CATDOLL : CATDOLL: How to raise maggot flies using chicken, duck and pig manure?

How to raise maggot flies using chicken, duck and pig manure?

Fly maggots are a good feed animal. Chicken, duck and pig manure contain more nutrients and have a strong odor, which can attract flies. They are good raw materials for cultivating fly maggots, especially chicken manure. Now we will introduce a simple method of raising maggots using chicken manure as an example.

(1) Preparation of maggot pool

Because adult flies are attracted to light and maggots are afraid of light, indoor and outdoor places that are not exposed to sunlight should be selected. In order to better attract breeding flies, it is best to set it up outdoors, near chicken coops and pig houses. The ground is flat, but slightly sloped to avoid water accumulation. Use bricks to build a rectangular or square maggot pool. Each maggot pool is about 1 square meter. The depth is 40 to 50 cm. First, lay mortar on the bottom, and then the bottom and the inner and outer walls are all coated with cement. There are small drainage ditches around the outer wall to prevent rainwater from flowing in. Build a rain and sun shed on the pool to prevent rainwater from falling in and direct sunlight. See Figure 27, a simple maggot breeding facility.

Figure 27 Simple maggot breeding facility

5a. Rectangular fly entrance sleeve 5b. Circular fly entrance sleeve 1. Maggot pool 2. Adult fly cover 3. Fly and maggot culture medium 4. Adult fly entrance 5. Entrance sleeve 6. Fly cover bottom opening

(2) Production of escape-proof cover

Use bamboo strips, wooden strips and window screens to make it according to the above picture. The top of the anti-escape cover must be equipped with an inverted cuff that allows the adult flies to enter but not exit. The inner surface of the three sides of the bottom edge is made into a sub-opening so that the anti-escape board can be inserted when the fly cover and the adult flies inside are moved at the same time.

(3) Preparation of culture medium

This simple method uses the same pond to raise flies and maggots, so the different feed requirements of flies and maggots must be taken into account. Take fresh chicken manure and pour it into the maggot pond, mix it with minced dead fish or animal viscera, bran and a small amount of slaughter blood, and stir it into a non-flowing thick paste with a water content of 65% to 70%. The pH value of the culture medium is 6.5 to 7.5, which can be adjusted with quicklime and vinegar. Then add a small amount of ammonium carbonate solution. The smell of this culture medium is very easy to attract flies and is rich in nutrients. After mixing well, spread it on the bottom of the pond with a thickness of about 20 to 30 cm. Hang an enamel tray in the cover, add a small amount of cold water every day, and the water depth is about 0.5 to 1 cm for adult flies to drink.

(4) Collecting fly species

After the culture medium is prepared, sprinkle lime powder on the top surface of the maggot pool wall and cover it with an escape-proof cover; the bottom edge of the cover must be sealed with lime powder to prevent fly maggots from escaping and polluting the environment. When there are an average of 50 to 100 flies per square decimeter (10 cm × 10 cm), the entrance can be sealed. This density can usually be reached in about two days in summer.

(5) Cultivation of flies and maggots

The main work in the management of fly maggots is to control the temperature, humidity and light. The optimum temperature of flies and maggots is slightly different. The optimum air temperature for flies is 24-32℃, and the optimum temperature for maggot culture medium is 30-35℃, which are essentially the same, because the air permeability of the latter is far less than that of air, and the heat generated by the aggregation of maggots and the heat generated by the mild fermentation of the culture medium. Therefore, just control the air temperature at 24-32℃. When the temperature is too high in summer, shade is used to adjust it. The humidity problem has been solved by adjusting the culture medium and hanging drinking water trays. Flies like light, but do not like strong light from direct sunlight. Maggots avoid light, so shade can also be used to adjust it.

(6) Collecting maggots

When the temperature is between 24 and 30℃, female flies can lay eggs for 15 to 20 days, 4 to 5 times in one life cycle, and once every 5 days on average. Under suitable nutrition and temperature conditions, maggots develop after 4 to 5 days, and begin to pupate after two molts. Therefore, in order to collect active maggots for feeding bullfrogs and other aquatic products that like to eat live food, maggots are generally collected five days after the adult flies reach the density requirement. Before collection, the fly cover and the adult rope inside must be moved to another maggot pool at the same time to continue feeding and laying eggs. Generally, it can be used continuously for 2 to 3 times. Prevent adult flies from escaping during the move, as shown in Figure 28. One person (A) holds one end of the new fly cover close to one end of the original rope cover, and the other person (B) holds the other end of the original cover. A pushes the new cover forward, and B slowly pushes the escape prevention board as the original cover is moved out. During the whole moving process, Person A pushes to ensure that the ends of the two covers are close together, while Person B only controls the original cover to prevent it from deflecting and to prevent any gap between the bottom of the fly cover and the wall of the maggot pool. At the same time, Person B pushes up the anti-escape board at the same speed until it is completely closed. When the new cover completely covers the maggot pool, the anti-escape bottom board is completely pulled out to allow the remaining adult flies to enter the new cover. It is impossible to remove all the adult flies at once, so the same method can be used to move them one or two more times. The eliminated adult flies can be killed with insecticide spray.

Figure 28 Schematic diagram of moving adult flies

Remove the fly cover to collect maggots. Because maggots avoid light, you can open the sunshade and the maggots will drill into the culture medium. Use a small manure shovel to shovel the upper culture medium. Repeat this several times and the maggots will be concentrated in the bottom layer of the pond. If it is used directly for aquatic products, the maggots and the remaining culture medium can be put into the fish pond together. If you want to get pure maggots, you can first use a slightly finer sieve to sieve out the fine culture medium, and then use a slightly coarser sieve (about 16 meshes) to sieve out the maggots, and pour out the crude fiber of the culture medium on the sieve. Generally, 100 kg of fresh chicken manure can produce 10 to 15 kg of fresh maggots.

How to quickly raise fly maggots, mainly for feed, requiring simple operation, fast speed and high yield

The specific method is as follows:

1. Cultivation tools: General household plastic basins, plastic buckets and other containers can be used, the four walls must be relatively smooth, and the depth of the basin must be greater than 25 cm.

2. Selection and preparation of egg-sucking materials and collection and cultivation of fly eggs. If there is fresh chicken manure, you can directly use fresh chicken manure as egg-sucking materials to collect fly eggs. The method is: put fresh chicken manure in a basin. If the chicken manure is too dry, sprinkle a little water on it. Put it in a place where there are many flies in the wild. It should be placed in a cool place as much as possible. If the sun is too strong, use shade to shade it. Generally, flies will gather and lay eggs immediately after putting it in. Take back the egg-sucking materials every afternoon. You can see that there are clumps of fly eggs on the surface of the chicken manure. You should immediately cover it with corn manure or wheat bran mixed with water to ensure that the egg masses have a certain humidity. You can see many small maggots the next day, and you can raise them in separate basins. The method of raising maggots is to first spread about 3-5 cm thick wheat bran or corn flour mixed with water in the basin, and then put the hatched maggots together with the egg sucking material on the wheat bran or corn flour. After eating the egg sucking material, the maggots will quickly drill into the feed below. Under normal circumstances, they can grow into large maggots in 3 days. The powder used to raise maggots can be fermented or used directly. If rice bran is used to raise maggots, it must be fermented, and the rice bran must be of good quality. The "rice bran" that is completely rice husk is not effective in raising maggots. Fermentation can increase the yield of fly maggots. Generally, 1 catties of wheat bran can produce about 0.5 catties of maggots, and 1 catties of corn flour can produce 0.4 catties of maggots. The yield can be increased by about 1 times by adding waste such as pig blood. The powder mixed with water is easy to heat up, so the thickness of the powder in the basin should not be too thick to prevent the fly maggots from dying from heat. The maggot breeding pot should be placed in a place with higher temperature (25-30℃) but slightly dim light.

3. Cage management of flies. Using this method to collect fly eggs will not only not increase the number of wild flies, but also gradually reduce the number of flies in the wild if used for a long time. However, in some densely populated areas, in order to avoid causing people's disgust, especially if you want to use red-headed flies for breeding, you can keep the flies in cages. The specific method can be found in Appendix II, pages 34-36 of the third volume of the eel training materials.

4. Separation of fly maggots. There are several methods for separating fly maggots. (1) Separation between large and small basins. Place a smaller plastic basin inside a larger basin, wet the four walls of the small basin with a damp cloth, pour the maggots and feed into the small basin to a thickness of about 2 cm, and the fly maggots will crawl along the basin wall into the large basin. (2) Photo separation. Place a sieve with holes large enough for the maggots to drill through on a plastic basin, wet the maggot feed with water, and then pour it into the sieve. The thickness should not exceed 2 cm. Place it in the sun. Since the fly maggots are afraid of light, they will try their best to drill down and fall into the basin below. (3) If there is a maggot breeding room, pour it into the maggot breeding pool and let it separate automatically.

The waste from breeding fly maggots can be directly used for raising chickens, pigs, fish, etc. It is still a very good feed, and animals love to eat it.

Using this method, based on the calculation of using only fly maggots to breed yellow eels, generally about 7 catties of fresh maggots can make the yellow eel gain 1 catty, and the feed cost is not very high. Taking wheat bran as an example, 1 catty of fermented wheat bran can produce 1 catty of fresh maggots. Calculated at 0.7 yuan per catty of wheat bran, each catty of wheat bran can produce 0.4 catties of waste after producing fly maggots, which is worth 0.24 yuan as feed. The cost of 1 catty of fresh maggots is about 0.46 yuan, and it costs about 3.3 yuan to use pure maggots to make the yellow eel gain 1 catty. In addition, the yellow eel gains weight quickly and will not pollute the pond water, which is worthy of widespread use by many students. When fresh maggots are added to fish feed for feeding, the feed coefficient will be significantly reduced, and the breeding cost will be lower.