The main protein component of 91.8ku extracted from Musca domesticalarvae was degraded into smaller peptides which molecular weight was from 4.3to 65.9ku after fermentation by Aspergillus oryzae and the mass concentration of peptides in fermentation liquor was 7.9mg/mL,the conversion rate was 31.6%.Male and female Drosophila melanogaster was divided into four groups randomly and fed with culture media containing 0,1%,2%,4% of the peptides lyophilized powder.The death number and the survival days of D.melano...