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VOL. 9, ISSUE 2 (2024)
Characterization of Euphorbia hirta synthesized zinc nanoparticles and its genotoxicity against tobacco cutworm, Spodoptera litura Feb. (Lepidoptera; Noctuidae)
Authors
V S Kavitha, M Vimala Devi, V Uthayakumar, R Chandirasekar
Abstract
This study examined the efficacy of green
nanoparticles derived from E. hirta methanol extract as biopesticides
against the tobacco cutworm Spodoptera litura Feb. (Lepidoptera). The
utilization of Euphorbia hirta leaf extract facilitated the synthesis of
zinc nanoparticles, which were characterized by their rod-shaped morphology by
the analysis of UV spectra, X-ray diffraction patterns, and scanning electron
microscopy (SEM). The study conducted a probit analysis on the first, second,
third, fourth, fifth, and sixth instars of S. litura to determine the lethal
concentrations (LC50) of the nanoparticles and plant extract. The
results showed a positive correlation between the LC50 values and the older
instars. The LC50 values for the plant extract varied between
286.515 ppm and 468.526 ppm, while the LC50 values for ZnONP ranged
from 8.984 ppm to 26.074 ppm (larva I). The extract of E. hirta
significantly reduced fertility at a concentration of 50ppm and lowered
longevity at a concentration of 500ppm. The ZnONP that was produced through
biological synthesis exhibited notable DNA fragmentation in the treated worm,
suggesting its potential to induce genotoxicity. Eh-ZnONP was found to be the
most potent biogenic compound for decreasing the population of S. litura, while
also being environmentally benign.
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Pages:20-28
How to cite this article:
V S Kavitha, M Vimala Devi, V Uthayakumar, R Chandirasekar "Characterization of <i>Euphorbia hirta</i> synthesized zinc nanoparticles and its genotoxicity against tobacco cutworm, <i>Spodoptera litura</i> Feb. (Lepidoptera; Noctuidae)". International Journal of Entomology Research, Vol 9, Issue 2, 2024, Pages 20-28
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