What are the four major pests? What are the 4 major pests?

The four major pests are: mosquitoes, rats, etcLocustsCockroach.

1. Mosquitoes. Mosquitoes are one of the four major pests and belong to the class Insecta.

There are about 3,000 species of Diptera mosquitoes in the world. It is a small flying insect with stinging and sucking mouthparts. Usually females feed on blood, while males suck the sap of plants. The female mosquito that usually feeds blood is dengue fever.

The intermediate host of malaria, filariasis and other pathogens poses a greater threat to people's health, and the average lifespan of mosquitoes is not long.

2. Rats. Mice are mammals.

Rodents, rodents of the rodent family, commonly known as rats.

It is a mammal.

The fastest reproducing and most survivable animals. There are about 3,000 species of rats in the world, and their tracks can be seen both indoors and in the wild, and rats can transmit diseases.

3. Locusts. Locusts are also known as grasshoppers.

It belongs to the order Orthoptera, including the species of grasshoppers, grasshoppers, and locusts, there are more than 10,000 species in the world, and more than 1,000 species in China, distributed in tropical and temperate grasslands and desert areas all over the world, and its mouthparts are hard and developed, mainly harming grasses, and is one of the agricultural pests.

4. Cockroaches. Cockroaches are the most harmful to human health because they are the source of the occurrence and spread of a variety of diseases, such as Yersinia pestis, dysentery bacillus, Escherichia coli and other more than 40 pathogens, and the secretions and excretions of cockroaches contain carcinogens.

The four major pests refer to mosquitoes, flies, rats, and cockroaches.

Mosquitoes can transmit diseases such as malaria, filariasis, dengue fever, yellow fever, etc.

Flies carry countless bacteria and viruses, and can transmit dozens of diseases.

Rats not only steal food and destroy buildings and farmland, but also spread plague, epidemic haemorrhagic fever and leptospirosis.

Cockroaches not only bite physical objects and contaminate food, but also spread diseases such as dysentery and typhoid.

Preventive measures to eliminate the four pests

Improve environmental hygiene and eliminate mosquito breeding grounds. Use screen doors, window screens, mosquito nets, mosquito coils, insecticides, insect repellents and other anti-mosquito and anti-mosquito products according to the situation to prevent mosquito bites.

Improve environmental hygiene and reduce the number of places where rats can hide. Install anti-rodent doors, anti-rodent nets, plugging holes, etc., to properly store food and reduce food contamination by rodents. Do not litter, bag household garbage, and dispose of pet feces, install screen doors, screens, fly curtains and other fly prevention facilities to cut off the invasion of flies.

Keeping the room dry and clean can reduce the breeding of cockroaches, store food tightly closed, wash dishes with hot water, keep the stove clean, and clean up kitchen waste in time.

The four major pests are mainly mosquitoes, flies, rats, and cockroaches. Among them, cockroaches rank first among the four major pests. Not only is it extremely vigorous, but it also reproduces very quickly, and it can also spread a variety of diseases and endanger human health.

Among the four pests, cockroaches are the most serious harm to human health, it has become the source of the generation and spread of a variety of diseases, cockroaches are very dirty, whether it is a toilet or a sewer, there are traces of him, it carries the most germs, it carries more than 40 kinds of pathogens such as plague bacillus, dysentery bacillus, Escherichia coli, polio fire virus and aflatoxin, and its secretions and feces also contain a variety of carcinogens.

In addition, it secretes an oily substance with a special foul odor, which leaves odors and a variety of pathogens when crawling on food, utensils and daily utensils.

Fly sanitizing and control measures:

1. Focusing on environmental management, remove the breeding ground of flies, strengthen the management of garbage and feces, and make the garbage sludge clean every day and carry out harmless treatment. Public toilets should be managed by special personnel, cleaned and flushed regularly, so that there are no maggots and no flies.

2. Use a combination of swatting and drug killing to eliminate indoor and outdoor flies, reduce their density, and spray the places where flies are active with malathion, bethion, trichlorfon, and inulin, and poison flies. At the same time, it is necessary to vigorously advocate the eradication of the first generation of adult flies in spring.

3. Cooked foods such as meals and pastries, as well as washed dishes and chopsticks and other utensils, should be stored in a gauze cabinet or covered with a gauze cover to prevent contamination by flies.

The four major pests refer to the four kinds of insects that cause greater harm to agriculture and the ecological environment, namely: locusts, cotton bollworms, rice blast bacteria and red spiders. 1.

Locusts: Locusts are large flying insects with an adult body length of about 3-8 centimeters, and when they are numerous, they form a flying locust plague. Locust plagues have caused great damage to agriculture and the ecological environment, and can swallow up large areas of vegetation, resulting in reduced crop yields and increased desertification.

Year key 2Cotton bollworm: Cotton bollworm is an insect that parasitizes cotton and begins to eat cotton leaves, stems and flowers at the larval stage, and feeds on cotton seeds in cotton fruits at the adult stage.

The large-scale reproduction and invasion of cotton bollworm will directly affect the yield and quality of cotton, and will also cause significant losses to the economic benefits of cotton planting. 3.Oryza blast fungus:

Rice blast is a disease caused by the fungus blast fungus, which mainly harms rice. The fungus can infect the leaves, stems and ears of rice, resulting in stunted growth, reduced yields and even death, posing a threat to food production and national food security. 4.

Spider mites: Spider mites are small insects that live on plants and prefer to breed in dry and hot environments. The large-scale reproduction of red spider mites will cause yellowing and wilting on plant leaves, which will seriously affect the quality and yield of crops and cause great harm to agricultural production.

Therefore, the four major pests have brought great threats to agricultural production and the ecological environment, and reasonable and effective control measures need to be taken to control these pests.

The four major pests generally refer to ants, flies, mosquitoes, and mice. Here are the details:1

Ants: Ants can destroy crops in agriculture and can also cause harm to humans, such as biting. In addition, ants can also invade homes and destroy items such as food.

2.Flies: Flies are common insects that transmit bacteria and viruses.

They live in scattered garbage heaps, sewage drains, etc., and are prone to bring all kinds of diseases when they return to the feast. 3.Mosquito:

Mosquitoes are one of the most dangerous animals in the world because they can transmit many diseases such as malaria, dengue fever, yellow fever, etc. 4.Mouse:

Rats not only damage food and furniture, but are also carriers of many diseases, such as plague, Lyme disease, etc. At the same time, rats can also pose a safety hazard to buildings or power lines.

Dear, the four major pests are mosquitoes, flies, rats, and cockroaches. These pests will have a great impact on human life, for example, mosquitoes can transmit malaria, Japanese encephalitis, filariasis, dengue Qingshanling fever, yellow fever and other diseases; Flies carry countless dormant bacteria and viruses, and there are dozens of diseases that can be transmitted, among which the common ones are: dysentery, hepatitis A, acute gastroenteritis, food poisoning, trachoma, polio, roundworm, etc.; Rats can bite power lines, destroy food and clothing, and spread plague; Cockroaches are not only extremely vigorous, but also reproduce very quickly, and can also spread a variety of diseases and endanger human health