Certain species of cockroaches have co-inhabited with humans in many areas such as homes, ships, food production & storage facilities. These common household cockroaches were introduced into Australia over the last 200 years and are the most commonly encountered household pests in Australia.
"Most [cockroach] species like warm, humid places," Dr Tanya Latty, an entomologist at the School of Life and Environmental Sciences at the University of Sydney, said. "They need the moisture so a place like Sydney is cockroach heaven."
There are around 4,000 species of cockroaches worldwide and about 450 species in Australia, but very few are pests. The three main types of cockroaches commonly found in homes and businesses in Australia include the German cockroach, Australian cockroach and American cockroach.
Australian cockroaches can carry Salmonella and other germs. You certainly do not want these insects to love your cooking and to colonize your home. They can also damage plants when cool temperatures force them into a confined space such as a nursery.
Smells that roaches hate: a quickfire summary
Oregano, rosemary, mint, eucalyptus, lemongrass and catnip are great herby options. Citrus oils work brilliantly too.
The best way to keep cockroaches away permanently is to make the home less inviting. Make sure to keep the home clean, clean up food messes, take out trash at the end of the day, seal any cracks or gaps around windows, doors and the foundation, and fix any issue that might lead to high moisture content within the home.
Cockroaches only approach humans when they are not awake. They are usually timid creatures that avoid humans as much as possible.
Unfortunately, cockroaches are not loners. If you see one, there are likely many more that you can't see. Cockroaches are nocturnal creatures, so you'll most likely spot them late at night, especially if you walk into your kitchen and turn on the light.
The Australian cockroach drops the ootheca in sheltered areas of your home, close to food sources. The female hides the egg casings in holes and tight crevices.
Roach Repellents
Peppermint oil, cedarwood oil, and cypress oil are essential oils that effectively keep cockroaches at bay. Additionally, these insects hate the smell of crushed bay leaves and steer clear of coffee grounds. If you want to try a natural way to kill them, combine powdered sugar and boric acid.
Considered a large insect, some cockroaches, such as the Australian giant burrowing cockroach, can reach 3.5 inches in length. Despite their prominence and abundance, they have a large variety of predators, ranging from small beetles and centipedes to large birds and snakes.
Physically Seeing a Roach
You may be wondering: "I saw one cockroach, should I be worried?" If you spot even one roach during the daytime, it can mean the infestation has been going on for some time or that it has progressed to the point where drastic action must be taken immediately.
The largest cockroach farm is near Xichang, Sichuan, southwestern China, where it breeds six billion cockroaches a year.
China. China remains one of the highest consumers of exotic foods in the world, and cockroaches are no exception. China is the number one consumer of cockroaches on the planet.
The giant burrowing cockroach (Macropanesthia rhinoceros) is also known as the rhinoceros cockroach, and Queensland giant cockroach. These cockroaches are native to Australia and mostly found in tropical and subtropical parts of Queensland.
Number Of Roaches In An Infestation. You might be seeing two to ten cockroaches in a day. But if it exceeds ten, you should start worrying. This may be an indication that you're not only having a cockroach problem but an infestation.
You don't have to call an exterminator immediately, but take proactive steps to diagnose the scale of the issue: search for possible hiding areas and look for any signs of infestation (roach droppings, eggs, skin casks). Once you see 2 roaches, you have an infestation—contact an exterminator as soon as possible.
Borax is a readily-available laundry product that's excellent for killing roaches. For best results, combine equal parts borax and white table sugar. Dust the mixture any place you've seen roach activity. When the roaches consume the borax, it will dehydrate them and kill them rapidly.
Cockroaches in food can cause second-hand poisoning
If you consume this poison second-hand through a cockroach, you could be in danger. The more so if you consume the entire pest by accident. Keep an eye out for poisoning symptoms such as dizziness, confusion, lack of concentration, and stomach pain.
Because of this, cockroaches will not bite active humans, but sleeping humans is another matter. Cockroaches emerge from their indoor hiding spots at night to seek out food, and while doing so, they sometimes crawl over sleeping humans.
Cockroach Eliminating Method: Baking Soda and Sugar
The method: Mix equal parts baking soda and sugar in a shallow bowl and place near the site of your last cockroach sighting. The idea is that the sugar attracts the cockroaches and the baking soda will kill them.
It's a fact that cockroaches are afraid of humans and other mammals or animals that are bigger than them. They see us as predators and that fear triggers their instinct to scatter away. However, they dislike strong and distinctive scents such as citrus, peppermint, lavender and vinegar.
Dusts – A few insecticides used for cockroach control are applied as dusts or powders. Most familiar to householders are boric acid and diatomaceous earth. For controlling cockroaches, boric acid tends to be more effective. Roaches succumb to boric acid after crawling over treated surfaces.
Thus, sleeping with the light on can keep cockroaches away from your bedroom. When you leave your lights on, the cockroaches will not even try to come out. Predators are also attracted by the light and will begin to actively hunt down the cockroaches when it's bright in the room.