Green synthesis of silver nanoparticles (AgNPs) using aqueous root extract of Delphinium denudatum (Dd)
by reduction of Ag+ ions from silver nitrate solution has been investigated. The synthesized DdAgNPs
were characterized by using UV–Vis spectroscopy, X-ray diffraction (XRD), Field emission scanning electron
microscope (FESEM) and Fourier transform infrared spectroscopy (FTIR). The prepared DdAgNPs
showed maximum absorbance at 416 nm and particles were polydispersed in nature, spherical in shape
and the size of the particle obtained was 685 nm. The DdAgNPs exhibited antibacterial activity against
Staphylococcus aureus ATCC 6538, Bacillus cereus NCIM 2106, Escherichia coli ATCC 8739 and Pseudomonas
aeruginosa ATCC 9027. The DdAgNPs showed potent larvicidal activity against second instar larvae of
dengue vector Aedes aegypti with a LC50 value of 9.6 ppm.