EVALUATION OF SILICA, ZINC AND SILICA/ZINC COMPOSITE NANOPARTICLES LARVICIDAL ACTIVITY AGAINST MOSQUITO VECTOR CONTROL
No Thumbnail Available
Date
0024-01-18
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
KINNAIRD COLLEGE ENVIORNMENTAL SCIENCE DEPARTMENT.
Abstract
In this study silica (SiO2), zinc (Zn) and silica/zinc (SiO2/Zn) composite nanoparticles were
synthesized using aqueous leaves extract of Azadirachta indica as a simple, cheap and
ecofriendly green material as a simple, cheap and ecofriendly material. The present study is
based on the investigation of SiO2, Zn and SiO2/Zn composite nanoparticles against 2nd instar
Aedes aegypti larvae. The green synthesized nanoparticles were characterized with scanning
electron microscope (SEM) and Fourier transform infrared (FTIR) spectroscopy analysis.
Larvicidal bioassay tests were conducted at various doses of NPs for 24 hours. Mortality data
was subjected to probit analysis to determine the LC50, LC90, and LC99 values. Results
demonstrated high potency of ZnO NPs against 2nd instar A. aegypti larvae. ZnO NPs gave a
great larvicidal effect against A. aegypti larvae. Although, larvae treated with all the
nanoparticles showed probit of mortality to be linear and R2 <1. But green synthesized ZnO
NPs showed more significant results as compared to silica, and silica/zinc composites
nanoparticles. These findings suggest that green synthesized NPs could serve as an
alternative potent technology for mosquito vector control