The Impact of Magnetic Field on Insecticide Toxicity Measured by Biological and Biochemical Parameters of Earias insulana (Bollworm)

Authors: Hisham M El-Bassouiny, Warda A Z El-Medany, Mervat A A Kandil

Year: 2022 Aug 5

Category: Bioelectromagnetics

Journal: Bioelectromagnetics

Institution: Bioelectromagnetics

DOI: 10.1002/bem.22418

URL: https://pubmed.ncbi.nlm.nih.gov/35930550/

Abstract

Overview

This study investigates the impact of magnetic fields (MF) on the toxicity of insecticides towards the bollworm (Earias insulana), focusing on two specific chemicals: emamectin benzoate and spinosad.

Findings

  • Exposure to insecticides in a MF of 180 mT shows significantly higher toxicity.
  • The LC50 values demonstrate substantially heightened lethality at 0.162, 1.211, and 1.770 ppm.
  • Magnetized insecticides prolong the duration of immature stages in bollworms by several days compared to nonmagnetized forms.
  • Significant reductions in adult emergence and increases in larval and pupal deformations were observed.
  • The sex ratio of bollworms was notably altered due to MF exposure in conjunction with insecticides.
  • Biochemical disruptions were noted, including decreased invertase activity and total protein and carbohydrates, contrasting with increased amylase activity.

Conclusion

Results indicate a clear and concerning interaction between magnetic fields and insecticide efficacy and safety, affecting various biological and biochemical parameters of the bollworm, potentially indicating wider ecological impacts.

magnetic field insecticide toxicity Earias insulana biochemical assays bioelectromagnetics
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