Enhancing Food Production by Sustainable Cricket Farming in Thailand: Evaluating Black Soldier Fly Larvae as a Cost-Effective Feed Ingredient

The high cost of commercial feed presents a major barrier to scaling environmentally responsible cricket (Acheta domesticus) farming, particularly in low-resource settings. We investigated the use of Hermetia illucens (Black Soldier Fly Larvae, BSFL) combined with locally available ingredients to develop affordable, nutritionally balanced feed for A. domesticus. A three-phase experimental approach was used: (i) feed preference assessment from six ingredients; (ii) performance evaluation of four BSFL-to-commercial feed ratios; and (iii) formulation and testing of three practical recipes using Pearson’s square method. Feed efficiency was measured via feed conversion ratio (FCR), efficiency of conversion of ingested food (ECI), and yield. A recipe consisting of 20.6% BSFL, 14.6% soybean meal, 29.1% corn meal, 17.8% rice meal, and 17.8% commercial feed achieved the best performance with an FCR of 2.2, ECI of 44.4%, and juvenile larvae yield of 99.9%. This formulation also reduced feed cost by 33% compared to commercial feed. The study confirmed that integrating BSFL with regionally sourced materials using a simple feed design method can enhance food security, reduce input costs, and support the transition toward circular insect farming systems.