This study aims to determine the effect of substituting commercial feed with BSF maggot flour (Hermetia illucens) on the performance and productivity of laying quail. One hundred (100) 20 days-old laying quails with an initial weight of 2.9±8.26 g/head were divided into four treatments with five replicates per treatment using the completely randomized design (CRD). The treatments were T1 (0% BSF maggot flour as control), T2 (1.50% BSF maggot flour and 98.5% commercial feed), T3 (2% BSF maggot flour and 98% commercial feed), and T4 (2.50% BSF maggot flour and 97.5% commercial feed). The parameters measured were feed intake (g/head/mg), the body weight at first egg-laying (g/head), age at first egg-laying (days), the weight of first egg (g/grain), daily egg production (%), quail egg weight (g/item), and feed conversion ratio. The results showed that BSF maggot flour in commercial rations significantly affected feed intake (P0.05) on the body weight at first egg-laying, the age at the first egg laying, the weight of the first egg, daily egg production (%), egg weight (g/grain), and feed conversion ratio. This study shows that substituting 2% maggot BSF flour in commercial rations can increase feed intake and maintain egg production, weight, and conversion. Furthermore, giving BSF maggot flour to a level of 2.50% could not improve the body weight at the first laying of quail and the age at the first egg-laying.Keywords egg weight, feed consumption, feed conversion ratio, BSF maggo
