Cockroaches are terrible enemies to humans. Interestingly, however, these cockroaches are quite fragile, and at least one species of cockroaches depends entirely on humans for their survival. Of the 5,000 cockroaches known to humans, most are the Periplaneta Americana and the Periplaneta Americana.
In human architecture, the American countryside is the largest cockroach gathering place, where cockroaches can grow to an average of 4 centimeters; it is not very common in North America, where its name is related, and it prefers a warm environment, but it also walks around – especially in large commercial buildings such as grocery stores and restaurants.
Unlike their German counterparts, American cockroaches live outdoors (when the climate is warm), and in places like Florida, they can be found everywhere in garbage cans, woods and firewood heaps. During the plum rainy season, American cockroaches migrate on a large scale and run amongst buildings. These insects can enter the room through cracks in the walls, removing decaying plants and drying their surroundings as much as possible.
American cockroach originated in Africa and was introduced across the ocean in the 17th century. It is common in underground canals, steam tunnels, sewers and basements. American cockroaches are highly productive. The American cockroach nest found in a sand well contains 5,000 members.
Generally speaking, in 10 months, a cockroach can lay 150 eggs. It lays eggs in a hard shell container near food. Sometimes it sticks the container to food with saliva.
When American cockroach eggs hatch, they undergo several stages of change, but at each stage it actively searches for food. They enjoy handy food (the food they crawl can make people sick), rotten food, and of course, panels, fruits, paper, clothes, hair and even shoes.
Because American cockroaches prefer sewers and human waste, they transmit more than 22 microorganisms (protozoa, viruses, fungi and bacteria, and of course some parasites), which can make people sick.
German cockroaches, a relative of American cockroaches, can cause great distress. Adult German cockroaches can grow to an average length of 10-15 mm.
German cockroaches, accustomed to hiding themselves, spend 75 percent of their lives in hiding. Perhaps partly because German cockroaches cannot survive without humans. If they don’t hide, they will soon be crushed. In fact, at least one study has shown that German cockroaches disappear in winter in houses without central air conditioning in the north.
German cockroaches live in larger groups, often hiding in groups in the dark of the kitchen; they are also often under walls, cabinet crevices, stoves, dishwashers and refrigerators. They find each other by smell, which of course usually comes from the shit where they live. Like its American counterparts, this kind of cockroach eats whatever they can find, but they prefer trash cans, candy, butter and meat.
Female German cockroaches carry eggs longer than American cockroaches, which drop them within 24 hours before hatching. In addition, German cockroaches lay more eggs each time than American cockroaches, which can lay 30 to 48 eggs at a time. A German cockroach can lay more than 200 eggs in its lifetime. The School of Agricultural Sciences at Pennsylvania State University says more than 10,000 cockroaches will be produced in a year…
Like American cockroaches, German cockroaches undergo several stages of growth. A bunch of German cockroaches reproduce continuously. They generally consist of 20% adults and 80% nymphs (larvae of incomplete metamorphic insects are called nymphs).
Since German cockroaches also transport pathogens, they can also cause diseases such as dysentery and food poisoning. In addition, German cockroaches’feces and exfoliated skin can allergize some people, causing asthma and rashes.
Because German cockroaches are haunted and productive, it is difficult for humans to get rid of them. Even so, preventive measures such as keeping your home clean (for example, not leaving dirty dishes overnight), keeping food in insect-proof containers and regularly cleaning garbage cans can help.
Methods of killing German cockroaches include the use of chemicals such as fluorohydrazone and fipronil, and the spraying of toxic dusts such as boric acid in corners and crevices (attention should be paid to preventing poisoning by children and pets). Surprisingly, the entomologist at Penn State University says that the sprayer is not only useless, but also makes a lot of cockroaches spread out, producing more cockroaches.