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VOL. 9, ISSUE 8 (2024)
Mosquito larvicidal effect of sonicated biogenic bismuth- Silver oxide nanocomposites
Authors
Adithya Conjeevaram Gopal, M Raja, Jisha Hannie Selson, MF Valan
Abstract
Mosquitoes are a serious menace and they are a vector of pathogens such
as malaria, filarial worm, Japanese encephalitis and dengue. Culex sp.,
a known mosquito species is a vector of the filarial worm causing filariasis.
In recent times, there has been a rise in the insecticidal resistance among
mosquitoes. This has paved the need for development of alternative insecticides
to combat the threat of mosquitoes. Nanotechnology is an interdisciplinary
science which involves in the fabrication of materials at nanoscale (one-
billionth size). Nanomaterials have a plethora of applications in medical,
opto-electronic and environmental cleanup sector. The nanomaterials have also
found an application in insecticidal and insect repellant studies. The present
work involved in the fabrication of silver oxide- bismuth nanocomposites using
ethanolic extract of Curcuma longa by sonication method. Structural
characterization of the nanomaterials involved the usage of UV- Vis, FT- IR,
SEM- EDX and XRD. The size of the nanoparticles as reported from the SEM- EDX
was reported to be 123.108 nm. FT-IR analysis reported the OH- stretches of
alcohol, alkene, C-O single bond stretch, OH-group of carboxylic acid
disturbances and bimetallic metal-metal oxide fingerprint region. The XRD
reported an orthorhombic crystal and the grain size was found to be 120.73 nm
by using the modified Debye- Scherrer Equation. The larvicidal activity as
against Culex Quinquefasciatus., was found to be 100 percent at the four
tested concentrations viz., 500 ppm, 250 ppm, 125 ppm and 62.5 ppm of the
nanocomposites. In Aedes aegypti the larvicidal potency was found to be
100 percent at the tested concentrations viz., 500 ppm, 250 ppm and 125 ppm. From
the above, it was inferred that the Bismuth- Silver Oxide nanocomposites were
found to be highly insecticidal against A. aegypti and C.
quinquefasciatus of mosquitoes.
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Pages:241-245
How to cite this article:
Adithya Conjeevaram Gopal, M Raja, Jisha Hannie Selson, MF Valan "Mosquito larvicidal effect of sonicated biogenic bismuth- Silver oxide nanocomposites". International Journal of Entomology Research, Vol 9, Issue 8, 2024, Pages 241-245
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