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The use of a feed containing soybean milk residue for improvement of growth in Protaetia brevitarsis
Insects are gaining recognition as an alternative source of protein. Moreover, Protaetia brevitarsis was listed as a general food ingredient by Korean Ministry of Food and Drug Safety. As a result, rearing insects has been growing in Korea and domestic farms have begun mass rearing of insects. In order to produce high quality insects, studies on the development of safe and nutritious feed sources are needed. Given the cost of rearing insects, agricultural and industrial by-products are good sources for feed. The efficient utilization of the by-product can help in reducing the cost of production and preventing environmental pollution. In this study, soybean milk residue was investigated for its effects on developmental characteristics of P. brevitarsis until larvae pupated. With three different kinds of feed on the larvae of beetles, the larvae with 10% of soybean milk residue showed the best result for the larval survival rate and growth rate of this beetle. In addition, the feed with 10% soybean milk residue had significantly shorter than control feed (only fermented oak sawdust). However, 20% of soybean milk residue decreased larval weight and extended larval development period. Therefore, we concluded that soybean milk residue were used as a nutritional feed source to promote larval growth and produce quality insects.
