Insects are novel and sustainable sources of protein. Black soldier fly larvae (Hermetia illucens, BSFL) are the most important farmed insect species. This review focuses on the effects of BSFL meal inclusion on the growth, gut health and immune function of pigs. In all age groups, BSFL meals can support comparable feed intake, nutrient utilisation and growth performance replacing conventional protein sources. The bioactive compounds of BSFL (chitin, lauric acid and antimicrobial peptides) can enhance the health of pigs. Due to the varying origins and chemical compositions of BSFL meals, it is challenging to determine an optimal inclusion level. The application can be especially advantageous in weaned pigs to reduce diarrhoea, in which condition BSFL meal may contribute to decreasing the application of antibiotics. BSFL inclusion may also improve meat quality and carcass yields, but due to higher feed intake, the cost of application is higher for growing and finishing pigs. As BSFL meals have non-standard nutrient content and bioactive compound concentrations, for optimal results, it is advisable to determine the mixing ratio based on the source of the insect meal and the farm conditions.
Nikoletta Hetényi (Thu,) studied this question.