Four concentrations of Ascobein foliar fertilizer were used for treated mulberry leaves. Treated leaves used for fed silkworm, Bombyx mori L. larvae during first, first and second, young instar, first to fourth instar and during whole instars. Data were collected for economic traits of whole larval duration (LD), fifth larval instar duration (FD), larval mortality (MP), cocooning percentage (CP), pupation ratio (PR), number of cocoon per liter (C/L), double cocoon percentage (DCP), cocoon crop by number (Crop/No) and weight (Crop/W). Also data of cocoon weight (CW), shell weight (CSW), pupae weight (PW), cocoon shell ratio (CSR), silk productivity (SP) for males and females. Results reveal that, A₄ concentration is the best concentration, treatment G₅ is better treatment. The treatment G₅ with concentration A₄ is the best. It is recommended that, using Ascobein fertilizer for traditional rearing, rearers used mulberry leaves from hug trees that doesn't provided by fertilizers and manure, as well as in case of insufficient of shortage of fertilizers. Also, it is safe to sprinkle Ascobein on mulberry plant and collected the leaves for feeding larvae. So, one of the best alternative solutions is using Ascobein foliar fertilizer in cases of traditional rearing and shortage in fertilizers.