CATDOLL : CATDOLL: Fly breeding technology training courseware (fly breeding technology training courseware ppt)

1. Shandong fly breeding technology?

The use of cage nets to raise flies in ordinary houses has been a commonly used technology in China in recent years.

This technology requires heating facilities to be installed in the room. Otherwise, when the indoor temperature in autumn, winter and spring does not reach 27 degrees Celsius, the reproduction capacity of flies will be seriously reduced. When the room heating temperature is low, especially in the north, flies have to be pupated to survive the winter, which causes the fly breeding to be interrupted and the economic benefits to decline sharply.

Breeding flies in plastic greenhouses has successfully solved this problem. It allows flies to be produced continuously all year round, increasing breeding efficiency several times, making it a very promising technology.

Flies have the following requirements in terms of temperature, humidity and light:

The most suitable temperature for flies is 27℃～30℃. At 8～12℃, flies can move, but cannot mate or stand on food. They can only land on the ceiling and walls and do not like to move. At -5℃, they die in 3～5 days. Fly larvae require higher temperatures than adults. The most suitable temperature for their fastest development is 35℃. They stop moving at -1～2℃ and die at -5～6℃. When the temperature is too high (45～55℃), their growth rate is reduced by half compared with normal temperature.

Fly larvae require a food temperature of 30-35℃. In terms of humidity, adult flies require an indoor humidity of 55%-60%. When the humidity is too high, the legs and body of flies are easily wet and hinder their activities. The humidity required during the growth period of larvae is 65%-70%. Flies like to move around in bright places. The brighter the light, the more active they are. Artificially bred flies should be equipped with lighting in the room, with more than 10 hours of light per day.

The use of plastic greenhouses to raise flies can easily meet these characteristic requirements of flies during reproduction, and its advantages are as follows:

1. The feeding temperature is significantly increased

Without the need for special heating facilities, the temperature in the shed can be easily maintained at 27-30℃ in spring, summer and autumn. By rolling up and covering the straw curtains on the roof, the temperature increase and decrease measures are simple and easy, and almost no increase in breeding costs. Even in the cold winter, the temperature in the shed can reach an average of about 20℃.

2. Humidity is stable and easy to maintain

To raise flies in ordinary houses, you need to constantly sprinkle water on the ground to maintain a certain humidity. However, in a plastic greenhouse, because of its good airtightness and the fact that the ground is not hardened with cement, there is no need to sprinkle water or specially adjust the humidity.

3. Adequate lighting

In the plastic greenhouse, lift the straw curtain on the roof, and the sunlight filtered by the plastic film will illuminate the entire greenhouse, making lighting maintenance simple and easy.

The area of ​​the greenhouse can be determined according to the size of the breeding. There are two ways to raise flies in a plastic greenhouse: one is to set up a three-dimensional gauze net in the greenhouse and raise flies in the net; the other is to raise flies in the greenhouse, stack a certain amount of straw and straw rope in the greenhouse, and regard each greenhouse as a cage. This method requires more investment than the previous method, occupies a large area, and has a low breeding density.

The breeding method of setting up gauze in the greenhouse generally builds a plastic greenhouse with a length of 20 meters, a width of 4 meters, a low wall height of 2 meters, and a high wall height of 3 meters, with 3 layers of gauze.

How to raise adult flies:

Breeding cage: The cage frame is 50×50×50 cm in size, with a gauze of the same size tied on it. In the center of one end of the gauze is a cloth sleeve with a diameter of about 20 cm and a length of 33 cm, which is used to take flies out and change food.

A feeding dish (7-9 cm in diameter) is filled with sugar for adult flies to eat, or a piece of water-soaked foam plastic is placed inside it to provide a water source for adult flies, which can also be used to attract eggs.

8,000 to 10,000 adult flies are raised in each cage. Whether it is newly collected adult flies or adult flies that have just emerged, sugar and water must be provided in time to prevent them from starving to death. Adult flies lay eggs 3 to 5 times in their lifetime, up to 10 times, and each time they lay 100 to 150 to 300 eggs.

Larvae rearing method: First place the feed in the rearing box with a thickness of no more than 4 cm. Then use a worm shovel to slowly place the trapped fly eggs (one-day-old larvae) on the feed in the rearing box. The young maggots will slowly disperse and drill into the feed. When the larvae eat the feed, they generally eat from top to bottom. If the humidity or temperature in the box is high, or the feed is insufficient, or the insect density is too high, the young maggots will crawl out. The breeder should check at any time and take timely measures such as adding feed or lowering the temperature or humidity.

2. What are the correct methods and precautions for breeding flies?

1. Design of fly house. Flies should be raised indoors, and it is best to build a new fly house in a semi-basement. The breeding room of the fly house does not open directly to the outside. There is a closed corridor in the house, which leads to the corridor from the back door of the studio. Black curtains should be hung on the door to prevent flies from escaping. Screens and heating equipment should be installed on the windows. The room temperature should be kept at 20-30℃, with a minimum of no less than 15℃ and a maximum of no more than 35℃.

2. Main equipment for flies. There are fly cages, food trays, egg-laying trays, and eclosion trays. The fly cage can be made into a 60-80 cm cube with thick iron wire, covered with white gauze, with an operation opening on one side. The size of the opening is suitable for placing food trays and egg trays. A sleeve is made of black cloth at the opening to prevent flies from escaping. Each food tray is equipped with 3-4 medium trays for flies to lick the feed. A small water cup is placed in each cage, and a sponge pad is placed in the cup. An egg-laying primer is placed in the egg-laying tray to induce female flies to lay eggs. The eclosion tray is used to hold the quickly eclosing fly pupae during the generation change.

3. Fly breeding and management. ① Breeding fly feed: grind the 4-day-old maggots cultured aseptically, add 60% brown sugar, 2% yeast powder and appropriate amount of water to make a paste, and add 0.1% sodium benzoate. ② Egg-laying primer: take bran and add 0.03% ammonium bicarbonate and mix well, or use chicken feces is better. ③ Stocking density: 50,000 to 80,000 flies per cubic meter of fly cage, generally 10,000 to 20,000. ④ Management method: When the breeding flies are found to be mating, they are placed in the egg-laying tray 2 days later. The egg-laying primer should be loose and evenly spread, with a thickness of 1 to 2 cm. Breeding flies lay the most eggs between 8 and 15 o'clock every day, and the egg-laying tray should be replaced in time. ⑤ Winter seed preservation: The fly pupae that have been selected and removed from the inferior can be stored in a container with appropriate temperature, humidity and loose feces, and placed indoors and covered with straw to keep warm and moist.

Key points for breeding and reproduction of flies

The use of plastic greenhouses to raise flies can easily meet these characteristic requirements of flies during reproduction, and its advantages are as follows:

1. The breeding temperature is significantly increased. There is no need for special heating facilities for flies. In spring, summer and autumn, the temperature in the shed can be easily maintained at 27-30℃. By rolling up and covering the straw curtains on the roof, the temperature increase and decrease measures are simple and easy, and the breeding cost is almost not increased. Even in the cold winter, the temperature in the shed can reach an average of about 20℃.

2. Stable humidity is easy to maintain. To raise flies in ordinary houses, you need to constantly sprinkle water on the ground to maintain a certain humidity. In the plastic greenhouse, because of its good airtightness and the ground not hardened with cement, there is no need to sprinkle water or specially adjust the humidity.

3. Sufficient light In the plastic greenhouse, lift the straw curtain on the roof, and the sunlight filtered by the plastic film will illuminate the entire greenhouse, making it simple and easy to maintain light.

3. Complete version of fly maggot breeding technology?

Fly maggot breeding technology:

1. Construction of breeding facilities

1. Construction of fly breeding room

The breeding house is used to raise adult flies. Generally, 20 to 40 square meters is enough. You can renovate an old house, which can also save costs.

The house should be equipped with screen doors and windows to prevent flies from escaping.

If you raise them in winter, you need heating equipment, preferably a heater, and if conditions permit, you can also install air conditioning. The indoor air should be fresh and the sunlight should be more than 10 hours a day.

Flies are mostly raised in cages. Cages not only take up less space, but most importantly, they do not pollute the environment. We can set up a breeding rack in the fly breeding room. The breeding rack is made of wood and can be divided into two layers. Each layer of the breeding rack is placed with a fly cage made of nylon mesh. The fly cage is fixed on the rack like a mosquito net. The cage is 100 cm long, 40 cm wide and 80 cm high. The breeding flies are kept in the cage; at the same time, a working opening with a diameter of 30 cm is left in the middle and lower part of the fly cage. The working opening should be made into a cylindrical tube with white cloth to facilitate feeding, watering and taking and placing the egg-laying pad.

In addition, a piece of nylon gauze can be hung in the middle of the cage to increase the habitat area for adult flies. The bottom of the cage is supported on a small flat plate.

In addition, each fly cage should be equipped with a feeding tray (a plastic dish with a diameter of 15-20 cm), a water tray (25 cm x 15 cm x 6 cm), an emergence tray (40 cm x 30 cm x 8 cm) and an egg tray for holding eggs (40 cm x 30 cm x 8 cm).

2. Construction of maggot breeding room

The maggot breeding room is mainly used to breed fly maggots for seed preservation. The room temperature is required to be between 20 and 28 degrees Celsius, and the humidity is 65% to 70%. Other indoor breeding facilities should be determined according to the breeding method adopted, such as setting up multi-layer breeding racks, maggot breeding basins and heating equipment. Generally, these facilities are placed on both sides, leaving a walking path in the middle, which can fully utilize the space and facilitate operation and management.

3. Construction of maggot breeding greenhouse

Maggot breeding shed is specially used to breed fly maggots for protein feed. It can be built into a simple shed as long as it is windproof and waterproof.

The maggot breeding pond can be designed as this long strip pond or a small rectangular pond.

If it is a long strip pool, the length is not limited, the width is about 1.2 meters, and the two long sides have a certain slope, the angle is 45 degrees, and at the same time, the two long sides should have 11-20 cm grooves, and the height of the grooves is about 8-10 cm. This is to facilitate the collection of fly maggots in the future.

If it is a small rectangular pool, the area is usually 3-4 square meters. There are slopes and grooves on all four sides. The setting requirements of the slope and groove can be operated with reference to the long strip pool. The only difference is that you can bury the maggot collection bucket at the corner of this pool, and the edge of the bucket should be slightly higher than the bottom of the pool, which is also for the convenience of collecting maggots.

After the breeding facilities are built, the next step is to cultivate maggots.

2. Cultivation of fly maggots

The specific operational steps for breeding fly maggots can be divided into the following aspects (diagram): hatching of pupae → breeding of seed flies → collection of egg masses → centralized hatching → breeding in separate trays (part of which is retained for seed) → separation of maggots → breeding of maggots → utilization of fresh maggots → repeated cycle of production.

1. Breeding of fly species

Put the purchased fly seeds into the hatching tray. Basically, 10,000 fly seeds are about 150 grams. Usually, a hatching tray of 40 cm long, 30 cm wide and 8 cm high can hold up to 750 grams of fly seeds.

2. Hatching of pupae

Put the hatching plate into the fly cage and tie the working opening tightly. As long as the appropriate temperature and humidity are maintained, the flies will hatch into flies after 3-4 days. Generally, the most suitable temperature for flies is 25℃-30℃, and the relative humidity of the air is preferably 50%-80%. If the temperature is low in winter, turn on the heater to increase the temperature, and you can also turn on the air conditioner if conditions permit. If the temperature is around 36 degrees, the flies will hatch into flies in two days.

When flies emerge from their cocoons, feed trays and water basins should be placed. Flies, like other animals, also need enough protein, sugar and water to maintain life and reproduction. Under artificial breeding conditions, we use 50% milk powder and 50% sugar. Sugar can be some expired sugar cubes, which can also save costs.

Put sugar and milk powder in two feed plates respectively; put a sponge of the same size and 2 cm thick in the water basin, and then add water on the same level as the sponge to prevent flies from falling into the water and drowning when drinking water.

In addition, in order to promote the development of flies and their mating and egg laying, water, sugar and milk powder should be added in time to ensure that the flies have adequate nutrition. At the same time, in order to increase the egg laying rate, you can feed one-third of raw eggs to each cage every day from the time the flies emerge, and feed for three consecutive days to achieve the best results. When feeding eggs, it is best to lay a layer of gauze on the surface of the eggs in the feed tray to prevent flies from sticking to them when eating.

During this period, not only the temperature and humidity must be maintained, but also the appropriate light, because appropriate light can stimulate adult flies to feed and lay eggs. Generally, the light exposure for adult flies is 10-11 hours a day. Natural light can be used on sunny days, and fluorescent or incandescent light should be used on rainy days or when the light is relatively dim. Turn off the light at night to let them rest. The breeding fly room should be ventilated frequently to keep the indoor air fresh.

On the fourth day after the adult eclosion, flies can be seen mating, and on the fifth day, they can lay eggs. Therefore, on the fourth day, egg-laying materials should be placed in the fly cage in time. Egg-laying materials are solid feeds used to lure flies to lay eggs. This type of feed is nutritionally comprehensive, can meet the nutritional needs of flies, and has a strong attraction to flies. We usually choose wheat bran as egg-laying materials. However, wheat bran must be moistened before use. Just add clean water to the wheat bran so that it can drip water and can be loose when put down. Spread a layer of the adjusted wheat bran in the egg-laying basin with a thickness of about 1 cm. The four corners should be slightly thicker, about 2-3 cm. Put the egg-laying materials in the fly cage. After mating, flies will naturally lay eggs on wheat bran. Fly eggs are white, and milk powder is also white, so after starting to lay eggs, you only need to add sugar to the feed tray instead of milk powder. The purpose is to prevent flies from laying eggs on milk powder and delaying egg collection.

4. How to raise engineered flies?

As we all know, flies are insects that can transmit a variety of bacterial viruses. They can bring germs to food and cause harm to human health. Therefore, flies have always been the target of elimination. Flies often appear in the dirtiest places, so why don't they get sick? This phenomenon gives scientists an inspiration. Studies have found that flies contain a variety of antibiotics, antimicrobial peptides and other antibacterial substances, which can resist or even kill bacteria. We can use them reasonably, do a good job of prevention, and benefit mankind. Experiments have shown that fly maggots do not contain any toxins and can be eaten safely. They also have a high protein content and a high vitamin E content. Dried fly maggots can be used as protein feed for poultry, aquatic products and other animals, and are favored by the majority of breeders. There are many varieties of flies, and the ones with the highest nutritional protein content and breeding output are "engineered flies."

1. The growth process of flies

The growth process of flies is divided into four stages: egg, maggot (larva), pupa, and fly (adult).

1. Eggs: After the flies hatch, they will be raised artificially for 3 to 5 days before mating, reproduction and egg laying. The egg-laying period is 5-10 days. The egg-laying feed should be fermented in advance, and the moisture content and ratio should be controlled. After the fly eggs are extracted, they will be immediately placed in the hatching room for hatching. The temperature, humidity and ventilation time of the hatching room should be adjusted according to the season. The hatching time of the fly eggs is generally 8-24 hours. After hatching, they can be prepared for breeding in the fly maggot pool.

Fly breeding and management methods

Fly breeding technology

2. Maggots (larvae): Sowing is distributed according to the density of hatched larvae (Note: If the larval density is too small, the larvae will grow large, but the yield will be too low. If the density is too large, the nutrition will be insufficient and the maggots will become smaller). The ratio of the base material for sowing in the maggot pool should be required (the moisture content of fresh pig manure should not be too much or too little. If the base material is not properly controlled, it will seriously affect the development and growth of the larvae and even cause death). Maggots mature in about 4 days in summer and about 6-8 days in winter. According to the current maggot breeding technology, maggots can be bred all year round.

3. Pupa: When the fly maggots mature, they crawl into a drier environment, shrinking back and forth to become pupae, and their body color changes from light to dark, and finally to chestnut brown. It takes 2-4 days for the maggots to become pupae. The thick maggot pupae can be kept as seeds to ensure the reproduction rate of the next generation and extend the egg-laying period, and cycle breeding.

4. Flies: When the body color of the pupa changes to chestnut brown or black, flies begin to hatch. At this time, we must gently put the pupa into the fly net of the fly room. The number of pupae to be released depends on the size of the fly net, and the density cannot be too high. The front end of the pupa shell breaks, and the flies crawl out from the break. They need to go through five stages of "stationary - crawling - stretching the body - spreading wings - hardening the body wall" to develop into adult flies with the ability to fly, feed and reproduce. After the peak period of fly egg-laying, the flies are generally processed within 12-16 days and replaced with a new generation.

2. Breeding technology of fly species

1. Fly breeding room. The indoor air should be fresh, the temperature should be maintained at 24-30 degrees Celsius, the relative humidity should be 50%-70%, and the light should be more than 10 hours a day. The room should be equipped with fly cages, cage racks, thermometers and humidity meters, and heating, exhaust, and escape prevention equipment.

2. Fly cage production. Use thick iron wire or bamboo strips to make a square fly cage with a height and width of 50 cm, and cover it with plastic mesh. Leave a 20 cm diameter operating hole on one side, and slit the hole with a 30 cm long cloth tube, which is usually tied tightly. Put three layers of fly cages on the cage frame, and each cage can raise 10,000 to 15,000 breeding flies.

3. Source of breeding flies. The first batch of sterile flies can be introduced from the demonstration base or bred by wild flies. The method is to breed maggots into pupae or to sterilize the pupae dug up, and then select the plump ones (not big-headed flies) and put them into the breeding cage to hatch into sterile fly seeds.

4. Feeding method. The purpose of cage breeding is to let female flies lay eggs in a concentrated manner. There are four trays or tanks with different functions in the cage: the first is the water tray: it is used to provide drinking water for the flies, and it is changed every day. The second is the food tray: it is a nutritious food made of sterile maggot pulp, brown sugar, yeast, preservatives, and water, and it is changed every day. The third is the egg-laying tank: the tank is filled with a mixture of bran, water and attractants to lure female flies to lay eggs in a concentrated manner. The feed and eggs are moved into the larval breeding basin every day and replaced with new feed. The fourth is the eclosion tank: it is used to place the eclosion pupae when changing generations.

6. Elimination of breeding flies. Implement the all-in, all-out breeding method, that is, all 20-day-old breeding flies are killed, and then processed into fly powder for use. The fly cages are disinfected and then used to breed the next batch of new breeding flies.

3. Breeding technology of fly maggots

1. Maggot breeding room. Similar to the fly breeding room, the room temperature is maintained at 26-35 degrees Celsius, the humidity is 65%-70%, and there are maggot breeding racks, maggot breeding basins, thermometers and humidity meters, as well as heating facilities. Larvae are afraid of light and do not need light.

2. Breeding method: First, fill the maggot breeding basin with a 5-8 cm thick mixed feed made mainly of poultry and livestock manure, with a humidity of 65%-70%. Then, add 1 gram of fly eggs per 1 kg of food. After 8-12 hours, the eggs will hatch into maggots. Every 1 kg of pig manure can breed 0.5 kg of maggots.

3. Separation of maggots and feces. After 5 days of rearing, maggots are mature. Except for those that need to be turned into pupae for seed, the maggots used as feed should be collected and used. The method is to use the "strong light screen method" or "hypoxia method" to force them to escape from the food for separation. The remaining maggots after fresh feeding are dried and processed into maggot powder, which can be used as a substitute for fish meal to prepare mixed feed for pupae selection. After the maggots turn into pupae, use a screen to separate the pupae material, and then select the large and plump ones for seed. The pupae that are not used temporarily can be stored in the refrigerator for 15 days. In winter, the seed pupae should be moved indoors to keep warm for the winter.

The process of breeding flies with pig manure

4. Process of breeding flies with pig manure

1. Put the maggot larvae into the pond: use 100 kg of fresh pig manure, squeeze 20 kg of manure, squeeze the manure according to the humidity ratio of the pig manure, stir evenly, rake 1.5-2 square meters, and gently sprinkle the maggot seeds on the base material (in winter, squeeze the manure and spread it about 3 centimeters to keep warm).

2. Add fresh pig manure to the maggot pool twice a day for three consecutive days, and prepare for separation on the fifth day. Loosen the manure and maggots in the maggot pool, dry them, and start separating pig manure from maggots on the sixth day.

3. Separation of fly maggots: There are many methods for separating fly maggots: separation by strong light irradiation, water separation, feeding separation, strong light screen separation and manual operation separation. We generally adopt the manual separation method, because fly maggots have the characteristics of negative phototropism and like to drill into the matrix. The breeder can use a broom to peel off the surface pig manure layer by layer, and then a large number of maggots can be obtained at the bottom layer, and finally filtered with a ten-mesh filter.

4. After the fly maggots are collected, they are cleaned, disinfected and microwave-dried (4 catties of fresh maggots can be dried into 1 catties of dried fly maggots). Refined feed protein is widely used in animal husbandry and aquaculture. It is a high-quality, high-protein professional breeding feed, filling the gap in fly maggots as animal protein at home and abroad.

5. The moisture content of fresh pig manure produced by the pig farm every day is about 85%. After five days of biological transformation and consumption by maggots, the moisture content of the pig manure is reduced to about 50%, which greatly shortens the water evaporation and pig manure fermentation cycle.

6. Because about 10% of the maggots cannot be completely separated during the separation process, it has a certain protein content, which increases the nutrient concentration of organic matter by 72.21%, arsenic by 1.0, chromium by 23.2, cadmium by 0.25, mercury by 0.24, pH by 7.7, total nitrogen by 2.44%, and total phosphorus by 4.22%. After a second fermentation, the high-quality organic compound fertilizer produced through processes such as drying, baking, and granulation has reached the national crop ecological standards.

5. Precautions for fly breeding

1. Do not cut off water or food, otherwise it will have a serious impact on the fly's egg-laying and even cause the fly's death.

2. The temperature and humidity in the fly room must be controlled, the fly net and feeding trough must be clean, and the room must be ventilated.

3. Non-staff members are strictly prohibited from entering the fly house to prevent infection by germs.

4. Staff members are not allowed to use insecticides such as fly killers at home to prevent flies from chronic poisoning and death.

5. Fly breeding technology?

The growth process of flies is divided into four stages: eggs, maggots (larvae), pupae, and flies (adults). The following mainly discusses the first three stages.

1. Eggs: After the flies hatch, they will be raised by humans for 3 to 5 days before mating, reproduction and egg laying. The egg-laying period is 5-10 days. The egg-laying feed must be fermented in advance, and the moisture content and ratio must be controlled. After the fly eggs are extracted, they are immediately placed in the hatching room for hatching. The temperature, humidity and ventilation time of the hatching room are adjusted according to the season. The hatching time of the fly eggs is generally 8-24 hours. After hatching, they can be prepared for breeding in the fly maggot pool.

2. Maggots (larvae): seeding is distributed according to the density of hatched larvae (Note: if the larval density is too small, the larvae will grow large, but the yield will be too low. If the density is too large, the nutrition will be insufficient and the maggots will become smaller). Requirements for the ratio of the base material for seeding in the maggot pool (the moisture content of fresh pig manure should not be too much or too little. If the base material is not properly controlled, it will seriously affect the development and growth of the larvae and even cause death). Maggots mature in about 4 days in summer and about 6-8 days in winter. According to the current maggot breeding technology, maggots can be bred all year round.

3. Pupa: When the fly maggots mature, they crawl into a drier environment, shrinking back and forth to become pupae. Their body color changes from light to dark, and finally to chestnut brown. It takes 2-4 days for the maggots to become pupae. The large maggot pupae can be kept as seeds to ensure the reproduction rate of the next generation and extend the egg-laying period, so as to achieve a cycle of breeding.

6. How to raise sterile flies?

1. Breeding of Flies

1. Fly breeding room

The indoor air must be fresh, the temperature must be maintained at 24-30℃, the relative humidity must be 50%-70%, and there must be more than 10 hours of light a day. The room must be equipped with fly cages, cage racks, thermometers and hygrometers, as well as heating, exhaust, and escape prevention equipment.

2. Fly cage production

Use thick iron wire or bamboo strips to make a square fly cage with a length, height and width of 50 cm each, and cover it with plastic mesh. Leave a 20 cm diameter operation hole on one side, sew a 30 cm long cloth tube to the hole, and tie it tightly at ordinary times. Put three layers of fly cages on the cage frame, and each cage can raise 10,000 to 15,000 breeding flies.

3. Source of fly species

The first batch of sterile flies can be introduced from the demonstration base or bred by wild flies. The method is to breed maggots into pupae or dig up pupae and sterilize them, then select the big and plump ones (not big-headed flies) and put them into the breeding cage to eclode into sterile fly seeds.

4. Feeding methods

The purpose of cage culture is to allow female flies to lay eggs in a concentrated manner. There are four types of trays or tanks with different functions in the cage:

(1) Water tray, which is used to provide drinking water for flies and is changed once a day;

(2) Food trays, which are made of nutritious food made of sterile maggot slurry, brown sugar, yeast, preservatives, and water, and are changed once a day;

(3) Egg-laying tank, which contains a mixture of bran, water and attractants to induce female flies to lay eggs in a concentrated manner. The feed and eggs are moved to the larval culture basin every day and then replaced with new feed;

4) The pupae that are about to emerge are placed in the hatching tank.

5. Fly elimination

The all-in-all-out breeding method is implemented, that is, all 20-day-old breeding flies are killed and then processed into fly powder for use. The fly cages are disinfected and then used to breed the next batch of new breeding flies.

2. Maggot breeding

1. Maggot Breeding Room

Similar to the fly breeding room, the room temperature is maintained at 26-35℃, the humidity is 65%-70%, and there are maggot breeding racks, maggot breeding basins, thermometers and humidity meters, heating and other facilities. The larvae are afraid of light and do not need light.

2. Feeding methods

The maggot breeding basin is first filled with a 5-8 cm thick mixed food made mainly of poultry and livestock manure with a humidity of 65% to 75%. Then, 1 gram of fly eggs is added for every kilogram of food. After 8 to 12 hours, the eggs will hatch into maggots. Every kilogram of pig manure can breed 0.5 kg of maggots.

3. Maggot separation

The maggots mature after 5 days of rearing. Except for those that need to be preserved for seed and transformed into pupae, the maggots used as feed should be collected and used by using the "strong light screen method" or "hypoxia method" to force them to escape from the food and separate them. The excess maggots after fresh feeding can be dried and processed into maggot powder, which can replace fish meal to prepare mixed feed.

4. Selection of pupae

After the maggots turn into pupae, use a sieve to separate the pupal material, and then select the large and plump ones for seeds. The pupae that are not used temporarily can be stored in the refrigerator for 15 days. In winter, the seed pupae should be moved indoors to keep warm over the winter.

3. Benign ecological breeding

At present, breeding fly maggots to feed livestock, poultry, fish, frogs, turtles, etc. has achieved good results in various places. This base adopts a benign ecological cycle model of planting Russian fodder vegetables to feed rabbits, pheasants, black chickens, and chickens, using rabbit manure to raise maggots, and then using fly maggots to feed chickens and scorpions, and then using the leftovers from breeding fly maggots to plant Russian fodder vegetables, which has achieved good results.