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Article
Microbial synthesis of spherical nanosilver and nanogold for mosquito control
Annals of Microbiology (2013)
  • Soam Prakash
  • Namita Soni
Abstract
Biosynthesis of metal nanoparticles using microorganisms
is an important area of research in
nanobiotechnology, which is an emerging eco-friendly
science of well-defined sizes, shapes and controlled
monodispersity. The present study proposed a green process
for the extracellular production of silver (Ag) and
gold (Au) nanoparticles (NPs) using the soil fungi
Chrysosporium keratinophilum and Verticillium lecanii .
The synthesized NPs were formed fairly uniform with
spherical shape determined by Transmission Electron
Microscope (TEM) and confirmed by Scanning Electron
Microscope (SEM). Elemental analysis on single particle
was carried by EDX analysis. The results were further
supported by UV-vis spectrophotometry. In addition, we
have also investigated the effect of synthesized AgNPs
and AuNPs against the larvae and pupae of Anopheles
stephensi , Culex quinquefasciatus and Aedes aegypti .
The efficacy test was performed at different concentrations
for periods of different lengths by the probit analysis.
The larvae and pupae of Cx. quinquefasciatus , An.
stephensi and Ae. aegypti were found highly susceptible
to the synthesized AgNPs than the AuNPs. The larvae of
Cx. quinquefasciatus and Ae. aegypti were found to be
more susceptible to the AgNPs and AuNPs synthesized
using the C. keratinophilum and V. lecanii compared
with the larvae of An. stephensi . The pupae of Ae.
aegypti have shown higher mortality against the synthesized
AgNPs than the pupa of Cx. quinquefasciatus ,
while no adverse effects could be observed in the pupa
of An. stephensi . By this approach, it is suggested that
this rapid synthesis of nanoparticles would be useful for
developing a biological process for mosquito control.
Keywords
  • Chrysosporiumkeratinophilum . Verticillium lecanii . Novel nanoparticles . Efficacy . Mosquito . Larvae . Pupae
Disciplines
Publication Date
Winter November 24, 2013
Citation Information
Soam Prakash and Namita Soni. "Microbial synthesis of spherical nanosilver and nanogold for mosquito control" Annals of Microbiology (2013)
Available at: http://works.bepress.com/soamprakash/13/