CATDOLL : CATDOLL: Illustration of the whole process of fly breeding technology (illustration video of the whole process of fly breeding technology)

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. Red-headed blowfly breeding

On a sunny day when the outdoor temperature is stable above 27℃, first take 10kg of fresh pig manure/2kg of bran/2kg of pig blood/0.3kg of EM effective microorganisms (which can reduce or eliminate the odor in the manure pile and have a bactericidal effect, otherwise the breeding environment will be very bad, but do not use excessive amounts) and mix them into fly maggot breeding feed and put them into a maggot breeding pool in the fly maggot breeding room.

The maggot catching device made of screen cloth is used to catch maggots from the toilet. The maggots are first cleaned in a pond or running water, and then quickly poured onto the prepared fly maggot breeding feed. The fly maggots will immediately drill into the feed.

After 2-3 days, all the maggots will grow up and mature, and then they will automatically separate and fall into the maggot collection bucket. Put the collected mature maggots in a large plastic basin, sprinkle a little wheat bran on it, and cover the maggots with a woven bag (note that it should not be covered on the edge of the plastic basin. If the woven bag is covered on the edge of the plastic basin, water vapor will be generated in the basin, and the maggots can escape from the basin).

After 2-3 days, all the maggots have turned into red pupae. Use a sieve to remove the bran, and disinfect the pupae with potassium permanganate solution (10 kg of clean water/7 g of potassium permanganate) for 10 minutes. Take out the disinfected/sterilized pupae, spread them out to dry, put them back into the plastic basin, sprinkle a little bran on them, and cover them with a woven bag to let the pupae hatch.

Three days later, the pupae hatch into a large number of flies.

Place the food for the flies on the edge of the hatching basin so that the flies can eat as soon as they hatch.

3. 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.

4. 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.

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 engineered flies?

The breeding process of this fly is divided into four stages: eggs, maggots (larvae), pupae, and flies (adults).

First, 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 plump ones (not big-headed flies) and put them into the breeding cage to hatch into sterile fly species.

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.