Vietnamese farmer Pham Van Khui spent five years breeding what has been called the black water fly "black fly", with an annual income of more than 300,000 yuan, known as the local rich master.
Fan Wen closed five years ago from agricultural school, before he had farmed snake worms. Five years ago, he learned that farming black water fly is very profitable, so he used his 500 square meter flat bottom to build 32 breeding cages to breed black water fly. In order to better breed, many fans are installed on the ceiling of the farm to ventilate and balance the temperature with the external environment.
The cages are designed with mosquito nets that cover 10 to 30 square meters and are always closed so that they do not fly out. Each cage released about 100,000 flies.
Black water flies are a scavenger insect of the diptera hydra family, and their growth and development are divided into egg stage, larval stage, pupal stage and adult stage. The larvae feed on decaying organic matter and animal feces in nature; adults are like flies, but larger than flies, generally have a lifespan of no more than 10 days, feed on nectar and dew, and lay an average of about 1,000 eggs.
Black water fly can eat 24 hours a day when food is sufficient, and the feeding efficiency is very high. It can effectively dispose of common organic wastes such as dead fish, rotten fruit, pig manure, and leftover meals.
Black water fly larvae can also be directly fed as feed to chickens, fish and other economic animals, because its larvae can survive in the water, it is a rare live bait for aquaculture.
This "black fly" is ugly but expensive, and Vietnamese farmers earn 300,000 yuan a year by raising it.
Black water fly has fast growth rate, strong reproductive and regeneration capacity, high food conversion rate, large-scale breeding benefits are very good, Pham Van Khu currently relies on aquaculture income of up to 100 million yuan (about 29,000 yuan) per month, with an annual income of more than 300,000 yuan.