Aseptic culture technology of fly maggots

With the rapid development of aquaculture, the demand for high protein feed is increasing. Artificial breeding of sterile maggots opens up a new way for the development and utilization of high protein feed for animals.

12,000 sterile fly species are raised in one cubic meter in multiple boxes, only 20 grams of milk powder are eaten every day, the eggs laid every day are placed in 4 kilograms of wheat husks for cultivation, and the insects can be taken to feed frogs, frogs, catfish, gecko, scorpions, etc. on the fourth day of cultivation, and the insects are used every day. 12,000 fly species can lay more than 2 kilograms of insects every day in one cubic meter, and the insects produced on the first to fifth days of normal laying can reach 5 to 6 kilograms per day. The equipment is simple and convenient. Only 6 meters of fish net to do a cage, more than ten plates can be prepared for mass production, very easy to raise, a single introduction can be self-breeding expansion.

1. Living habits of houseflies

Musca domestica develops from soft to hard, from beige, light brown, dark brown to black after five days at room temperature of 20℃~30℃ and relative humidity of 60%~80%. Finally, the adult flies hatch from the front of pupae. The adult flies that just crawled out could only crawl, not fly. An hour later, they spread their wings and began to eat and drink. Adult flies are active during the day and immobile at night. After three days, they mature sexually and begin to mate and lay eggs. The peak period of laying eggs is from 1 to 8 days old, and they basically lose the ability of laying eggs at 25 days old. Fly eggs hatch into maggots in half a day to one day, maggots are cultivated in pigs and chicken manure, and generally pupate on the fifth day. A generation of flies lasts about 28 days. The temperature and nutrient of erbium have great influence on the growth and development of maggots. Generally, the room temperature is in the range of 20~30℃. The higher the temperature and nutrient, the faster the maggots grow and develop, and the larger the pupae become.

II. Breeding of breeding flies

Flies should be kept in the fly house. The size of the fly room, according to the need to build, can also be used to modify the old room, doors and windows installed glass and screens, in order to adjust the temperature, installed fans on the wall to adjust the air. There should be heating equipment in the room to keep the winter temperature at 20℃~32℃ and the relative humidity in the room at 60%~70%. A black curtain was placed on the passage at midnight to prevent flies from escaping. Room equipped with feeding rack, divided into upper, middle and lower three layers. The feeding rack is made of iron or wood. Fly cages made of nylon gauze nets are placed on each shelf, the cage length is 100 cm and the height is 80 cm, the breeding flies are kept in the cages, 12,000 breeding flies are kept in each cage, cloth sleeves are added to each cage for feeding, adding water and collecting eggs, 12,000 adult flies are fed 20 grams of milk powder every day, the feed is placed in a feed basin with gauze pad surface, and the adult flies are allowed to stand on gauze to suck the feed and water once a day. Put gauze into the basin, put wet wheat husk into the spawning tray for flies to lay eggs, collect eggs from the fly breeding intelligence once a day, and send them to the maggot room for breeding maggots. The number of eggs laid by seed flies was the most from 8:00 to 3:00 every day, and the time of egg collection should be appropriate. Each batch of flies will be eliminated after 15~20 days of breeding. Kill it with hot water or steam, dry it and grind it into livestock feed, and then replace it with a batch.

III. Culture of maggots

The maggot breeding can be carried out by using bricks with a side height of 20 cm and an area of 1 - 3 square meters, or by using plastic plates for breeding maggots on wooden frames. A plastic plate with a diameter of 50 cm can breed maggots 1.5 kg only by 3 kg of wheat husk, which can be collected and utilized after 3 - 4 days of cultivation. The maggot breeding materials have a wide source, and the cost of different maggot materials is different, so they can be reasonably selected. Wheat skin nutrition extremely high human body each class slightly higher, generally used to breed flies, low-cost wine trough, bean dregs and so on can be used as commodity maggot bead material. If wheat husk is used as maggot material, generally 1 kg wheat husk can produce 0.5 kg fly maggot. When using, add water and mix well. The humidity is squeezed by hand. It is appropriate to disperse when touched. If there are semi-dry dry and wet materials such as wine tank and bean dregs, they can be cultured without adding water. Specific maggot breeding operation method: fly eggs and wheat skin material into the plate, add wine trough, bean dregs or wheat skin maggot material, slightly mixed can be. Note that fly eggs should not be exposed on the surface of maggots, so as not to lose water and omit. The thickness of maggot material is based on the standard that the fermentation temperature in maggot material is not higher than 40 and not lower than 20, generally 5~10 cm. The maggot material should be thinner in summer when the temperature is high, and the maggot material can be thickened appropriately in winter when the temperature is low. If the human and animal feces are used after killing bacteria and parasites, the ratio of maggot material to maggot material is as follows: chicken manure is generally 3.5~4 kg to produce 0.5 kg fresh maggot. No matter what kind of raw material is used to raise maggots, the humidity of maggots should be controlled at 60%~65%.