In the present investigation the larvicidal and pupicidal activity of silver nanoparticle synthesized by the leaf extracts of Artemisia nilagirica against Aedes aegypti was attempted in laboratory condition. The synthesis of silver nanoparticles was initially confirmed by formation of brown colour in the reaction mixture within 1 day incubation. The synthesis of silver nanoparticles in the reaction mixture was further confirmed by UV-Vis spectroscopy showed an absorption band at 415.00nm. SEM analysis provided the shape of sliver nanoparticle is spherical and particle size was 8nm. The XRD analysis showed three distinct differentiation peaks can be indexed 2Ɵ values crystalline planes of cubic silver. FTIR analysis showed the functional group of synthesized silver nanoparticles and the absorption bands seen at 3180.4, 1744.49, 1685.67, 1544.88, 1396.37, 1371.29, 988.45, 705.9 and 518.82cmˉ¹.