ARCHIVES
VOL. 8, ISSUE 11 (2023)
In vitro investigation on the Larvicidal activity of the mosquito Aedes aegypti with biosynthesised silver nanoparticles from the seaweed extract of Kappaphycus alverazii
Authors
Samivel Chelliah, Vasugi Swamivel Rathinavelu, Krishnamoorthy Palaniyandi, Raja Krishnamoorthy
Abstract
Mosquitoes are the main vectors of diseases
like chikungunya, dengue, and malaria. Neurotoxic pesticides have negative
effects on humans and ecosystems. Nanotechnology, using plant extract
nanoparticles like AgNPs, is being explored for pest eradication. Seaweed
species, abundant in marine environments, have similar insecticidal qualities
to land plants and fungi. The present study examines silver nanoparticles from Kappaphycus
alverazii and AgNPs produced through biosynthesis. K. alverazii
seaweed was collected from Thondi, South India, pulverized, and boiled into an
extract. The study characterizes K. alverazii silver nanoparticles using
various techniques, including UV-Vis spectroscopy, FTIR, SEM, EDAX, and XRD. The
researchers used photocatalysis to synthesize AgNPs by reducing silver ions in
a reaction mixture with AgNO3 and an aqueous seaweed extract. The
color change was observed after 30 minutes of exposure to sunlight, indicating
the formation of AgNPs. These nanoparticles were tested on Ae. aegypti
larvae, assessing their larvicidal activity and mortality rates. The study
found that the larvicidal properties of K. alverazii AgNPs exhibited
varying effects on larvae depending on their exposure level. The mortality rate
varied from 85.33% for third instar larvae to 90.67% for fourth instar larvae.
Control was maintained throughout the study, and no larval mortality was observed.
As a consequence of this, the current study is to investigate the larvicidal
activity of K. alverazii extract and its AgNPs on larvae of Ae.
aegypti in their third and fourth instars.
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Pages:20-25
How to cite this article:
Samivel Chelliah, Vasugi Swamivel Rathinavelu, Krishnamoorthy Palaniyandi, Raja Krishnamoorthy "<i>In vitro</i> investigation on the Larvicidal activity of the mosquito <i>Aedes aegypti </i>with biosynthesised silver nanoparticles from the seaweed extract of <i>Kappaphycus alverazii</i>". International Journal of Entomology Research, Vol 8, Issue 11, 2023, Pages 20-25
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