Influences Of Different Light Sources On The Life History Of The Black Soldier Fly And The Conversion Of Swine Manure By The Insect

Black soldier fly larvae could be used to deal with poultry facilities and reduce manure accumulation and its prepupa contains rich nutrient substances, especially the high protein content, which could be use as forage additives.However, rearing the black soldier fly in artificial condition would face a large problem that no or few mating occurred when in the day without sunlight. We used different luminaire (sunlight,quartz-iodine lamp and rare earth lamp) irradiating the black soldier fly adults to stimulate mating. The results showed that while the sunlight was replaced by the quartz-iodine lamp, mating activity could be observed and the fertile eggs could be collected as normol. The numbers of eggs collected were about 61% of that on sunlight. But no mating occurred when used the rare earth lamp to elicit the adults. The hatch, larvae and the pupal development of the black soldier fly collected from the sunlight and quartz-iodine lamp had on significant difference (P<0.05). The quartz-iodine lamp had no effect on the passage of the insect compare to sunlight by reared 3 generations (P<0.05). It would be useful in developing black soldier fly artificial rearing method during winter and cloudy day. It was the first report using the artificial light sources to elicit the mating activity of the black soldier fly successfully.We inoculated 10 days old larva to fresh swine manure in the study, the insect convert the nutritive material in the manure to its own protein and fat. During this process, the weight of the manure from 9.45 kg reduced to 5.98 kg, reducing the manure accumulation by 36.72%. The moisture of manure decreased from 67% to 63%, the total N reduced 31.58% and odour of the manure also reduced after the it digestion. And this management produced the pupae with high protein and fat. We analyzed the compound of fat acid in the pupa rear by swine manure through the gas chromatography-mass Spectrometry (GC-MS) to evaluate its nutritional ingredient as forage. The pupa are full with protein and fat, and its also have many different fat acids, lauric and palmitic acid were major in saturated fatty acid, reached 35.64% and 14.84%, respectively. The oleic acid was major in unsaturated fatty acid reached 23.62%. The ration of the saturated fatty acid and the unsaturated was 1.4:1. This result offered reference value for us to exploit the functionality fat acid of the black soldier fly.