Black water fly (Hermetia illucens L.), saprophytic water fly insects, can eat livestock manure and domestic garbage, produce high-value animal protein feed, because of its rapid reproduction, large biomass, wide range of food, high absorption conversion rate, easy to manage, low feeding costs, good animal palatability and other characteristics, so as to carry out resource utilization, its larvae are called "phoenix worm", become with the fly maggots, mealworm, barley worm and other resource insects, in the world has been promoted. Native to the Americas, it is currently widely distributed throughout the world (between 40 degrees north and south latitudes). In recent years, it has been introduced to China and has been widely distributed in Guizhou, Guangxi, Guangdong, Shanghai, Yunnan, Taiwan, Hunan, Hubei and other places. At present, it is widely used in the treatment of chicken manure, pig manure and kitchen waste. Among them, Shandong Kemaira Agriculture has become the leader of the development of China's black water fly industry. Development and utilization of black water fly larvae Black water fly has a variety of important uses, which can be developed and utilized in the following aspects.
1, nutritional value utilization: black water fly larvae and pupae have high nutritional value, rich in essential amino acids, trace elements and other nutrients, the fat content in its fat is also very rich, can be the larva and pupa dried after grinding into powder, as a feed additive for livestock and poultry. Among the dry matter of the black water fly larvae, the crude protein content is about 42.1%, the fat content is about 34.8%, the crude fiber is 7.0%, and the ash content is about 16.1%. Moreover, the content of amino acids and calcium is also very high. According to studies, the amino acid content of black water fly larvae is similar to that of herring meal, which is superior to ordinary bean meal and bone meal, and is particularly suitable for the breeding of chickens, pigs, bullfrogs and fish. It is also possible to isolate the fat, chitin and protein in the black water fly larvae and pupae, and the obtained fat and chitin are important industrial raw materials, and the insect protein that separates the fat and chitin will also improve the feed advantage.
2. Transform livestock and poultry manure: Black water fly larvae feed on animal manure, and can use it to treat animal manure. With the development of China's aquaculture industry, livestock and poultry manure pollution has become a serious environmental problem. As an important resource insect, the black water fly has a very ideal effect in transforming livestock and poultry manure, and can effectively remove the odor in livestock and poultry manure. The pig manure treated with black water fly reduced nitrogen by 55.1%, phosphorus by 44.1%, potassium by 52.8%, calcium by 56.2%, magnesium by 41.2%, and sulfur by 44%. 7%, copper decreased by 45.8%, etc. In this way, through the feeding of black water fly larvae, it not only effectively solves the accumulation of livestock and poultry manure, greatly reduces the pollution of manure to the environment, but also increases the income of farmers and brings good economic and social benefits. In addition, the fecal residues eaten by the larvae of black water fly contain a large amount of humic acid, which is an excellent solid organic fertilizer and a good material for raising earthworms and red worms.
3. Forensic application: Using the growth and development law of black water fly, the death time and death period of the corpse can be judged, and the reference index is provided for forensic identification.
4. Inhibit the reproduction of flies: The black water fly has similar living habits to the fly, but the black water fly does not like to be close to humans, usually inhabits the green bush, and does not have the habit of entering the human room. The increase in the number of black water flies can effectively inhibit the reproduction of flies, eliminate pathogenic microorganisms, and purify the human living environment.