CATDOLL : CATDOLL: What is the physiological structure of locusts?

What is the physiological structure of locusts?

Locusts have a very sensitive sense of touch. They can sense touch through the receptors on their antennae, palps, cerci, and legs. The taste organs are in the mouth, and there are olfactory organs on the antennae. There are eardrums on both sides of the first abdominal segment or at the base of the tibia of the front leg, which are responsible for hearing. The compound eyes are responsible for vision, and the simple eyes are responsible for sensing light. The hind leg segment is thick and suitable for jumping. Male locusts make sounds by rubbing the left and right wings against each other or rubbing the sound file of the hind leg segment against the raised veins of the front wings. Some species can also make sounds while flying.

Locusts have many natural enemies, mostly birds, frogs and snakes. Humans also catch them in large numbers. People in some areas even use locusts as food. Locusts are usually green, gray, brown or dark brown, with large heads and short antennae. The pronotum is hard and extends to the left and right like a saddle. The middle and metathorax are fused and cannot move. The feet of locusts are well developed, especially the muscles of the hind legs, which are strong and powerful. The hard exoskeleton makes it an expert in jumping. The tibia also has sharp saw spines, which are effective defensive weapons. In addition to antennae, the head also has a pair of compound eyes, which are the main visual organs. There are also 3 simple eyes, which can only sense light. There is a mouthpart under the head, which is the feeding organ of the locust. The mouthpart of the locust is composed of the upper lip, upper jaw, tongue, lower jaw and lower lip. Its upper jaw is very hard and suitable for chewing, so this type of mouthpart is called a chewing mouthpart. The locust's auditory organ is in its abdomen. There are tracheae of varying thicknesses that are connected vertically and horizontally in its body. The trachea branches repeatedly, and finally connects with each cell through tiny branches to carry out breathing.

The best season for locusts to breed is summer and autumn. After mating, the female locust inserts the ovipositor into the soil 10 cm deep and lays about 50 eggs. When laying eggs, the female locust secretes a white substance to form a cylindrical plug, and then lays the eggs.

The development process of locusts is somewhat complicated. Its life begins with fertilized eggs. The larvae that have just hatched from eggs have no wings and can jump. They are called "jumping nymphs". The morphology and living habits of jumping nymphs are similar to those of adults, but their bodies are smaller and their reproductive organs are not fully developed. Insects in this form are also called "nymphs". Nymphs gradually grow up, and when they are restricted by the exoskeleton and cannot grow any longer, they shed their original exoskeleton. This is called molting. Locusts molt five times in their life. From egg hatching to the first molting, it is the first instar. Each subsequent molting increases the instar by one. After the third instar, the wing buds are prominent. After the fifth instar, they become flying adults. It can be seen that the individual development process of locusts goes through three stages: egg, nymph, and adult. Such a development process is called incomplete metamorphosis. Under normal circumstances, the entire individual development history of insects from eggs to adults and the ability to produce offspring is called a generation. In some areas of my country, locusts can produce two generations of summer locusts and autumn locusts in one year, so there are two eras.

It takes about 21 days for locust eggs to hatch. The hatched nymphs crawl out of the soil. At this time, they look very similar to adults, but they have no wings and their body color is lighter. The larvae look more like adults in the first one or two instars, but their heads and bodies are not the same as grasshoppers. Wing buds grow in the third instar, and the wing buds are very obvious in the fourth instar. The nymphs in the fifth instar are already mature in body development. After feeding for a few days, they will crawl onto plants, hang down, and wait for a period of time before emerging as adults.

Locusts have developed chewing mouthparts since they were larvae, which they use to chew the stems and leaves of plants. They are good at flying and jumping, and the pair of antennae on their heads are organs that combine smell and touch. Its chewing mouthparts have a pair of developed large jaws with teeth, which can bite off the stems and leaves of plants. It has strong hind legs, and mainly relies on its hind legs when jumping. When locusts fly, the hind wings play a major role, and when they are stationary, the front wings cover the hind wings for protection. The female locust has a strong "ovipositor" at the end of its abdomen, which can be inserted into the soil to lay eggs. Locusts lay eggs mostly on moist riverbanks, lakesides, foothills and ridges. Every 30 to 60 eggs form a block. The immature locusts that hatch from the eggs are called "nymphs", and they need to shed their skin 5 times before they can develop into adults. After the rain, the sky clears up, which can promote the hatching of insect eggs in large quantities. The flying ability of locusts is truly amazing. They can fly continuously for 1 to 3 days. When locusts fly by, the sound of their wings flapping is very loud, like the howling of a storm in the ocean.

What is the structure of the locust shed?

What are the reproductive organs of adult locusts?

The antennae, palps, cerci and legs of the locust can sense touch. The taste organs are in the mouthparts, and the olfactory organs are on the antennae. There are eardrums on both sides of the first abdominal segment or at the base of the tibia of the foreleg, which are responsible for hearing. The compound eyes are responsible for vision.

The single eye is responsible for light perception. The hind leg segment is thick and suitable for jumping. The male insects make sounds by rubbing the left and right wings together or by rubbing the sound file of the hind leg segment against the raised veins of the front wings. Some species can also make sounds when flying. The habitats vary. For example, Marellia remipes in South America spends most of its life on floating plants, can swim, and lay eggs on aquatic plants. The body is medium or large, and some species (such as Tropidacris latriellei in South America) are more than 11 cm long. People in some areas use locusts as food. The natural enemies of locusts include birds, poultry, frogs and snakes, and humans also catch them in large numbers. The whole body is usually green, gray, brown or dark brown, with a large head and short antennae; the pronotum is hard and extends to the left and right sides like a saddle, and the middle and metathorax are fused and cannot move. The feet are well-developed, especially the muscles of the hind legs are strong and powerful, and the exoskeleton is hard, making it an expert in jumping. The tibia also has sharp saw spines, which are effective defensive weapons. The ovipositor has no obvious protrusion, which is the biggest difference between it and katydids. In addition to antennae, the head also has a pair of compound eyes, which are the main visual organs. There are also three simple eyes that can only sense light. There is a mouthpart under the head, which is the feeding organ of the locust. The mouthpart of the locust is composed of the upper lip (1 piece), the upper jaw (1 pair), the tongue (1 piece), the lower jaw (1 pair), and the lower lip (1 piece). Its upper jaw is very hard and suitable for chewing, so this type of mouthpart is called a chewing mouthpart. On both sides of the first segment of the locust's abdomen, there is a pair of half-moon-shaped membranes, which are the locust's auditory organs. The row of small holes arranged neatly on the left and right sides are the spiracles. From the middle thorax to the 8th segment of the abdomen, each body segment has a pair of spiracles, with a total of 10 pairs. Each spiracle is connected to the trachea inward. There are tracheae of varying thicknesses connected vertically and horizontally in the locust's body. The trachea branches again and again, and finally connects with each cell through fine branches to perform respiration. Therefore, the spiracles are the gateways for gases to enter and exit the locust's body. Diet: Herbivorous. They like to eat thick leaves, such as sweet potatoes, water spinach, cabbage, etc. Growth and development: Incomplete metamorphosis.

Edit this section Development

Summer and autumn are the breeding seasons every year. After mating, female locusts insert their ovipositors into the soil 10 cm deep and lay about 50 eggs. When laying eggs, female locusts secrete a white substance to form a cylindrical plug, and then lay the eggs. The development process of locusts is relatively complicated (as shown in the picture). Its life begins with a fertilized egg. The larvae that have just hatched from the eggs have no wings and can jump, and are called "jumping nymphs". The morphology and living habits of jumping nymphs are similar to those of adults, but their bodies are smaller and their reproductive organs are not mature. Insects in this form are also called "nymphs". Nymphs gradually grow up, and when they are restricted by the exoskeleton and cannot grow any further, they shed their original exoskeleton, which is called molting. Nymphs molt 5 times in their lifetime. From egg hatching to the first molting, it is the first instar, and each subsequent molting increases the instar by one. After the third instar, the wing buds are obvious. After the fifth instar, they become adults that can fly. It can be seen that the individual development process of locusts goes through three stages: eggs, nymphs, and adults. Such a development process is called incomplete metamorphosis. The entire individual development history of insects from fertilized eggs to adults and the ability to produce offspring is called a generation. In some areas of our country, locusts can produce two generations a year, summer locusts and autumn locusts, so there are two generations. At around 24°C, locust eggs can hatch in about 21 days. The hatched nymphs crawl out of the soil. At this time, their appearance is very similar to that of adults, but they have no wings and their body color is lighter. The larvae look more like adults in the first one or two instars, but their heads and bodies are disproportionate. In the third instar, wing buds grow, and in the fourth instar, the wing buds are already very obvious. In the fifth instar, the nymphs are already mature and will crawl onto the plants after feeding for a few days, with their bodies hanging down. After waiting for a period of time, the adults will emerge. The life of a locust goes through three developmental stages: fertilized eggs, larvae, and adults. Developmental stage one

Developmental period 3

Developmental period 3

Edit this paragraph morphology and living habits

Both adults and nymphs of locusts can chew the stems and leaves of plants with their well-developed chewing mouthparts. They are good at flying and jumping, and the pair of antennae on their heads are organs that combine smell and touch. Their chewing mouthparts have a pair of well-developed mandibles with teeth, which can bite off the stems and leaves of plants. They have strong hind legs, and mainly rely on their hind legs when jumping. When locusts fly, the hind wings play a major role, and when the locusts are stationary, the forewings cover the hind wings for protection. The female has a strong "ovipositor" at the end of its abdomen, which can be inserted into the soil to lay eggs. Locusts lay eggs mostly on moist riverbanks, lakesides, foothills and ridges. Every 30 to 60 eggs form a block. The immature locusts that hatch from the eggs are called "nymphs", and they need to shed their skin 5 times before they can develop into adults. After the rain, the sky clears up, which can promote the hatching of a large number of eggs. Locusts also have amazing flying ability and can fly continuously for 1 to 3 days. When locusts fly by, the sound of their wings is as loud as a storm in the ocean.

The hind leg segment of the adult has a row of nipple-like protrusions equivalent to the spring organ, and the base of the radial vein of the forewing has a thick vein equivalent to the string organ. When the two are rubbed, the vibration area of ​​the wing can make a sound, which is their sound organ. The locust's auditory organ is also very special, located on the side of the first segment of the abdomen. Locusts are commonly known as "grasshoppers", and the Taiwanese language is called "grass moth". Their life cycle is egg → nymph (larva) → adult, which is an incomplete metamorphosis. They have chewing mouthparts and are herbivorous insects. Most of them are not very picky about food. In the wild grass, they are often seen chewing the leaves of grass plants one bite at a time. Its antennae are not as long as those of katydids, and are short whip-like, but it has strong hind legs and can use jumping to avoid natural enemies. Sometimes you can see two locusts (male on top and female on the bottom) getting married. They breathe with lungs and belong to the arthropods (commonly known as "insects") among invertebrates.

Edit this paragraph Type

1. Rice locust

Appearance characteristics: Body length ♂21~31mm, ♀26~39mm. Back of body is gray-brown; abdomen and legs are green. Ecological habits: This species is a very common locust in the grass of plains and low-altitude areas. Adults can be found almost everywhere except in winter. It mainly feeds on the leaves of grass plants and was a major pest of rice in the early days. Living environment: plain areas, low-altitude areas (below 800 meters). Living microenvironment: grass environment. Diet: herbivorous insects, including various parts of plants and rotten fruits. Activity time: diurnal insects.

2. East Asian migratory locust

It belongs to the class Insecta, order Orthoptera, family Acrididae. According to statistics, there are 223 genera and 859 species in the superfamily Acridoidea. The East Asian migratory locust grows under natural temperature conditions, with two generations a year, the first generation is called summer locust, and the second generation is autumn locust. Now artificial breeding can be converted to four generations per year. Migratory locusts have six legs; the body is divided into three parts: head, thorax, and abdomen; there are two pairs of wings on the thorax, the forewings are keratinous, and the hind wings are membranous. The body is yellowish brown, and the male is bright yellow during the mating period. The female locust is 39.5-51.2 mm long, and the male locust is 33.0-41.5 mm long. Adults are good at jumping and flying. The East Asian migratory locust has a sturdy body, a wide range of feeding, and strong adaptability. After hatching into a young locust, it can become an adult after a 35-day feeding process, and can be sold after about 50 days of fattening, so the time is short and the return is fast. Raising 10,000 East Asian migratory locust adults can reach 20 kilograms, the economic benefits are considerable, and the seeds only need to be purchased once. The locusts reproduce themselves dozens of times, eggs hatch locusts, locusts lay eggs, and the cycle repeats. They are raised for many years and sold continuously. A female locust can lay 35 to 90 eggs at a time. The reason why migratory locusts are popular is that they are soft, tender and nutritious. According to expert analysis and determination, their protein content is as high as 74.88%, fat content is 5.25%, carbohydrate content is 4.77%, and they contain 18 kinds of amino acids and a variety of active substances. Morphological characteristics: The female adult is 39.5-51.2mm long, and the male adult is 33.5-41.5mm long. The body is yellow-brown or green. The antennae are filamentous, mostly light yellow, with a pair of compound eyes and 3 simple eyes. There are light stripes behind the compound eyes, and dark spots on the front and lower parts. The pronotum is saddle-shaped, with well-developed ridges. The forewings are well-developed, often exceeding the middle of the hind leg intestine, with dark spots and luster. The hind wings are colorless and transparent. The inner base half of the hind leg segment is black, with a black ring at the proximal end, and the tibia of the hind leg is red. In the field, affected by environmental conditions, it often forms two major types: gregarious and solitary. The egg is about 6.5mm long, light yellow, cylindrical, slightly pointed at one end, and slightly rounded and slightly curved at the other end. The egg mass is brown cylindrical, 53-67mm long, slightly curved, slightly thinner at the top, and covered with spongy colloid material, with rows of eggs at the bottom. The nymph is also called locust pupa, and its body shape is similar to that of the adult. There are 5 instars in total. Living habits: There are 2 generations per year in Beijing, Bohai Bay, the lower reaches of the Yellow River, and the Yangtze River Basin, and 3 generations in a few years; there are 3 generations per year in Guangxi, Guangdong, and Taiwan, and 4 generations in Hainan. The East Asian migratory locust does not have a dormant phenomenon, and eggs overwinter in the soil throughout the country. In the second generation areas of Shandong, Anhui, Jiangsu, etc., the overwintering eggs hatch into summer locusts from the end of April to the beginning of May. They will pupate after 35-40 days. After pupation, they will mate after 10 days and lay eggs after 7 days. The egg period is 15-20 days. In the beginning of July, the egg-laying peak period begins. The hatched nymphs are called autumn pupae, which will pupate into autumn locusts after 25-30 days. They will mate and lay eggs again after 15-20 days of life. They will start to overwinter after entering the egg-laying peak period in September. In some years with high temperature and drought, three generations of locust pupae will hatch from August to late September. Most of them will freeze to death in winter, and only a few can pupate into adults and lay eggs overwintering. When laying eggs, adults have obvious selectivity for terrain, soil properties, soil surface firmness, vegetation, etc. Each female locust generally lays 4 or 5 egg masses, each of which contains about 65 eggs. Adult migratory locusts feed almost all day. When the density of migratory locusts is low, they are solitary. When the density is high, individuals come into contact with each other and gradually gather into gregarious types. Social migratory locusts have the habit of long-distance migration. Migration usually occurs 5-10 days after emergence and before the genital tubes mature. Migration can last 1-3 days in the air. As for solitary migratory locusts, when there are more than 10 insects per square meter, migration sometimes occurs. Social migratory locusts contain more fat and less water in their bodies, and have strong activity, but they have fewer ovarian tubes and lower egg production. The opposite is true for solitary locusts. Migratory locusts like to live in low-lying beaches or lake beaches that are prone to flooding and drought or unstable water levels, large areas of wasteland or extensively cultivated wasteland, and plants that they love to feed on, such as low reeds, thatch or salt sedge, and sedge. In drought years, when the water surface shrinks and expands due to the dry weather, it is conducive to the reproduction of locusts, and the area suitable for locusts increases, which is easy to cause locust plagues. Therefore, every year of severe drought, we must pay attention to the prevention and control of locusts. Natural enemies include parasitic wasps, parasitic flies, birds, frogs, etc.

3. Red Queen Locust

The body length of males is 20-25mm, and that of females is 34-42mm. The body color is simple green or brown; the head is long and pointed, and there are small white protrusions on the head, chest and feet. It is commonly known as the "pointed grasshopper"; the lower wings are light red when flying. It is the most common locust in China. Adults can be seen all year round, living in the grass on the edge of the forest in the plains to the middle altitude mountains. Adults can chew all kinds of green plants, often leaving many irregular holes in the leaves of plants. This kind of locust is good at jumping but not good at flying. Its body has excellent protective color and is not easy to be found.

4. Taiwan locust

The Taiwan locust is different from the East Asian migratory locust. The Taiwan locust is the largest of the Taiwan locusts, especially the female locust, which can reach 8 or 9 cm in length. In terms of ecological habits, no matter which kind of locust is considered a fierce and warlike locust. However, for those who have tried to catch the Taiwan locust with their bare hands, they have a different experience, because behind the red meridians of the thick hind legs of the Taiwan locust are sharp thorns; when caught, it will kick its hind legs violently. For children with delicate skin, if they want to catch it with their hands, they may get a tingling sensation on their fingers or palms, and even bleed! The biggest feature of locusts is that they have very developed hind legs, which are suitable for long-distance jumping and can easily jump to the body... The so-called grasshopper is a locust. The Taiwan locust is widely distributed. Adults mainly appear in autumn, while in the south in winter, and even in the spring of the following year, adults can be seen. This species is an annual insect, mainly distributed in low-altitude mountainous areas. In autumn, the female insect lays eggs on the surface and then slowly dies. The egg sacs overwinter underground and begin to hatch in the spring of the following year. The hatched larvae feed on various plants such as Poaceae and Leguminosae.

5. Oxya

The body length is 2.2 - 3.5 cm, with a wide black band from the back of the compound eyes to the wing tip, a slender body, and black spots on the antennae. The lotus leaves are their bite marks, their masterpieces, and are as gorgeous as a painting.

6. Taiwan rice locust

Physical characteristics: The male body length is 21~31mm, and the female body length is 24~39mm. The back of the body is gray-brown, and the abdomen and legs are green. The body color is quite different, which will be similar to the habitat and form a protective color. Ecological habits: Rice locusts are very common locusts in the grass on plains and low-altitude areas, and two generations can occur each year. The main reason why locusts move in groups is because they physiologically need high temperatures and stay close together to keep warm. The adult's hind leg femur has a row of nipple-like protrusions that are equivalent to a spring, and there are thick veins at the base of the radial veins of the forewings that are equivalent to a string instrument. When the two rub against each other, the vibration area of ​​the wing can make a sound, which is their sound organ. The locust's auditory organ is also very special. Taiwan Rice Locust

Located on the side of the first segment of the abdomen. Locusts can be divided into migratory and non-migratory types according to their living habits. Both types pose a great threat to crops, especially the former, which is very destructive. As long as they pass through, all green plants will be eaten up. The shock brought by the locust plague is really not flattering. Its diet is very diverse, eating all kinds of green plants, especially grass plants. Nymphs are also called locust nymphs. They look like adults, but they only have wing buds (cannot fly) and are good at jumping. After molting four to seven times, they will transform into adults who are good at jumping and flying. Some locusts have short antennae and short ovipositors. There are currently more than 5,000 species of locusts in the world. The longest part of a locust's body is the hind leg, which is about the same length as its body. It can jump eight times the length of its body in one jump. The hind leg of a locust is also its best musical instrument. It can make sounds by rubbing against its wings. Classification: All insects belonging to the order Locusta in the order Orthoptera. Species: There are about 12,000 species in the world, and more than 100 species are known in Taiwan. Life cycle: egg → nymph → adult. Appearance characteristics: Commonly known as grasshoppers, Taiwanese people call them grass moths. There is a folk song "Grasshoppers play with cocks", the lyrics of which describe the situation of this small insect teasing with a big rooster. This was a common scene in the countryside in Taiwan in the early years. Locusts passing through is a familiar idiom. Diet: It is a herbivorous insect, most of which are not particularly picky. Another type: The ridged locust, which is used to living on moist and exposed ground, mainly feeds on moss plants. Habitat and protective color: It has a typical protective color, which has an excellent stealth effect in the grass. The hind legs are thick and well-developed, and are good at jumping. When they encounter danger, it is their usual way to avoid enemies. Mating behavior: Compared with other insects, the mating time is relatively long. Therefore, it is common to see the female at the bottom and the male at the top, and the couples.

Edit this section Prevention and treatment

Agricultural control

(1) Develop water conservancy projects to prevent drought and flood disasters. (2) Reclaim large areas of wasteland for planting, change the habitat of locusts, and reduce the area of ​​the base of occurrence. (3) Plant trees to change the microclimate in locust areas and reduce the number of suitable places for locusts to lay eggs and reproduce. (4) Improve farming and cultivation techniques to control locust eggs, change the layout of crops according to local conditions, and reduce locust damage.

Biological control

(1) In locust-affected areas, use highly effective and low-toxic agricultural and biological pesticides to protect the predatory natural enemies in the locust areas. Chickens, ducks, geese and other poultry can also be raised on the hillsides for prevention and control. (2) Apply microsporidia over a large area.

Notes on raising locusts

1. Selection and identification of locust breeding sources

Methods for determining locust species include: Grasshopper (20 photos) (1) Consult locust classification experts. (2) Consult locust retrieval tables or atlases. (3) Consult experienced locust breeders. (4) Send locust species to customers for identification and review. Common types of farmed locusts include: East Asian migratory locust, cotton locust, Chinese rice locust, Chinese grasshopper, etc. These species have their own advantages and disadvantages. It is necessary to comprehensively consider factors such as their growth cycle, generation, taste, food, size, and the species required by the customer, and select the breeding species based on the local climate, food source, etc.

2. Construction of locust breeding shed and preparation of shed land

Before building the shed, first eliminate all ants and mole crickets on the ground. You can use methods such as capture, trapping, and scalding with boiling water. The above insects are natural enemies of locusts and can prey on locusts and destroy locust eggs, so these animals must not be allowed to exist in the shed. In order to facilitate drainage in the rainy season, the floor of the shed should be 10-15 cm higher than the ground. The soil is preferably sandy loam, which is not easy to clump and is convenient for laying eggs. In mid-April, crops such as wheat can be planted on the ground where the shed is built to prepare food for young locusts. The construction area of ​​the shed is determined by the number of locusts to be raised. Fifteen square meters is enough to raise 10,000 locusts. You can use the vacant space inside and outside the yard. According to your own conditions, you can use iron wire, wooden sticks, bamboo strips, etc. to build a shed support. Then, according to the size of the shed, use edge cloth (screen cloth) to make a shed cover like a mosquito net, hang it on the shed, bury the bottom edge in the ground, leave a door, and install a zipper on the door. This device is to prevent locusts from running out and facilitate entry and exit for feeding and management. (You can also build an arched shed) The height of the shed can be 1.5-2 meters. In order to keep warm and prevent rain, you can cover the shed with plastic sheeting. When the temperature is high and the locusts are large (older) and not afraid of rain, you don't need to cover them with plastic sheeting. If you use natural conditions to breed migratory locusts, the construction of the shed must be completed before the end of April, and it is best to choose a place with plenty of sunshine.

3. Nymph stage management

⑴ The locust larvae eat very little and like to eat fresh and tender plants. At this stage, the locusts are very fragile, so you should pay attention to rain protection to prevent the locust larvae from drowning. ⑵ The temperature should be controlled at 25-30℃, the light should be more than 12 hours, and the humidity should be kept at about 15%. Under these conditions, the locusts are most active, like to eat, and are conducive to growth. ⑶ The food intake of locust larvae above the third instar gradually increases. At this time, it is necessary to ensure that there is sufficient food in the shed, otherwise it will affect their normal growth and they will kill each other. ⑷ Keep the shed clean and clean it once every 1-2 days to prevent diseases.

4. Locusts are destructive insects

It is different from other special breeding industries. On the one hand, breeding it can turn harm into treasure and increase farmers' income, but on the other hand, it increases the number of locusts, forming a potential hazard. Necessary safety management measures must be taken for its breeding to achieve twice the result with half the effort. For large-scale breeding, according to the standard of breeding on one mu of land, a half-meter wide plant contamination isolation zone should be built around the breeding site, and the surrounding area should be fenced with wire mesh and equipped with pesticide sprayers. There are many kinds of pesticides to kill locusts. You can use 75% malathion emulsifiable concentrate or 2.5% dimethoate and other pyrethroid insecticides to kill them. If farmers do not want to breed locusts, they must take the last extermination measures. If farmers do not want to breed, they should make preparations in advance. The breeding shed cannot be removed before May 20th of each spring. After all the locusts are unearthed and before they become adults, they should be killed with pesticides, so that there will be no harm. If farmers decide not to raise locusts before the end of autumn, they must sell all the locusts before September 10, that is, before they mate, or kill them with pesticides and not allow them to lay eggs in the breeding sheds. Only such measures can ensure that potential hazards in the future are eradicated and are conducive to the healthy development of the locust breeding industry.

Edit this paragraph purpose

Biological characteristics and value of locusts: Locusts are both medicinal and edible insects, oviparous, belonging to the order Orthoptera, family Acrididae, class Insecta. According to statistics, there are 859 species of locusts in the family Acrididae, and there are two main types of locusts that can be used as medicine and food, namely the East Asian migratory locust and the Chinese rice locust. These two locusts are rich in nutrition, with soft, tender meat and delicious like shrimp. According to books such as "Research on Migratory Locusts" and "Feed Value of Migratory Locusts", locusts are rich in active substances such as protein, carbohydrates, insect hormones, and contain vitamins A, B, C and trace elements such as phosphorus, calcium, iron, zinc, and manganese. Locusts are not only delicious food, but also a good medicine for treating diseases, with the effects of warming the stomach and ribs, strengthening the spleen and digestion, and dispelling wind and relieving cough. "Compendium of Materia Medica" records that locusts can be used alone or in combination to treat a variety of diseases, such as tetanus, infantile convulsions, fever, asthma, sha swell, cormorant plague, frostbite, tracheitis, and prevention of cardiovascular and cerebrovascular diseases. Ten locusts can be boiled in water or fried and ground into powder for consumption, five locusts per serving. For chilblains, fry and grind into powder, mix with sesame oil and apply to the affected area. With the development of society and the continuous improvement of the quality of life, the human table has changed from traditional types such as chicken, duck, fish and meat to green game types. Locusts are rich in nutrition, tender in meat, and delicious like shrimp. In Hong Kong and other places, they are known as "flying shrimps" and are a favorite food for people from all over the world. In the United States, "insect banquets" are held to entertain guests, including locusts. According to reports, some patients with obesity, hypertension, cardiovascular and cerebrovascular diseases currently tend to eat insects in order to achieve the purpose of losing weight and curing diseases. Insect food has become popular in some countries and regions accordingly. Cooking with insects, or making them into canned food, biscuits, ice cream and other foods are very popular.

Edit this paragraph Realistic metaphor

It is used to describe people who do not work but eat up the fruits of collective labor. Locusts are pests that eat away crops, so it is the best metaphor for people who get something for nothing and sit back and enjoy the fruits of others' labor. It is used to describe people who start something all at once, such as the so-called "locust economy" now.

Edit this section: Dietary value

The body of the Chinese rice locust, migratory locust, etc. of the family Acrididae. Also known as grasshoppers. Distributed in North my country, East China, Central and South China, Sichuan, Shaanxi, Gansu, Taiwan and other regions. After obtaining, remove the wings and legs, wash, and scald to death with boiling water before eating. Fried locusts

Contains high protein. It is the most ideal food. [Performance] It tastes sweet and spicy, and is warm in nature. It can strengthen the spleen and digest food, calm wind and stop spasms, stop coughing and asthma, and dredge the meridians. [Reference] It is rich in protein and fat, calcium, phosphorus, iron, copper, manganese, vitamins A and B, etc. [Use] It is used for spleen deficiency, poor appetite or malnutrition; acute and chronic convulsions, convulsions and spasms; whooping cough, bronchial asthma, wheezing and coughing. [Usage] Decoction, stir-fry, or grind into powder. [Additional prescription] 1. Fennel fried locusts: 30g locusts and 6g fennel. Stir-fry together in cooking oil, add a little salt and stir well when cooked. This recipe uses locusts to strengthen the spleen and digest food, and fennel to regulate qi and strengthen the stomach. It is used for spleen deficiency and qi stagnation, fullness and pain in the abdomen, and reduced diet. 2. Grasshopper powder: roast and dry locusts and grind into powder. Take 3g each time, 3 times a day. "Jiu Sheng Ku Hai" uses wine to take this product to treat tetanus; "Ben Cao Gang Mu Shi Yi" uses sugar to take it to treat infantile convulsions. Both use this product to stop spasms and calm internal wind. But they are all methods of treating symptoms (relieving symptoms), and should be used with drugs that treat the root cause. 3. Grasshopper and Uncaria soup: 10 locusts, 15g Uncaria, 10g mint leaves. Add water and decoct. Originated from "Bai Cao Jing". This recipe uses locusts and Uncaria to stop wind and stop spasms, and mint leaves to disperse wind and heat. It is used for convulsions, fever, convulsions and spasms. 4. Grasshopper soup: 30 locusts, add water and decoct, take 3 times. Originated from "Ben Cao Gang Mu Shi Yi". This recipe specifically uses locusts to stop coughing, reduce adverse reactions, and calm asthma. It is used for whooping cough, coughing and shortness of breath, and continuous. It can also be used for bronchial asthma, etc.

Edit this section Locust plague

Humans have long noticed that severe locust plagues are often accompanied by severe droughts. There are records of "extreme droughts and locusts" in ancient Chinese books. In recent years, several major locust plagues in Africa have also been associated with severe droughts in the area. The main reason for this phenomenon is that locusts are insects that like warm and dry environments, and arid environments have many benefits for their reproduction, growth, development and survival. Because locusts lay their eggs in the soil, the soil is relatively solid, and the water content is 10% to 20%, which is most suitable for them to lay eggs. Drought causes locusts to reproduce in large numbers and grow rapidly, causing disasters for two reasons. On the one hand, in drought years, due to the drop in water levels, the soil becomes relatively solid, the water content decreases, and the ground vegetation is sparse, the number of locust eggs laid increases greatly, and sometimes up to 4,000 to 5,000 egg masses are laid per square meter of soil, each egg mass contains 50 to 80 eggs, that is, 200,000 to 400,000 eggs per square meter. At the same time, in drought years, the surface of rivers and lakes shrinks, and low-lying areas are exposed, which also provides more suitable places for locusts to lay eggs. On the other hand, plants grown in arid environments have low water content, and locusts feed on them, grow faster, and have higher fertility. On the contrary, rainy and humid environments have many adverse effects on the reproduction of locusts. The high water content of plants that locusts feed on will delay their growth and reduce their fertility. Rainy and humid environments will also cause locusts to spread diseases, and rain and snow can directly kill locust eggs. In addition, the increase in natural enemies such as frogs will also increase the mortality rate of locusts. When a locust is touched on a certain part of its hind legs, it will change its original solitary habit and become gregarious. Locusts are usually timid and like to live alone, and their harm is limited. But sometimes they change their habits and like to live in groups, eventually gathering in large numbers and migrating collectively, forming a terrifying locust plague that causes great damage to agriculture. Scientists at Oxford University said they conducted experiments on desert locusts in the solitary stage, repeatedly touching multiple parts of the locusts' bodies to find out whether there are certain tactile factors that change the locusts' habits. The results showed that when a certain part of the locusts' hind legs was stimulated, they suddenly became fond of living in groups, while touching other parts of the body such as the antennae, mouth or abdomen did not have this effect. Since early April 2010, a large number of locusts have swept across four states in southeastern Australia, covering an area of ​​about 500,000 square kilometers, causing serious impacts on the production and life of local residents. Experts predict that the locust disaster may spread to inland areas. The affected areas include Queensland, New South Wales, Victoria and South Australia, where millions of acres of wheat and pasture have been eaten by locusts. These locusts move very fast, and huge locust swarms can fly across hundreds of kilometers overnight, causing the most serious losses to local farmers. The normal lives of residents have also been affected. Due to concerns that locusts may be involved in aircraft engines, traffic on some roads and civil aviation departments has been forced to be interrupted. Some car drivers have to install guardrails on the front windows to avoid being disturbed by locusts and causing accidents.

The reproductive organs of male insects are composed of internal reproductive organs and external reproductive organs. The internal reproductive organs are composed of gonads and reproductive tracts.

The typical male gonads are paired testicles. The vas deferens connected to the testicles are mostly enlarged into seminal vesicles. The seminal vesicles of some insects can evolve into sperm pumps.