What pests are there?

Flies, cockroaches, mosquitoes, fleas, ants, body lice, head lice, crabs, aphids, locusts, thrips, scale insects, psyllids, leafhoppers, brown planthoppers, diamondback mot

Flies, cockroaches, mosquitoes, fleas, ants, body lice, head lice, crabs, aphids, locusts, thrips, scale insects, psyllids, leafhoppers, brown planthoppers, diamondback moths, corn borers, prodenia litura, fruit flies, rice weevils, termites and clotheslines are common pests in life.

Pests are harmful insects, which are the general name of insects harmful to human beings. Mainly divided into insects and non-insects, there are many kinds and quantities.

First of all, flies

Flies are completely abnormal insects, and their eating habits are very complicated. They belong to omnivorous flies, which can feed on various substances, such as human and livestock secretions and excretions, human food, kitchen waste and other garbage, plant juice and so on. Houseflies can excrete feces in a short time (a few minutes) after they are full. Because of frequent vomiting and defecation, they lose more water, which makes them eat frequently, so flies are multiplying.

Second, cockroaches

Cockroaches belong to Arthropoda, Insecta, and are common medical insects. Cockroaches can be artificially infected with bacteria that cause diseases such as cholera, diphtheria, pneumonia, gangrene, anthrax, tuberculosis, etc. They can carry a variety of eggs such as hookworm, ascaris, beef tapeworm, whipworm, and can also be used as hymenolepis, Echinococcus moniliforme, whipworm, etc.

Third, mosquitoes.

Mosquitoes are the most important medical insect groups, and their main harm is to spread diseases. Mosquitoes become contagious after biting the blood of people or animals with certain viruses for a long time. When they bite people who have no immunity, they will make the bitten people sick. Mosquitoes that can spread diseases in China can be roughly divided into three categories: one is called Anopheles, commonly known as Anopheles, which mainly spreads malaria; The other is Culex pipiens, which mainly spreads filariasis and Japanese encephalitis; The third category is Aedes mosquitoes, which mainly spread Japanese encephalitis and dengue fever.

Fourth, fleas

Fleas belong to the complete metamorphosis of Lepidoptera. Fleas are important vectors, which can spread many important infectious diseases, including plague, tapeworm, hemorrhagic fever with renal syndrome, endemic typhus and Bartonella disease. Both sexes of fleas have blood-sucking habits. People who are bitten often cause allergic reactions in local tissues, resulting in papules of different sizes. Those with severe reaction feel itchy and can also cause iron deficiency anemia.

Five, ants

Ants belong to Arthropoda, Insecta, Hymenoptera and Formicidae. The harm of different ants has its own characteristics. Queen ants usually live in nests and are responsible for reproducing. The main harm is that worker ants leave their nests for food, which mainly spreads germs, bites people, pollutes the environment and destroys buildings. The losses are mainly manifested in two aspects: first, the indirect losses caused by the spread of various diseases endangering human health; The second is the direct economic loss caused by food damage and pollution.

Six, body lice

Body louse is a kind of lice, mainly in human body, parasitic in hair follicles, feeding on blood, and rarely occurs under good sanitary conditions. Body lice first parasitize the seams of clothes and then reach the skin. Sometimes, scorpions appear on body hair or cloth. Injuries are common in shoulders, buttocks and abdomen. Itching is persistent. Upon examination, red spots caused by bites can be seen, often accompanied by linear scratches and occasionally furuncle, which can cause urticaria or superficial bacterial infection.

Seven, head lice

Head lice are small gray wingless insects, which are infected by touching patients' combs, heads, hats, hairpins, headscarves and so on. The complication is that the scalp will itch, and the students will scratch involuntarily, and then the skin of the head will be damaged, and bacterial infection will cause complications of lymphadenitis. Turn your hair from the back of your neck to the front of your hair. If there is a small white spot, flick it with your hand. If it can't bounce off, pull out the white spot and press it with your nails. If water flows out or sounds are heard, it is a louse egg.

Eight, crabs

The pubic louse is a parasite on human hair, and it is called pubic louse because it is common in genitals. . Its body is wider than the head lice, and its feet are wider, so it can climb among the messy hair. Besides pubic hair, crabs can also be parasitic on eyelashes, hair, beard and armpit hair. Crabs feed on human blood, so the affected area where crabs live will feel itchy from time to time.

Nine, aphids

Aphids are herbivorous insects, including all members of Aphidoidea, and are one of the most destructive pests on the earth. Damage mainly includes two aspects: direct damage and indirect damage. The direct damage is mainly caused by adult aphids and young aphids sucking the juice of leaves, stems, tender heads and young ears. Indirect harm refers to the spread of wheat virus diseases through wheat aphids, among which wheat yellow dwarf disease is the most harmful.

Ten, locusts

Locust commonly known as? Grasshopper? Locusta migratoria manilensis is the most widely distributed in China, and its damage is the most serious. It is the most important species of migratory locusts in China, which mainly harms Gramineae plants and is an agricultural pest. Locust is an important part of the ecosystem of agriculture, forestry and animal husbandry, and many harmful locust species can cause different degrees of harm to agriculture, forestry and animal husbandry. There are about 300 species of locusts that can harm agriculture, forestry and animal husbandry, except Antarctica and Eurasia, where the latitude is 55? Locusts can occur outside the northern region.

Eleven, thrips

Thrips are the general name of Thysanoptera of Insecta, which feed on plant juice or fungi. Thrips suck the sap of young tissues (branches, leaves, flowers, fruits, etc.). ) The plants are adults and nymphs, the young leaves and shoots become hard, curly and withered, the plants grow slowly and the internodes are shortened. Tobacco thrips can spread tomato spot wilt virus TSWV, which seriously harms cash crops such as lettuce, pineapple, tomato, tobacco and potato.

Twelve, scale insects

Scale insects are an important pest on citrus and grapefruit. The common insects are scale insects, scale insects, scale insects, scale insects, scale insects and scale insects. After the sap began to flow in early spring, scale insects began to feed and larvae crawled on ornamental plants. After finding a suitable place, they put their mouthparts into the flowers and trees, suck the juice and start a fixed life, which makes the host plants lose nutrition and lose a lot of water. After the bud tip is damaged, the poor growth often leads to yellowing and withering, and the leaves often appear yellow spots, which will fall off early in the future.

Thirteen, psyllid

Psyllid is an important group of Homoptera of Insecta. It feeds on the phloem of plants, and the efficiency of growth and development is restricted by the nutritional status of plants, especially the content of amino acids in phloem juice. The harm of feeding is due to the influence of injecting toxic substances into saliva. Citrus Huanglongbing is spread through the saliva of citrus psyllid, and some plants cause various molds such as China pear psyllid due to the harm of psyllid.

Fourteen cicada

Cicada is an insect that harms grains, vegetables, fruit trees and trees. This insect not only harms crops, but also spreads plant virus diseases. Apple leafhoppers make apple leaves white with white spots. Adults are green and white and live exclusively on apple trees or wild roses. It is a grape leafhopper, and its adult body is slender, yellow, with erythema, about 3 mm long. It feeds on developing leaves, overwinters among fallen leaves, and lives in grapes, Parthenocissus quinquefolia and apple trees.

Fifteen, brown planthopper

Brown planthopper, a Hemiptera insect, has the habit of long-distance migration and is the main pest on rice in China and many Asian countries. It is a single-feeding pest, which can only feed and reproduce on rice and common wild rice. The harm to rice is mainly manifested in spawning, direct smoking, spreading or inducing rice diseases.

Sixteen, Plutella xylostella

Plutella xylostella is a worldwide migratory pest, which mainly harms cruciferous plants such as broccoli, water shield, cabbage, purple cabbage, Chinese cabbage, rape, mustard, cauliflower and radish. The first instar larvae only feed on mesophyll, leaving the epidermis and forming transparent spots on vegetable leaves. Open the skylight? 3-4-year-old larvae can eat leaves into holes and nicks. In severe cases, the whole leaf is eaten into a net. At seedling stage, the central leaf is often damaged, which affects the core and hurts the tender stems, young pods and grains on the reserved plants.

Seventeen, corn borer

Corn borer belongs to LEPIDOPTERA, which mainly harms corn, sorghum and millet. It can also harm crops such as cotton, sugarcane, rice, beet, hemp, sunflower, sugarcane and beans, and is a worldwide pest. It is mainly caused by larvae eating stems, destroying stem tissues, affecting nutrient transportation and damaging plants. In severe cases, the stem will be broken by the wind.

Eighteen, Spodoptera litura

Spodoptera litura is a kind of LEPIDOPTERA, Noctuidae and Spodoptera, and it is a crop pest. Among vegetables, mustard, potato, Chinese cabbage, cabbage, pepper, pumpkin, eggplant, tomato, towel gourd, wax gourd, Chenopodiaceae, Liliaceae and other crops can all suffer. Larvae mainly harms the whole plant and feeds on the back of leaves when it is young. Its eating habits are mixed, and it will harm various organs. When you get old, you will become overeating, which is a very harmful pest.

Nineteen, apple moth

The codling moth is an omnivorous borer, belonging to Lepidoptera and Lepidoptera. With strong adaptability, strong resistance and strong reproductive ability, it is a pest that has a great influence on fruit production in the world. This insect eats fruits with larvae, such as apples, pears and apricots, causing a lot of damage to the fruits and causing the fruits to fall off and rot before maturity. The fruit eating rate is generally above 50%, and it can reach 70%- 100% in serious cases.

Twenty, oriental fruit fly

The larvae of oriental fruit fly feed on the fruit, which often causes the fruit to fall off before it is mature, which seriously affects the yield and quality. After the larvae of Bactrocera dorsalis are damaged, the fruit may fall off or lose its economic value. Areas with serious pests will lead to crop failure or more than 80% crop yield loss. Adults lay eggs in the host fruit, and larvae develop by feeding on the pulp in the fruit. When the larvae mature, they come out of the fruit, pupate in the soil, and the adults emerge in the soil.

Twenty-one, rice elephant

Rice weevil is the main pest of stored grain, which harms rice, rice, wheat, corn, sorghum and so on. Adults bite the grain and larvae eat the inside of the grain. This is a completely deformed insect. Because of its rapid growth and reproduction and great harm, its geographical distribution can be spread all over the world. In China, it is mainly distributed in the south. In recent years, the harm of rice weevil is more serious.

Twenty-two, termites

Termite is a semi-metamorphosed completely social insect, and it is one of the insects that can degrade lignocellulose efficiently in the natural environment. Termites can eat all kinds of field crops, trees, cash crops, fruit trees and seedlings. The harm of black-winged soil termites to river dams is more serious, and termites will cause huge losses to houses, storage materials, buried plastic cables and so on.

Twenty-three, clothing fish

Carpet is a primitive wingless insect, which belongs to Kanik. Its breeding places are bookcases, bookshelves, book bundles, floor seams, and gaps between old books, and can spread with the removal of utensils. During the transportation of bookcases, bookshelves and book boxes, adults, larvae and eggs can spread to other places and migrate voluntarily because of unfavorable climate or habitat.