Flies, rats, mosquitoes, cockroaches
What is the first of the four evils
The first of the four evils is mosquitoes
"In addition to the four evils" of the "four evils" refers to what
Initially, flies, mosquitoes, rats and sparrows, later changed to: flies, mosquitoes, rats and bedbugs, and then later (i.e., currently) changed to: flies, mosquitoes, rats and cockroaches.
What are the four pests?
The old Four Pests were: flies, mosquitoes, rats, and sparrows (which were thought to compete with humans for food); then they were removed and replaced by bedbugs, and then by cockroaches. Therefore, the four pests should be flies, mosquitoes, rats and cockroaches. Their harmful effects are to contaminate food and the environment and to spread diseases.
What are the Four Pests? 5 points
The Four Pests have been around for a long time, and on February 12, 1958, the central government and the State Council issued a directive on the elimination of the Four Pests and the promotion of hygiene. The instructions proposed to complete the task of eliminating flies, mosquitoes, rats and sparrows in 10 years or less. Later, "sparrows" were replaced by "bedbugs", and then "bedbugs" were replaced by "cockroaches". It seems that the "Four Pests" in addition to the three stable "throne", the fourth pest with the changes in social life and produced changes. This morning, the reporter interviewed the Shanghai Municipal Center for Disease Control and Prevention, a staff member clearly told: "four pests" should be flies, mosquitoes, rats, cockroaches.
Reference:
zhidao.baidu/question/40530613What are the benefits of exterminating the four pests
WASHINGTON
WASHINGTON
These are the benefits of hygiene, disease-free, food protection (rodent extermination).
What are the original four pests?
The elimination of the four pests is to get rid of the four creatures: rats, flies, mosquitoes and cockroaches.
First, what is called the four pests?
Mice, flies, mosquitoes, cockroaches, these four creatures can be said to be harmful to human beings, so in our country is known as the "Four Pests".
Second, what are the harms of the four pests to humans?
The biggest harm to humans is the spread of disease. Cockroaches carry a variety of pathogens in and out of the body, can spread disease, viral hepatitis, various gastroenteritis and parasitic diseases.
In addition, rats consume a lot of food, bite clothes, damage forests, embankments, and bite the power lines, causing various disasters.
Third, how to kill rats?
To kill rats, you need to know the habits and activities of rats. Generally speaking, there are two ways to kill rats:
First, physical killing:
Cage (rat cage), clip (rat clip), pressure (stone pressure), buckle (metal basin buckle), flooding (water tanks over the board flooding), turn (turn over the pile of grass) and other methods of killing.
Second, drug baiting:
1, the enemy rat sodium salt: a chronic rodent poison, with a concentration of 0.05% to 0.3% made of immersion bait, adhesion bait or mixed bait use;
2, zinc phosphide: an acute rodent poison, with a concentration of 2% to 3% (on the domestic rodent) and 5% to 10% (on the wild rodent) to make the adhesion or mixing of bait use.
Fourth, how to prevent flies?
First, we must take comprehensive measures to prevent flies in order to receive satisfactory results: we must effectively do a good job of manure treatment, the use of sealed or three-cell septic tanks to prevent flies from breeding; we must do a good job of harmless disposal of garbage, to remove a variety of breeding grounds; special industries such as abattoirs, breweries, etc., to implement the fly facilities and measures; the food service industry can be used to kill flies by drug spraying, sticking traps, trapping, patting and other methods.
Second, chemical fly:
①, poison bait fly: commonly used drugs are 0.1% to 0.2% trichlorfon, or 0.1% of dichlorvos and 0.05% of fenthion, mixed into the food flies like to eat so that flies licked food poisoning.
②, stagnant spraying flies: Triclopyr, struggle na evenly sprayed in the indoor flies like to stay in the place, so that flies contact death.
③, fast fly: available 0.1% dichlorvos emulsion, 0.3% phoxim emulsion and various aerosols sold in the market on the indoor space spraying, can be fast fly.
④, kill the fly maggots: commonly used 0.5% ~ 1% trichlorfon aqueous solution, 0.1% fenitrothion, 0.2% fenthion, etc., the fly maggot breeding place spraying maggots.
V. How to prevent mosquitoes?
First, the environmental prevention: mainly including the direct removal of mosquito breeding sites and indirectly change the breeding environment, so that it is not suitable for mosquito breeding, fundamentally remove the conditions for mosquito breeding, so as to achieve the purpose of mosquitoes can not grow and reproduce. Specific measures include land leveling, filling ponds, pits, pits, ditches; turning tanks and cans to prevent stagnant water, preventing larval breeding; transforming the drainage system and municipal facilities, the use of ditches into sealed culverts, improve anti-mosquito facilities.
Second, chemical prevention and control:
①, kill adult mosquitoes: commonly used 0.5% Kaisu Dacheng 5% struggle na, diluted 50 ~ 80 times with water, sprayed on the walls of indoor mosquitoes rest ceiling, etc., so that their contact with the death of toxicity; or with the market mosquito sprays spraying to kill;
②, kill the larvae: can be used to kill the better recognized fenitroprusside, fenthion to kill young, generally 200 ~ 800 g / per. Generally 200 to 800 grams / per hectare of water, depending on the depth of water, water quality and flow adjustment. Can also use a slow-release agent to kill larvae.
Six, how to prevent cockroaches?
①, environmental control: environmental control is a fundamental measure to improve and consolidate the effect of chemical control and prevent cockroaches from invading and breeding. The main methods are to collect good food, keep the environment clean, eliminate garbage and debris, repair damaged houses and facilities, mend and block wall holes, remove breeding conditions; often check home furniture, drawers, kitchen, remove cockroaches and egg sheaths, etc.
①, environmental prevention: environmental prevention is the fundamental measure to improve and consolidate the effect of chemical prevention and prevent cockroaches from invading and breeding.
②, chemical prevention: spraying is an important method of chemical prevention of cockroaches, commonly used drugs 0.025% cypermethrin bromide gel suspension or 0.05% struggle na, etc., the use of a comprehensive and uniform spraying, barrier spraying or ?? resting on the crevices of the spot spraying; bait method: 1% acetamiprid, 3% trichlorfon, 2% dichlorvos, and other drugs and cockroaches like to eat food made of tablets, granules, pastes, water to put In addition, it can be sealed and coated with poison pen.... >>
The legendary "extermination of the four pests" is which four?
The "four evils" has a long history. February 12, 1958, *** The Central Committee, the State Council issued the basis of the four evils on the removal of hygiene instructions. The instructions proposed to eliminate flies, mosquitoes, rats and sparrows in 10 years or less. Later, "sparrows" were replaced by "bedbugs", and then "bedbugs" were replaced by "cockroaches". It seems that the "Four Pests" in addition to the three stable "throne", the fourth pest with the changes in social life and produced changes. This morning, the reporter interviewed the Shanghai Municipal Center for Disease Control and Prevention, a staff member clearly told: "four pests" should be flies, mosquitoes, rats, cockroaches.
What is what is the four evils
The four evils refer to: rats, cockroaches, mosquitoes, flies. These kinds of pests that can carry diseases are collectively known as the "Four Pests"
What do the Four Pests include 40 points
The Four Pests "Four Pests" have a long history. February 12, 1958, *** The Central Committee and the State Council issued the "Instructions on the Removal of Four Pests". WASH instructions". Proposed to complete the task of eliminating flies, mosquitoes, rats and sparrows in 10 years or less. Gradually, "sparrows" were replaced by "bedbugs". Later, due to changes in social life, "bedbugs" were replaced by "cockroaches". Therefore, today's "four pests" should be flies, mosquitoes, rats, cockroaches.
Flies are harmful to us: "Flies carry countless bacteria, viruses, can spread the disease up to dozens of kinds. Among the common ones are: dysentery, hepatitis A, acute gastroenteritis, food poisoning, trachoma, polio, roundworm, cholera, etc."
Mosquitoes are harmful to us humans in these ways: "It can transmit diseases such as malaria, encephalitis B, filariasis, dengue fever, yellow fever, etc."
Rats can do this to humans: "Steal food, spread diseases, and also destroy the environment of farmland."
Cockroaches, of course, are also harmful to us: "Bite rotten food, damage raw materials, contaminate food, and spread dysentery, typhoid, polio, adenovirus, viral hepatitis and other diseases. In addition, it can also make food mold to produce carcinogenic aflatoxin."
Flies in the late 70s statistics, the world has more than 120,000 species of insects in 132 families of Diptera, of which there are 64 families of flies more than 34,000 species. In Fuzhou City, there are 74 species in 4 families and 38 genera. The main fly species are house flies (right), city flies, silky green flies, and big-headed golden flies.
Flies have the physiological characteristics of a mating can be lifelong egg laying, a female fly can lay eggs 5-6 times in her life, each time the number of eggs about 100-150, up to about 300. A female fly can lay eggs 5-6 times in her life, and each time she lays about 100-150 eggs, the most can be up to about 300 eggs. The fly is an active insect in the daytime, with obvious phototropism. At night, it is stationary and inhabits. Activity, habitat, depending on the fly species, season, temperature and geographical area. During certain seasons, stable rot flies, summer sidewall flies, and city flies can also invade homes. The big head golden fly, silky green fly, lilium fly, ambrosia fly, and hemp fly, on the other hand, are mainly active and inhabiting outdoors.
? The fly's activity is greatly affected by temperature. It can only crawl at 4 to 7 ℃, 10 to 15 ℃ can fly, 20 ℃ or more to feed, mating, egg laying, 30 to 35 ℃ is particularly active, 35 to 40 ℃ due to overheating and stop activities, 45 to 47 ℃ when the death.
? Flies are good at flying. Flight speed up to 6-8 kilometers per hour, the highest flight 8-18 kilometers per day and night. But usually more in the breeding ground radius of 100 to 200 meters within the scope of activities, most do not exceed 1 to 2 kilometers.
? The fly's overwintering mode is quite complex. Can overwinter as a pupa, but also as a fly maggot, adult overwintering. In the northern frigid and temperate regions, the natural world can not see the active state of the housefly, but in the artificial heating indoor fly activity, vegetable greenhouse greenhouse often become the following year when the spring warming flies breed a lot of the birthplace. In Jiangnan and part of the arc of China, the average winter temperature is below 0 ℃, the fly can skillfully overwinter in pupal state, a few areas can also be found in the dormant female flies covered with animal feces fly maggots. In the subtropical region of South China, the average temperature is above 5 ℃, flies do not exist in a dormant state, can continue to breed and reproduce.
[edit]Mosquitoes
The average lifespan of mosquitoes is not long, 3-100 days for females and 10-20 days for males.
Mosquitoes are male and female, with male mosquitoes having filiform antennae and generally denser antennal hairs than females. They feed on nectar and plant sap. Female mosquitoes need to bite animals in order to suck blood to promote the maturation of the internal eggs.
There is a substance in mosquito saliva that has a vasodilating and anticoagulant effect, which makes it easier for the blood to flow to the bite. The substance in the mosquito's saliva causes the skin of the bitten person to appear puckered and itchy.
Mosquitoes suck about five thousandths of a milliliter of blood per bite, and after each meal, mosquitoes are usually active within 2 kilometers of their birthplace, although they can travel up to 180 kilometers.
The total number of eggs laid by each female mosquito in her lifetime is about 1,000-3,000, and they are usually laid on the surface of the water and hatch into aquatic larvae - tsetse - two days later. The tsetse feed on algae in the water, and they undergo four epithelializations before growing into a pupa that floats on the surface of the water, and eventually the pupal epidermis breaks and the young mosquito is born.
The life history of mosquitoes consists of 4 parts: eggs, larvae, pupae, and adults. Generally, the eggs are 1-2 days old, the larval stage is 5-7 days old, the pupae is 2-3 days old, and the adults are 3-7 days old from feathering to blood-sucking and egg-laying, and the whole generation is about 1-2 weeks old.
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