand or soil.
- Store unused portions of chips, cereal, cookies etc. in tightly sealed plastic containers or large glass jars with screw-on lids.
- After a pet has eaten, remove their food bowl and sweep the floor.
- Don't walk through the house eating: contain crumbs in one room.
- Don't forget to clean crumbs from under appliances daily.
Make it hard for them to hide.
- Move woodpiles away from outside walls.
- Take your recycling out promptly; avoid letting old food cans, stacks of newspapers or magazines pile up.
- Use boric acid or Drione Dust and put it into the nooks and crannies where roaches hide. WARNING: BORIC ACID, WHILE SAFER THAN MANY PESTICIDES, IS NOT SAFE FOR PETS OR HUMANS TO BREATHE, EAT OR HAVE ON SKIN.
Put the boric acid in a clean, dry duster. Using a flashlight, inspect cracks in areas where you have spied roaches. Remember to
check cracks between walls and floors, behind sinks and under appliances.Where you can see them hiding, puff the boric acid into the cracks.
Dry Up Their Water Supply
Like humans, roaches can go much longer without food than without water. To keep roaches away, keep them thirsty.
- Fix dripping faucets.
- Pour some Lysol into toilets at night to make the water undrinkable.
- Don't over water house plants. Soggy soil is a delicious cockroach cocktail.
Keep Them Out!
- To prevent roaches from migrating from your neighbor's place to yours, seal up common roach entry ways.
- Fill holes where pipes disappear into walls with steel wool or caulk.
- Pour a little Lysol down your drains nightly to discourage roaches from crawling up into your sinks.
- Keep sink plugs over drains.
|
AMERICAN COCKROACH
Periplaneta americana (Linnaeus)
The American cockroach is also known as the water bug, flying
water bug and, in some areas of the South, the palmetto bug. It
is the largest of the common species, growing to 1.5 inches or
more in length. Both the male and female are fully winged.
The female drops her egg capsule within a day after
it is formed, egg capsules are formed at the rate of about one
per week until from 15 to 90 capsules have been produced. Each
capsule contains 14-16 eggs. At room temperature, nymphs will
hatch out in 50-55 days. Young nymphs are grayish-brown and each
will molt 9-13 times before reaching maturity.
The time required to complete the nymphal stage varies from
160-971 days. Under ideal conditions, an adult female can live up
to 14-15 months; males for a somewhat shorter period.
When indoors, the nymphs and adults are usually found in dark,
moist areas of basements and crawl spaces as well as in and
around bathtubs, clothes hampers, floor drains, pipe chases and
sewers.
The American cockroach is also common around the manholes of
sewers, and on the underside of metal covers of large sump pumps
in boiler rooms. American cockroaches have also been observed
migrating from one building to another during warm months in the
North.
In the South, this roach is abundant in alley ways, yards,
hollow trees and palm trees. Recent studies in Florida have shown
that American cockroaches and other outdoor roaches are generally
associated with trees and woodpiles in landscapes. Similar
studies in Texas have shown that American and smoky-brown
cockroaches often prefer moist, shady areas of ground cover,
which are often found around foundations and near swimming
pools.
American cockroaches feed on a variety of foods, but decaying
organic matter seems to be preferred. They also feed upon book
bindings, manuscripts, clothing and glossy paper with starch
sizing. Syrup and other sweets are also attractive. The adults
can survive two or three months without food, but only about a
month without water.
|
American Cockroach Management
As with German cockroach management, it is important to do a
thorough inspection. A trap survey may be necessary in difficult
or special situations before any management procedures are
attempted. This includes infestations which are originating in
the landscape outdoors.
In the South, American cockroaches are commonly found in the
landscape along with other larger species, and can readily move
inside during nighttime foraging. Movement indoors often
increases during periods of cold, extreme hot and dry weather, or
excessive rainfall. In these cases, it is important to treat all
outdoor areas where the cockroach populations are focused.
Perimeter or "barrier" treatments using residual insecticide
formulations to prevent cockroach entry into buildings are
helpful. Identify where the cockroaches are harboring and moving
around in the landscape, and focus insecticide applications in
those areas. Exclusion techniques such as caulking or sealing
various cockroach entry points are effective at reducing the
problem indoors. To prevent cockroaches from entering through
weep holes in exterior brick facade, insert small squares of
window screening into the holes using a putty knife.. Excessive
and widespread insecticide applications in the landscape are not
usually necessary.
American cockroaches can be controlled by the use of sprays,
dusts or baits. Residual insecticide sprays applied into infested
areas will control American roaches slowly, but effectively. Be
sure to treat around floor drains where American cockroaches are
harboring, and try to use window screening or some other method
to physically prevent them from entering the building from these
sources, at Nature King Pest Management, we specialize in total
pest elimination, our procedures to treat roach infestation have
been effective for many years, call our office for a free
estimate and take advantage of our season specials.
For more information, contact us.
|