“Green synthesis of silver nanoparticles from flower extract of Hibiscus rosa sinensis and its influence on growth parameters of silkworm (Bombyx mori)”

This study presents the sustainable green synthesis of silver nanoparticles (AgNPs) utilizing Hibiscus flower extract as a dual-functioning reducing and capping agent. Green synthesis was performed using an aqueous solution of ( Hibiscus rosa sinensis ) petal extract and AgNO3(1). Comprehensive physicochemical characterization via X-ray diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), and SEM-EDS confirmed the crystalline nature, nanoscale size, and organic phytocompound capping of the AgNPs.(2) Key FTIR absorption bands indicated the successful integration of phenolic and carbohydrate residues on nanoparticle surfaces, while XRD patterns revealed face-centered cubic crystalline domains.(3) To evaluate the biological efficacy of these biogenic nanoparticles in sericulture, silkworm larvae were fed with three distinct diets: (1) deionized water-treated mulberry leaves, (2) Hibiscus extract-treated leaves, and Hibiscus-AgNP-treated leaves. Quantitative analysis revealed that Hb-AgNP supplementation at optimal concentrations significantly enhanced larval survivability (up to 96.7%), larval and cocoon weights, and shell yield when compared to control and conventional extract groups. (4)These improvements were achieved without imparting any observable toxicological effects at effective dosages. (5) This research demonstrates not only the scientific and agronomic value of phytochemical-driven, green nanoparticle synthesis but also its potential to sustainably bolster productivity in silk farming, providing an environmentally responsible alternative to conventional feed additives.Silkworms (Bombyx mori) are an important economic insect and a tool to convert leaf protein into silk protein. Due to its evocative physical and chemical properties, silver was of particular interest for this process.(6) A fixed ratio of metal ions to petal extract was prepared, and the color change observed demonstrated nanoparticle formation. The nanoparticles were characterized using FTIR, XRD, SEM, and a UV-visible spectrophotometer. Biogenic silver nanoparticles (AgNPs) significantly influence the physiological parameters of silkworms (Bombyx mori). Additionally, they can improve larval weight and cocoon quality at moderate doses, but excessive exposure has detrimental effects.