How are maggots farmed? Generally, cage rearing is used without polluting the environment

AbstractConstruction of the farming site: use an old house converted into a seed fly room, with an area of 20-40cm being suitable, install escape-prevention facilities, place rearing racks inside the seed fly room, make fly cages from nylon gauze, fix them on the rearing racks, build a windproof and waterproof maggot-breeding greenhouse, and build rectangular cement ponds for raising maggots. Maggot farming: put the emergence trays containing fly seeds into the fly cages, provide sufficient water and feed, place egg-collection blocks on the 4th day after emergence, collect the egg blocks, then put them into the maggot-breeding room for cultivation.

I. Construction of Farming Facilities

1. Seed fly room

Specially used for rearing adult flies, with the area controlled at 20-40 sq m; an old house can be used for conversion, and screen doors and screen windows should be installed indoors to prevent adult flies from escaping; if farming in winter, heating equipment should be provided in the room.

2. Fly cages

Fly rearing generally adopts cage rearing, which not only occupies little space but also does not pollute the environment. A two-tier rearing rack can be made of wood inside the seed fly room, and each tier holds a fly cage made of nylon gauze. Fix the fly cage on the rearing rack like hanging a mosquito net. The cage length of 100cm, width of 40cm, and height of 80cm is suitable, and the cage should be equipped with a feed tray, drinking water tray, emergence tray, and egg-collection tray.

3. Maggot-breeding room

Used for rearing maggots kept for breeding, with the room temperature controlled at 20-28°C and the humidity controlled at 65-70%; the room should be equipped with multi-tier rearing racks, maggot-breeding basins, heating equipment, etc. on both sides, with an aisle left in the middle for a person to walk.

4. Maggot-breeding greenhouse

Specially used for breeding maggots used as protein feed; it only needs to be built as a simple shed that is windproof and waterproof; the maggot-rearing pond is best made as a long strip pond or a small-area rectangular pond.

II. Maggot Farming

1. Seed fly breeding

Put the purchased fly seeds into the emergence tray; generally 10,000 fly seeds weigh about 150g; an emergence tray 40cm long, 30cm wide, and 8cm high can hold at most 750g of fly seeds.

2. Pupae hatching

Put the emergence tray containing the fly seeds into the fly cage and tie the working opening tightly; as long as the temperature is kept at 25-30°C and the humidity is kept at 50-80%, generally after 3-4 days, the fly seeds can emerge into flies. If the winter temperature is relatively low, then the heater fan needs to be turned on to raise the temperature, at about 36°C, and after about 2 days the fly seeds can emerge into flies.

3. Seed fly rearing

When flies begin to emerge, feed trays and water trays should be placed; milk powder and sugar in equal halves can be fed to the flies to ensure they have enough protein, sugar, and water to maintain life and reproductive capacity.

4. Egg block collection

On the 4th day after adult emergence, the flies will mate, and on the 5th day they can lay eggs; therefore, on the 4th day, egg-collection materials should be placed into the fly cage in time to lure the flies to lay eggs.

5. Maggot breeding

Take the collected hard eggs to the maggot-breeding room for cultivation; as long as the temperature and humidity are suitable, plump and large maggots can be bred.

III. Maggot Feed

1. Maggot breeding: fresh pig manure 80%, wheat bran 10%, peanut residue 10%.

2. Egg collection: fresh pig manure 80%, wheat bran 10%, peanut residue 9.5%, ammonium bicarbonate 0.5%.

3. Seed flies: water 84.6%, brown sugar 5%, milk powder 5%, fresh eggs 5%, vitamin C 0.2%, methionine 0.2%.