Cockroaches are the scavengers of the world; they eat almost any organic matter, almost anywhere. They are also survivors, with around 3000 species. Many of which are carriers of serious diseases which affect humans.  Avoiding light, cockroaches prefer warm, dark, moist locations that are close to a food source. These can include behind refrigerators, dishwashers, drains, sewers, garbage areas, air conditioning units, kitchen cupboards and benches.  These areas bring them into contact with and also allow them to spread disease organisms such as Salmonella and organisms associated with Dysentery, Typhoid, Hepatitis and Tuberculosis.  Cockroaches are also known to produce allergic reactions in humans and in some instances, severe asthma attacks. This is from the Cockroach dust left behind which consists of moulted body parts and droppings.

Cockroach Species


American Cockroach

The adult American Cockroach is 28 to 44mm in length and is the largest of the cockroach pest species.  It has a reddish brown body, with a distinctive yellowish band behind the head.  The American Cockroach can live for up to 1.5 years, during which the female will produce about 300 – 400 eggs.  The incubation period for eggs is 6 to 8 weeks and immature cockroaches require 6 to 12 months to mature.


Australian Cockroach

The Australian Cockroach looks similar to the American cockroach, except it has yellow stripes on the outer edge of the front wings. It is a world-wide species that prefers a vegetarian diet. It is even known to eat holes in clothing and even book covers.  The female lives for up to 6 months.  With the incubation period for eggs being 40 days, an infestation can rapidly expand in ideal conditions.  Chronic household infestations usually originate from the roof void, attic or sub floor areas of the building.


Brown Banded Cockroach

The Brown Banded Cockroach looks similar to the German cockroach. but they have two lighter bands running across from one side to the other at the base of the wings and abdomen. They are 13 to 14 mm in length and have a life span of up to 4 months.  The Brown Banded cockroach are seen throughout the home.

Oriental Cockroach

The oriental cockroach prefers dark, damp and cool areas such as those under sinks and washing machines.  They are rarely found on walls, in high cupboards or on the upper floors of buildings. They are usually about 25mm in length and are very dark brown, almost black in colour. The Oriental Cockroach can enter a home in food packages, laundry or simply under the door. They feed on rubbish and other decaying organic material. If water is unavailable they can live for a month without food; however without water they die within two weeks.

German Cockroach

German Cockroaches are the most prolific cockroach because of their extremely fast breeding cycle and their ability to adapt to almost any environment.  Eating almost anything organic, German Cockroaches are found indoors, generally in areas where food and water are easily accessible, such as the kitchen and the bathroom.  German Cockroaches are also usually responsible for infestations in restaurants, cafés, hotels and other commercial premises.

Smaller than most other cockroaches, the German Cockroach is 10—15mm in length.  They are tan to medium brown in colour and have 2 parallel dark stripes on the head section.  When first emerging from the egg capsule the nymphs are very small, dark and beetle-like.  Over the period of a few weeks they become more slender and lighter coloured.  Their droppings are tiny and resemble fly-specks.  Seeing the cockroaches during the day is an indicator of a large population.

When breeding, the female carries an egg capsule around with her until just prior to hatching.  One capsule may contain anywhere between thirty and forty eggs.  As development from hatching to adult is very quick, taking as little as forty days, one female German Cockroach and her offspring can produce up to thirty thousand cockroaches in a year.  The quick breeding cycle means this can rapidly become a severe problem and can be difficult to get rid of.

cockroach comparison

Cockroach Control

Good hygiene is essential because it helps to ensure that no food is left to attract cockroaches and makes the presence of cockroaches easier to detect.

– Keep food in sealed containers
– Do not leave any food scraps exposed in the kitchen or in waste storage areas
– Thoroughly clean all benches and food preparation areas, particularly areas between the counter and appliances
– Regularly vacuum or clean possible harbourage areas and high activity areas (carpets, drapes, furniture,  kitchen and bathroom cupboards). This is to ensure you remove cockroach eggs and food deposits
– Regularly check and fix any plumbing problems, broken roof tiles etc that will collect moisture
– Remove all moisture in the sinks before going to bed
– Seal all cracks and crevices in the bathroom, pantry and kitchen cupboards



Silverfish are wingless insects with long antennae, they are approximately 1.25cm long.  They have a flat, silver scaly body which is wider at the front and narrows at the bottom.


Preferring dark damp places such as bathrooms, kitchens and ceiling cavities, Silverfish are most active at night.  Popular hiding spots include bookcases, wardrobes and doorframes.

Food Sources

Silverfish feed on products which are starchy, sweet and high in protein.  This includes things such as book bindings, cereal, clothing, gum, paste and wallpaper.


Because they are active all year around, damage to objects can occur at any time.  The most commonly seen damage is uneven holes in paper, books and flooring.  Silverfish sometimes also leave a noticeable yellow stain on material such as linen.


Changing the environment where the Silverfish are located can help control them – this can be as simple as making a room hotter or colder, or cleaning or vacuuming.  Freezing any infested objects (such as books or clothes) will kill all life stages within the object.

Cockroach and Silverfish Treatments

Sandgate Pest Control’s cockroach and silverfish treatment uses a variety of methods to ensure that any problem within your home is eradicated. We treat each part of the house thoroughly, focusing on likely breeding areas and areas where these pests commonly hide. The treatment is completely safe for people and pets, and you don’t have to leave the house while it is being carried out. For more detailed information on what we do in the treatment please contact our office on 07 3269 6198 – however among other things we always ensure that we treat in and around all cupboards and spray all accessible skirting areas / room perimeters.