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VOL. 9, ISSUE 6 (2024)
Evaluation of changes in reproductive and biochemical parameters in indigenous earthworm Perionyx excavatus (Perrier, 1872) against impact of selected pesticides
Authors
Somanka Sanyal, Partha Pratim Chakravorty, Raja Saha
Abstract
Globally the crisis of food is a major cause
of concern. To increase their yield without interference, indiscriminate and
unmanaged application of chemical fertilizers coupled with highly toxic
pesticides has resulted in irreversible destruction of soil ecology greatly
affecting non-target organisms, especially earthworms and deteriorating soil
fertility. Ecotoxicological research has helped us in detecting and
understanding the mode of action of a varied spectrum of xenobiotics in
agro-ecosystem. In the present study acute toxicity of four pesticides viz. Pendimethalin,
Pretilachlor, Dimethoate and Cypermethrin from different groups was compared on
indigenous epigeic earthworm species Perionyx excavatus
(Perrier, 1872) [23] and the changes in cocoon production and
specific activity of acetylcholinesterase enzyme due to long term exposure of
sub-lethal doses of pesticides i.e. T1 (25% of LC50) and T2 (50% of
LC50) values under controlled laboratory conditions. From
the experimental results we could observe that all of the pesticides showed a
significant amount of reduction in cocoon production in earthworms.
Cypermethrin (LC50- 0.012 mg/kg) was most toxic to earthworms
with no cocoon production in T2 dose, but Pendimethalin showed the maximum
suppression in the specific activity of acetylcholinesterase with an enzyme
inhibition percentage of 63.2% and 72.4% in T1 and T2 doses respectively than control
(N) value.
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Pages:47-52
How to cite this article:
Somanka Sanyal, Partha Pratim Chakravorty, Raja Saha "Evaluation of changes in reproductive and biochemical parameters in indigenous earthworm <i>Perionyx excavatus</i> (Perrier, 1872)<i> </i>against impact of selected pesticides". International Journal of Entomology Research, Vol 9, Issue 6, 2024, Pages 47-52
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