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Abstract

LARVICIDAL ACTIVITY OF SILVER NANOPARTICLES SYNTHESIZED FROM VITEX NIGUNDO LEAF AGAINST DENGUE VECTOR AEDES ALBOPICTUS (SKUSE)

Yuvo Singh, Swarnagowreeswari G, Sathyavathi R, Ramachandra Reddy P and B. Reddya Naik*

ABSTRACT

In the present study we reported the larvicidal activity of silver nanoparticles synthesized from aqueous leaf extract of Vitex Nigundo against the larvae of Aedes albopictus which is prime vector for Dengue transmission. The characterization of synthesized silver nanoparticles was carried out using UV-vis spectrophotometer and transmission electron microscopy (TEM) Fourier Transform Infrared (FTIR). To find out presence of compounds which are responsible for larvicidal activity, we performed GC-MS analysis. The parasite larvae were exposed to varying concentrations of aqueous extract of and synthesized silver nanoparticles for 24 h as per WHO protocols. From the results it is observed that the mortality rate is two orders of Magnitude higher for silver nanoparticles compared to plant extract. By this approach, it is suggestive that this rapid synthesis of nanoparticles would be proper for developing a biological process for mosquito control.

Keywords: Silver nanoparticles, Aedes albopictus, Vitex nigundo, FT-IR, GC-MS.


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