An 800-word scientific paper is urgent.

Two scientific papers, "Why don't ants get lost" and "Snails are animals with the most teeth in the world"

Because ants rely on smell to prevent getting lost.

As long as you obey the "60-degree rule", ants will never miss their way home. Recently, British scientists found that ants can effectively "apply" and "geometric informatics" to find their way. The research results were published in the latest issue of Nature.

Social ants often go out alone in search of food, sometimes walking a long way. It is not a simple thing to return to the nest from far away. But little ants have an excellent set of skills to find their way. Even if there are dense clouds or the ground is destroyed, they will still find their nests, but they have taken some detours.

Why ants can find their way home accurately, like a mystery, has long attracted the interest of zoologists. In the process of exploration, the researchers found an effective way for ants to identify the direction. For example, using extraordinary memory and olfactory information.

However, the latest research findings are unexpected-ants can effectively "apply" geometric informatics to find their way. This feature of ants was discovered by British scientists, and related research results were published in the latest issue of Nature.

The results show that when ants go out for food or go home, they usually release a special pheromone smell to mark their tracks-when the route turns at a certain angle, they will release this small amount of special smell as a road sign, and the crossing angle of the mark will also indicate whether there is food source or just an ordinary fork in the road.

In the article, the researcher said that in the process of studying the activities of ants in the wild, the researchers found that when the reconnaissance ants in charge of reconnaissance tasks set out from their nests, they would use a pheromone with a special smell to mark their tracks comprehensively, and the workers who came out of the hole would continue to travel to their destinations with food according to the instructions of these pheromones.

The old ant first grew in South Africa, and now it has become a common household pest. Generally speaking, old ants mark their tracks by releasing a special chemical called pheromone. Theoretically, the lost old ants can find food or their way home by pheromone tracks and pheromone smells.

However, according to Professor Ratnicks and two other researchers, Duncan Jackson and Mike Holcomb, professors of computer science at the University of Sheffield, this method is relatively time-consuming.

Scientists at the University of Sheffield in the United Kingdom observed a small ant named Pharaoh ant carrying forage, and found that using reverse trajectory is a better way for ants to identify their direction.

Reverse trajectory means that when ants return home with full load, they can follow the path as long as they follow the opposite angle as they came out.

According to the research team of the University of Sheffield, researchers who have been studying the pheromone trajectory of ants in the past have not found such a direction sign or reversal. As they expected, ants not only look for food or nests by different pheromone concentrations on their tracks, but also by geometric figures.

Francis Ratnix, a professor of plant zoology at the University of Sheffield in the United Kingdom, said that through geometric figures (imagine a capital Y), lost ants can find their way home again. At the intersection of the trajectories, the ants coming out of the hole will find two trajectories with an angle of about 30 degrees (relative to the current trajectory) (imagine an ant crawling out of the nest-the lower part of Y). This means that when the ants start from the nest, as long as they follow these special paths marked with angles in advance, they will certainly be able to find food resources. When the workers who return home with full loads want to return to the nest, they only need to follow the "60-degree rule" created by this ant family and advance along the path with the opposite angle. Therefore, as long as the instructions of these road signs are strictly followed, the ants who go out will never miss the way home.

Andrew Jedel, a professor in the Department of Ecology and Evolutionary Biology at the University of Kansas in the United States, said that they were very surprised by the discovery that ants used trajectory geometry to determine their own direction.

Professor Jedel said that trajectory geometry will only help ants if they get lost, lack alternative direction clues and have no other ants to follow. He said: "At present, researchers don't know how often to use trajectory geometry ... In order to increase the efficiency of foraging, ants need to use this skill newly discovered by scientists."

"The Romans said that all roads lead to Rome. For ants, this is a road to the nest. " Professor Francis Ratnix said.

The marked reference can be used as a basis.

What if the mark is destroyed? Mainly secreting pheromones.

Fables seems to be trying to erase the marks drawn by ants, but ants will still find them.

Some ants seem to be good at judging by sunlight.

These possibilities are all scientific. Please have a look.

Snails have the most teeth in the world. Although its mouth is only the size of a needle tip, it has 25,600 teeth. There is a small hole in the middle of the snail's small antenna, which is its mouth. There is a serrated tongue inside, which scientists call "toothed tongue".

Snail is not a biological classification name. Generally speaking, what does it mean? ? ? ? All kinds of animals in the family, also broadly including some animals in other families of Gastropoda (including slugs, etc. ) There is no distinction between aquatic snails and terrestrial snails in general western languages. In Chinese, snails only refer to terrestrial species, although they also include many animals of different families and genera, but they are similar in shape. Snails have a relatively fragile low conical shell. Different kinds of shells are left-handed and right-handed, with obvious heads. There are two pairs of antennae in the head, the last pair of longer antennae has eyes at the top, and the ventral surface has a flat and wide abdominal foot, which moves slowly, secretes mucus under the soles of the feet, reduces friction and helps walking, and mucus can also prevent the invasion of general insects such as ants. Snails generally live in wet places and hide in plants to avoid the sun. Snails living in cold regions hibernate, and species living in tropical regions hibernate in dry seasons. The mucus secreted by them during hibernation will form a dry film to close the shell mouth, and the whole body will be hidden in the shell until the temperature and humidity are suitable. Snails are distributed almost all over the world, and different kinds of snails have different sizes. African snails can be as long as 30 cm, while northern wild species are generally less than 1 cm. Snails generally feed on leaves and buds of plants, so they are an agricultural pest. But there are also carnivorous snails that feed on other kinds of snails. The French used snails to cook, so they cultivated a Burgundy snail with thick meat, which was 40-50 cm long and weighed more than 40 grams. Now this artificially cultivated edible snail has spread all over the world with French cooking. Snails are hermaphroditic, some species can reproduce independently, but most species need two individuals to mate and exchange sperm with each other. Ordinary snails lay eggs in wet soil, and usually after two to four weeks, small snails will break out of the ground. It can lay 100 eggs at a time. Snails have many natural enemies, such as chickens, ducks, birds, toads, turtles, snakes, hedgehogs and so on. Fireflies mainly feed on snails. Snails can generally live for 2-3 years, up to 7 years at the longest, but most of them may become food for other animals in that year. Snails have different symbolic meanings in different cultures. In China, snails symbolize slowness and backwardness. In western Europe, it symbolizes tenacity and perseverance; Some people predict the weather by the action of snails. Finns believe that if snails have long tentacles, it means good weather tomorrow.

Snails have high edible and medicinal value. Rich in nutrition and delicious, it is an advanced nutritional tonic with high protein, low fat and low cholesterol and rich in more than 20 kinds of amino acids. Snails belong to Gastropoda terrestrial mollusks, and there are many kinds in the world. According to relevant data, there are 40,000 species of snails in the world. Snails are distributed in all provinces and regions of China, living in forests, shrubs, orchards, vegetable gardens, farmland, houses, parks, gardens, temples, mountains, plains, hills and other places. However, there are few species with feeding and edible value. Snail, as a kind of human food and animal protein feed with high protein and low fat, has attracted more and more attention.

Appearance characteristics

The whole body of snail includes shell, head, neck, shell membrane, feet, viscera, capsule and other parts. The spiral shell on its back has various shapes and sizes, such as pagoda, gyro, cone, sphere, pipe and so on. At present, white jade snail, covered snail, scattered snail, open snail and brown cloud agate snail all have their own unique shapes.

Living habits

Snails like to live in a dark, humid, loose and humus-rich environment, lying during the day and coming out at night. They are most afraid of direct sunlight and sensitive to environmental reactions. The optimum environment is 16 ~ 30℃(23 ~ 30℃ is the fastest). Air humidity 60% ~ 90%; The humidity of the feeding soil is about 40%; The pH value is 5 ~ 7. When the temperature is lower than 15℃, it will hibernate when it is higher than 33℃, and it may freeze or heat to death when it is lower than 5℃ or higher than 40℃.

I like to burrow into loose humus soil to inhabit, lay eggs, adjust the humidity in my body and absorb some nutrients for up to 12 hours. Omnivorous food and partial eclipse coexist. Love humidity, fear flooding. Snails have a good appetite when they eat wet food on wet nights. But floods will suffocate snails. Self-sufficiency. As soon as the little snail hatches, it crawls to eat without mother's care. When invaded by the enemy, its head and feet retract into the shell, secreting mucus to seal the mouth of the shell; When the shell is damaged and fails, it can secrete some substances to repair the body and the shell. Have great patience. Snails have amazing viability and strong cold, heat, hunger and drought tolerance. For example, constant temperature farming. The temperature is constant between 25 ~ 28℃, and the growth, development and reproduction are vigorous.

Snail's feeding habits

Snails eat a wide range of food, mainly vegetables, weeds and melon skin; Leaves, stems, buds, flowers and juicy fruits of crops; Eat all kinds of grass and green tree feed, juicy feed, bran feed and cake feed.

Four stages of snails

1) Incubation period: refers to the period from laying eggs to hatching of snails.

2) Juvenile snail stage: Juvenile snail refers to the snail stage within 30 days after hatching.

3) Oncomelania stage: When the young snail reaches the age of 1 ~ 6 months, this 5-month-old snail is called Oncomelania stage. This is a period between young snails and seed snails. Snails are at this stage of growth and development (individual expansion) and reproductive growth (growth and development of sexual organs).

4) Oncomelania period: Oncomelania snails that have grown for more than 6 months.

Species of snails

Snails are mollusks of terrestrial shellfish. Snails have lived on the earth since ancient times. There are many kinds of snails, about 25,000 species, all over the world, including thousands in China alone. Most snails are poisonous and inedible. There are about 1 1 species with edible value in China, such as brown agate snail, high-ringed snail, Hainan hard snail, wrinkled hard snail, Jiangxi Ba snail, Marba snail and white jade snail. At present, there are mainly three kinds of snails used for food and artificial breeding in the world:

French snail

Also known as grape snail, it is named because it mainly lives in grape plantations and feeds on grape stems, leaves, buds and fruits. Because it looks like an apple, it is also called an apple snail, and its scientific name is a snail. Bright snail varieties are produced in France, Italy, the former Soviet Union and other countries. The adaptation limits of temperature and loose snails are basically the same. The weight of this variety can reach 400g g.

Shells are spherical, with a height of 28~35mm and a width of 45~60mm. The shell is thick, solid and opaque, with 5.0~5.5 spiral layers, and the spiral part grows slowly and shows a low cone shape. The spiral layer is enlarged, the shell mouth is not inclined downward, and the shell surface is dark yellow-brown or yellow-brown, shiny, with many dark brown bands. The top of the shell is blunt and round, and the adult umbilical foramen is covered by the axial lip. The shell mouth is oval, the mouth edge is sharp, the lips are turned outwards, and the endoplasm is light yellow or light brown.

Walking snail

It is a "Halix" snail, native to France, Britain and other regions in Central and Western Europe. It usually lives in gardens or bushes, so it is called "garden snail", also called loose snail. Adult snails are slightly smaller, about 3 cm in diameter. Snail shell is thin and yellow-brown, with four purple-brown stripes, and its surface is covered with many yellow-brown spots. At present, the cultured snails in China are small and have poor economic benefits due to the variety degradation.

Agate snail

People in Taiwan Province province call it dewdrop snail, and in Guangdong area it is called East snail, vegetable snail or flower snail, which belongs to agate snail. Agate snails originated in Madagascar in East Africa and later spread all over the tropics. It is the largest snail in the world, so it is also called African snail. The shape of a snail is conical, and the surface of the snail shell is covered with a yellowish brown shell with dark brown patterns. Usually, the shell of an adult snail is about 6 ~ 8 cm long, 3 ~ 4 cm wide and weighs more than 50 grams. In West Africa, especially on the Gold Coast, people regard snails as the only animal, protein. Because this kind of snail tastes delicious and is welcomed by European and American bosses, it makes the African giant snail become the staple food snail in the world today. This kind of snail is a variety suitable for growing under natural conditions in China.

At present, the widely cultivated variety in China is called white snail, which is named after its white color. It belongs to mollusks, gastropods and terrestrial shellfish. Androgyny is the best of all the edible snails in the world. White jade snail is one of the unique animals in China. It has special value, special nutrition, special flavor and special uses. It has delicious meat, rich nutrition, high protein and low fat, and is rich in more than 20 kinds of amino acids. It is also the best tonic for astronauts and athletes.

It belongs to the variation variety of agate snail. Its uniqueness lies in the different muscle colors of its head, neck and feet, but it is not different from the brown cloud agate snail in shape and living habits, and its culture method is basically the same, but it requires higher sanitary conditions and higher export economic value.

Harm and prevention of snails

Snails of the same type will take citrus fruit trees as their hosts, and citrus leaves are often eaten by them, and the cortex of branches is often eaten by them, and citrus fruits form pits after eating. Its host plants include saplings, vegetables and flowers.

Snails are harmful to soybean seedlings, causing damage to leaves and stems, delaying the development of stiff seedlings and reducing the seedling rate. In severe cases, all bean sprouts are eaten up, resulting in aseptic slicing. Comprehensive measures should be taken to control snails in soybean fields.

1) Cleaning the countryside: After crops or vegetables are harvested in summer, weeds in fields, ridges and ditches should be eradicated in time, furrows should be opened to reduce humidity, and intertillage and turn over the soil, which will worsen the growth and reproduction environment of Oncomelania snails.

2) Oncomelania: Oncomelania should be killed in time in late spring and early summer, especially before the snail breeding peak in May and June. First, chickens and ducks feed snails, so be careful not to use pesticides. The second is to pick up snails manually. When working in the field, snails are picked up, or they are lured by grass and vegetables, or they are specially picked up manually. This can get twice the result with half the effort

3) Chemical control aims to protect the emergence of soybean. When the population of Oncomelania hupensis is large and is about to enter the initial stage of harm, chemical agents are used to control Oncomelania hupensis. 300 g paraformaldehyde, 50 g sucrose, 300 g 5% calcium arsenate and 400 g rice bran (first fried in a pot) are mixed into soybean-sized particles; Use 0.5 ~ 0.6 kg of 6% Mida molluscicide or 3% Miwoling granules 1.5 ~ 3 kg per mu, mix with 10 ~ 15 kg of fine soil and scatter in the field. Ditches and wetlands that snails like to inhabit should be properly replanted to minimize the harm of snails.

Medicinal value of snails

There is a record in Compendium of Materia Medica that snails are used to treat diseases. Modern Chinese medicine also recognizes that snails have the functions of clearing away heat and toxic materials, reducing swelling, treating and quenching thirst. It can be used for adjuvant treatment of diabetes, hypertension, hyperlipidemia, tracheitis, prostatitis, malignant ulcer and cancer. Efficacy; Treatment of swelling and pain, anal contraction, diuresis, application and indications: treatment of swelling and toxin; Start treating sores; Treat diseases; Treat toothache; Recently, higher nervous activity and neurophysiology of Russian Academy of Sciences are trying to treat Parkinson's disease with the nerve tissue of mollusks such as snails. Parkinson's disease is caused by the gradual degeneration of substantia nigra cells in the brain and the cessation of dopamine secretion. Its main symptoms are muscle stiffness and trembling hands and feet. It is found that mammals have weak rejection ability to mollusk tissues, and the researchers implanted snail nerve tissues into the brain of mice, which can be compatible for more than 6 months. After further improving the technology, Russian experts have been able to fuse the nerve tissue of snails with the brain tissue of mice with Parkinson's disease, and gradually restore the brain function of damaged mice. According to the above results, Russian experts will use the nerve tissue of mollusks to carry out experimental clinical treatment on volunteers with Parkinson's disease in the next stage of research.

Drug instruction

Alias: Tianluo Temple, Niu Lin and Guanniu.

Source: Eulota similaris Ferussac, a large snail, which is used to dry all or live individuals for medicine. Capture in summer and autumn, blanch in water and dry in the sun; If you use fresh products, grab them when you use them.

Nature and taste: salty and cold. A little poisonous.

Indications: clearing away heat and toxic materials and inducing diuresis. Used for carbuncle, furuncle, hemorrhoid, leakage and dysuria.

Usage and dosage: 0.5 ~ 1 RMB, ground into powder or taken as pills. Appropriate amount for external use, ground or mashed with fresh products, and applied to the affected area.

Excerpt: National Compilation of Chinese Herbal Medicine

Edible value of snails

Snail, shark's fin, shellfish and abalone are four famous dishes in the world, which contain more than 20 kinds of amino acids, 10 trace elements and are rich in snail enzyme and SOD. The content of protein is higher than that of turtle, pork, beef and egg by 1,/kloc-0, 3 and 6 percentage points respectively, while the fat content is only turtle, beef and egg. The selenium content per gram of snail meat is 0.45 micrograms, which is 4.5 times that of tea. From the perspective of market capacity, snail food conforms to the new trend of naturalization, game, nutrition and health care, and has a broad market at home and abroad. At present, the annual demand for snail products in the international market is about 400,000 tons, and the United States alone needs to import 3 billion dollars of snails every year. The market price is also high. The ex-factory price of frozen snail meat in new york is equivalent to RMB 362.39/kg, and the price of a dish made of six snails is as high as 18 USD. The price of live snails in France and Spain is equivalent to RMB116.11yuan. The price of the canned white jade snail we signed for export also reached 9000 ~ 14000 USD per ton. White jade snail is a new breed cultivated in batches in China. It is tender, white and big, and it will be more competitive in the international market. In recent years, new products such as health food series, biochemical drugs series, compound nutritious drinks series, cosmetics series, canned game series and frozen meat series have been introduced. It has been successfully developed in China, and several snail drugs for treating tracheitis, prostatitis and other diseases are about to be mass-produced. Snail secretion can also be used to refine and process natural nutritional cream.

Snail is a kind of terrestrial mollusk, which has high edible, medicinal and health care values. Its edible and medicinal history has been more than 2000 years. In foreign countries, snail is one of the seven world game, ranking first among the four famous international dishes (snail, abalone, scallop and shark's fin). In France, it has the reputation of "French cuisine". In Europe and America, there are almost no snails to celebrate Christmas. In recent years, snail eating fever has risen quietly in China's coastal open cities, and snails on the market will be out of stock every holiday. Comrade Deng Xiaoping tasted snail food before his death. He praised: "Snail food fills a gap in China and should be well developed."

Snails enjoy the reputation of "soft gold" in the world. Its meat is tender, delicious and nutritious. According to the determination, every 500g of snail meat contains 90g of protein and various nutrients needed by human body, such as amino acids, vitamins, calcium, iron, copper and phosphorus. It is a food with high protein and low fat. Snails are cold and salty. It has the effects of clearing away heat, relieving swelling, detoxicating, promoting diuresis, relieving asthma and softening hard mass. It has a certain curative effect on diabetes, cough, pharyngitis, mumps, scrofula, sore pain, hemorrhoids, centipede bites and other diseases, and is praised as a delicious food and a good health care product by consumers.

Fear of snails

Afraid of salt and dialysis, water in the body will penetrate from the body with low salt content to the body with high salt content. Salt will make snails lose water and dehydrate to death.

According to scientists' calculations, the fastest crawling speed of snails is about 12.2 meters per hour. Nowadays, people often use snail crawling as a metaphor for slow speed.

Natural enemies of snails

The most deadly natural enemy of snails is fireflies (larvae eat snails and adults lay eggs in snails). There are snails, beetles and mice. Some natural enemies that are not easy to find are parasitic bees and acaroid mites. Acaroid mites should be what you call white bugs. Many people live in groups and feed on the body fluids and epidermal mantle of snails or slugs, which will not cause much harm in a short time. If they get bigger, they will be harmful to snails. Take out the bones after getting up in the morning, often to reduce the parasitism of acaroid mites! The only reason for this is that your breeding environment is not good! Even if there is no cleaning residue and excrement, or the humidity and temperature are too high.

Development history of snail culture

Snails have a long history of food and medicine in China. Snails were recorded in detail in Erya's "Free Fish" more than 2,000 years ago. In the 6th century BC, Tao Hongjing's Records of Famous Doctors recorded an example of snail treatment. In A.D. 1774, Li Shizhen of Ming Dynasty described the morphology and medicinal value of snails in detail in Compendium of Materia Medica. Since the 20th century, many scientists have made great contributions to the study of snails, especially the cultivation and application of snails, but no breakthrough has been made. Until the 1980s, the snail production and export volume in Chinese mainland were still very small, and the export volume was not as high as that in Taiwan Province Province110. However, since the late 1980s, when snails were comprehensively analyzed and tested, it was found that they contained 20 kinds of amino acids, more than 30 kinds of enzymes and blood lectins. After truly understanding the value and function of snails to human beings, the snail breeding industry has developed vigorously and gradually become a thriving household sideline in urban and rural areas of China.

At present, there are more than 20 provinces and cities such as Hebei, Guangdong, Fujian, Shanghai, Zhejiang, Hubei, Hainan, Jiangsu, Henan, Shandong, Hunan, Sichuan, Liaoning, Inner Mongolia and Gansu. There has been an upsurge in artificial breeding of snails, which is developing towards scale and industrialization. Snail farming in China is catching up with the advanced world level.

Before the birth of white jade snail, many countries mainly raised brown cloud agate snail, because brown cloud agate snail has the advantages of fast reproduction, strong disease resistance, easy feeding and the most abundant nutrition. Since the birth of white jade snail, many countries have introduced it, because it not only has all the advantages of brown cloud agate snail, but also tastes as delicious as jade. As a result, white jade snails swept the world.

The development of white jade snails in China has accelerated the reproduction and development of white jade snails. In a short time, with the joint efforts of many experts and scholars, we not only found out the living habits and reproductive laws of white jade snails, but also comprehensively detected the nutritional components of white jade snails, and developed a series of snail products according to their nutritional values, which were exported to Southeast Asia, Europe and the United States. Therefore, the breeding, development and utilization of snails can be said to be both a traditional and ancient project and an emerging high-tech project.

The research on snails abroad was later than that in China. Scholars from some European and American countries began to study snails from18th century to19th century, but their development and utilization were ahead of China. In recent years, many developing countries have used their own resources to accelerate the development of snail farming and processing industry, and made it an important export-oriented foreign exchange earning project.

Snails are rich in nutrition. The content of protein, coumarin, alkaloid, organic acid and other elements in snail meat is higher than that in soft-shelled turtle, pork and all egg foods, especially in protein, which ranks first among animals in the world. Most of its biochemical indexes are much higher than those of spirulina, and it is known as healthy food in 2 1 century. Snails are high in protein, calcium, fat and cholesterol, which are very beneficial to human health. There are more than 20 kinds of amino acids and more than 30 kinds of enzymes in their bodies, which are most needed by people but difficult to ingest from other foods. The lectin extracted from snail protein gland has great application value in blood research. The price per gram of lectin in the international market far exceeds the price of gold, so snails are known as "soft gold".

In addition, snail enzyme extracted from snails is also an important raw material for many industries, such as medicine, biology, textile, cosmetics, wine making and so on. Therefore, the commercial value of breeding snails is very considerable.

Snail is a kind of terrestrial mollusk. The common species are homotype snail, African snail, snail, Chinese white jade snail, wild agate snail, scattered snail, bright snail, brown cloud agate snail, covered snail and apple snail. Their living habits and preventive methods are similar. Snails are not all pests.

Key points of snail culture technology

1. temperature 16 ~ 40℃, the optimum temperature is 25℃, generally high or low. Heating must be carried out by earthworm fire path, and it should be prepared all year round, especially in late spring and early autumn, to prevent sudden flooding. Conditional heating is the best, and it is not necessary to use a stove for heating.

2. humidity. The soil surface humidity of the feeding soil should be kept at 25% ~ 35%, and the relative humidity of the air should be 85% ~ 90%, so that it can be wetted, and the top should be covered with plastic sheets for moisture control and moisturizing.

3. In order to prevent dry air and cold air from blowing in directly, double doors, cloth hanging and wind deflector should be adopted for import.

4. Resolutely control the malodorous gas entering the breeding ground.

5. Feeding soil must be controlled at pH 6.5 ~ 7.5, and it is forbidden to use polluted sand containing pesticides and chemicals.

6. The culture container must have good water permeability and air permeability.

7. Don't be exposed to bright light when not working, preferably in the dark. Lighting with 15W red bulb at night can stimulate spawning.

8. Hatching of eggs. The key to the success or failure of snail farming lies in the hatching of eggs. Indoor temperature is controlled at 20~25℃, air humidity is controlled at 90% ~ 95%, and soil surface humidity is controlled at 25% ~ 30%. Improve the method of egg collection and incubation, and adopt the 60-day snail cultivation method. This method can greatly improve the reproductive efficiency of snails, and the general hatching rate is above 95%.

9. The feeding of young snails is related to the success or failure of the rapid development of snail quantity and output, and special attention should be paid to the control of temperature and humidity. Generally, the temperature should be controlled between 25 ~ 30℃, the water content of the soil is 30% ~ 35%, and the relative humidity of the air is 80% ~ 90%. Eat more fresh and juicy feed, supplemented by calcium supplements.

10. 1~3-month-old snail culture ponds should be humidified and do not splash water. Spray with a sprayer, preferably warm water.

1 1. Remove dead snails in time.

12. It's best to kill two birds with one stone when earthworms and snails are mixed.

13. Prevent the invasion of natural enemies and kill rats and ants. Regular spraying with11000 trichlorfon solution can effectively kill the largest natural enemy mite of Oncomelania hupensis, and regularly disinfect the snail breeding ground with peracetic acid diluent to kill pathogenic microorganisms.

14. The lowest cost and best feed formula: 50% rice bran, 40% shells, 8% yeast powder and 2% others.