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VOL. 11, ISSUE 4 (2026)
Neurohistological evaluation of alphamethrin-induced lesions in the brain and thoracic ganglia of Dysdercus koenigii
Authors
Zuhal Khan, Mohammad Amir, Seerat Fatma
Abstract
Dysdercus koenigii,
commonly known as the red cotton stainer, is a devastating pest of cotton. It
causes severe damage to cotton cultivation across various states of India. This
study aimed to investigate the insecticidal-induced lesions in the central
nervous system of Dysdercus koenigii using light microscopy. An acute
toxicity test was performed to determine the median lethal concentration (LC₅₀)
of Alphamethrin in Dysdercus koenigii. LC₅₀ was calculated to be 568 µg
a.i./L after 24 h exposure. The sublethal dose, LC₂₀, 146 µg a.i./L, was
selected for histological studies. Neurohistological lesions were examined
after 24 h and 48 h of exposure to this sublethal dose. Considerable changes
including neuropile disorganization, increased vacuolation, pyknotic nuclei,
neuronal degeneration and striated border disorientation were observed in the
treated ganglia. However, in brain, slight cytomorphological changes like
pyknotic nuclei was observed after 24 h and 48 h of exposure. Thus, our study
demonstrated the action of alphamethrin causes physiological abnormalities in
the central nervous system of Dysdercus koenigii.
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Pages:51-56
How to cite this article:
Zuhal Khan, Mohammad Amir, Seerat Fatma "Neurohistological evaluation of alphamethrin-induced lesions in the brain and thoracic ganglia of Dysdercus koenigii". International Journal of Entomology Research, Vol 11, Issue 4, 2026, Pages 51-56
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