In all corners of our planet, since ancient times, people have been fighting insects that harm humans and their economy, which have a negative impact on the surrounding nature.
In relation to humans, the class of insects is conventionally divided into three groups: harmful, indifferent and useful. But often the harm or benefit of many insects depends on the season and all kinds of conditions. For example, mosquitoes, annoying for people, provide an invaluable service to the inhabitants of ponds and lakes: the larvae of these insects are an important source of food for fish.
Harm to humans and animals
Among the huge number of insects, there are many that cause serious harm to humans and animals. Blood-sucking insects that can carry pathogens of a wide variety of diseases can be very dangerous. An ordinary fly that has flown into human housing can bring on its paws such dangerous diseases as dysentery, cholera, typhoid fever or ascaris eggs. The well-known tsetse fly is a serious enemy for those living in the tropics of the African continent: for humans, its bite is not fatal, but almost all pets die from it quickly enough.
Numerous mosquitoes bring a lot of trouble to humans, but the most dangerous among them are malaria. Dragonflies and insectivorous birds help people to fight mosquitoes.
On the banks of rivers and in the savannas of South America, there are mosquitoes, the bites of which entail cruel torment of people and animals. The mosquito bite resembles a drop of boiling oil falling on the skin, the victims of the mosquitoes become completely unrecognizable. With a large accumulation, these insects penetrate the ears, nose, mouth, eyes.
Lice and fleas are parasites that also carry dangerous diseases (typhoid and plague). Parasitic lice are usually found in cows, pigs, and fleas - in dogs, birds, and rats.
Livestock farming often suffers from horseflies and gadflies: a large number of these flying insects in pastures do not allow domestic animals to eat normally, and is the reason for a decrease in milk yield. In addition, the larvae of some gadflies can penetrate the internal organs and subsequently cause the appearance of purulent nodules.
"Domestic" parasitic insects
Few people find it pleasant to live "next door" to parasites. The owners often have to deal with cockroaches, bedbugs, fleas, house ants.
Red cockroaches bring big problems to a person. Prusaks are not easy to get rid of as they are very prolific. The danger of these insects is that cockroaches are capable of carrying pathogens of dangerous diseases. Compliance with basic sanitary standards in the apartment will help, along with the necessary processing, to get rid of these unpleasant "neighbors".
Food for bed bugs is human blood, so they appear at night and find a "victim" from a distant distance by smell. During the day, bugs hide in cracks, behind wallpaper, ceiling and curtains. In addition to the troubles of bites, bedbugs are dangerous for humans as carriers of infection, so it is important for them to declare "war" immediately, perhaps even throwing away furniture or inviting specialists.
Fleas usually come from pets. Dangerous to humans as carriers of viruses and microbes. Disinfection of animal rugs, regularly maintained cleanliness will get rid of the presence of these insects.
Many other representatives of insects can also live in a person's dwelling, including: domestic ants, moths, wood lice, various bugs. All of them also cause trouble for people, pets and plants.
