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Techniques for raising sterile fly
Flies, once considered one of the "four pests" due to their role in disease transmission, have now found a new purpose in modern science and agriculture. With technological advancements, their remarkable reproductive capabilities and high nutritional value are being harnessed as a sustainable and high-protein feed source for livestock and aquaculture. Beyond animal feed, fly-based products are also being developed for medical, health, biochemical, and pesticide applications. Research has shown that dried fly larvae powder contains 59% to 65% crude protein, 12% fat, and 43.83% total amino acids—three times more than fishmeal. When combined with ingredients like fresh wolfberries, this feed has been proven to increase fish yield by 22%, boost chicken egg production by 17% to 25%, enhance pig growth by 19% to 42%, and reduce feed consumption by 20% to 25%. This article will walk you through the process of raising flies using aseptic cages.
**1. Fly Breeding**
To successfully breed flies, it's essential to maintain a clean indoor environment with a temperature between 24°C and 30°C, humidity between 50% and 70%, and at least 10 hours of light per day. Essential equipment includes fly cages, cage racks, thermometers, hygrometers, and proper ventilation systems to prevent escape.
The fly cages are typically square, measuring 50 cm in height and width, constructed from coarse iron wire or bamboo. The exterior is covered with a fine plastic mesh. One side has a circular opening (20 cm in diameter) that is 30 cm long and usually kept closed. Three cages can be stacked vertically, allowing each to house 1–1.5 million flies.
Sterile flies can be obtained from demonstration bases or cultivated from wild species. The process involves sterilizing larvae and selecting healthy, non-large-headed flies to place in the cages. The goal is to encourage females to lay eggs. Inside the cage, four types of devices serve different purposes: water trays for hydration, food trays with nutrient-rich mixtures, egg-laying cylinders with a bran-water attractant, and feathering cylinders to help emerging flies mature.
After 20 days, all flies are culled and processed. The cages are then disinfected before being used for the next batch.
**2. Cricket Breeding**
Cricket breeding requires a similar setup, with temperatures maintained at 26–35°C and humidity at 65–70%. The environment should include facilities for raising larvae, breeding pots, and heating elements. Crickets avoid light, so no lighting is needed during the larval stage.
A nursery bowl filled with 5–8 cm of mixed food, primarily composed of animal manure, is prepared. The mixture is moistened to 65–75% humidity, and 1 gram of fly eggs are added per kilogram of food. After five days, the crickets reach maturity. They are then separated from the food using methods like strong light screening or oxygen deprivation. The collected crickets are dried and processed into flour to replace fishmeal in feed formulations.
After grinding and sieving, only the largest, healthiest individuals are selected for seeding. For short-term storage, they can be refrigerated for up to 15 days. In colder months, they should be moved indoors to protect them from freezing.
**3. Sustainable Ecological Farming**
Today, many farms are successfully integrating fly maggot farming with livestock, poultry, fish, frogs, and even scorpions. This model creates a closed-loop ecological system. For example, fly maggots are used to feed rabbits and pheasants, while rabbit waste is used to fertilize crops. Fly maggots also serve as feed for chickens and scorpions, and the waste from the maggots is repurposed for growing fodder. This approach not only reduces waste but also enhances productivity and sustainability.
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Techniques for raising sterile fly