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Abstract
Mosquitoes are the principal vectors of severe diseases like malaria, dengue, Japanese encephalitis, chikungunya, filariasis, yellow fever etc. The three genera Anopheles stephensi, Aedes aegypti and Culex quinquefasciatus are responsible for transferring the above mentioned diseases. For mosquito control, the synthetic insecticides were used but their continuous application leads to the development of resistance in mosquitoes, hazardous effects on environment and toxic to non- target organisms including humans. It creates a big challenge in front of researchers that they synthesized eco-friendly and non-toxic insecticides by using natural products against mosquito vectors. In the present study, the larvicidal activity of silver nanoparticles (AgNPs) engineered by using leaf extract of Eucalyptus globulus against the third instar larvae of Cx. quinquefasciatus. The bio-engineered AgNPs were characterized by UV-visible spectroscopy and Fourier transform infrared (FTIR). The surface plasmon resonance (SPR) was observed at 420nm in UV-vis spectrophotometer. The presence of different functional groups in compounds was studied by FTIR.