Efficacy of fungus mediated silver and gold nanoparticles against Aedes aegypti larvaeParasitology Research (2011)
Chrysosporium tropicum is a pathogenic fungus.
It is known to be an effective mosquito control agent. In the
present study, we have synthesized the silver and gold
nanoparticles using C. tropicum. These nanoparticles have
been characterized through Microscan reader, X-ray diffractometer,
transmission electron microscopy, and further
confirmed by scanning electron microscopy. The characterization
study confirmed the spherical shape and size (2–15
and 20–50 nm) of gold and silver nanoparticles. These silver
and gold nanoparticles have been tested as a larvicide against
the Aedes aegypti larvae. The larvicidal efficacy was noted
when performed against all instars of A. aegypti at six
different log concentrations, and significant results could be
observed. The gold nanoparticles used as an efficacy
enhancer have shown mortality at three times higher
concentration than the silver nanoparticles. The larval
mortality was observed after different time of exposures.
The mortality values were obtained using the probit analysis.
The larvae of A. aegypti were found to be highly susceptible
for the silver nanoparticles. The second instar larvae have
shown 100% mortality against the silver nanoparticles after
1 h, whereas the first, third, and fourth instars have shown
efficacy (LC50=3.47, 4, and 2; LC90=12.30, 8.91, and 4;
LC99=13.18, 13.18, and 7.58, respectively) after 1 h. The
results could suggest that the use of fungus C. tropicum,
silver, and gold nanoparticles is a rapid, environmentally
safer, and greener approach for mosquito control. This could
lead us to a new possibility in vector control strategy.
Publication DateSummer May 13, 2011
Citation InformationNamita Soni and Soam Prakash. "Efficacy of fungus mediated silver and gold nanoparticles against Aedes aegypti larvae" Parasitology Research (2011)
Available at: http://works.bepress.com/soamprakash/5/