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

Bioelectromagnetics · 2022 · Harm · Low evidence

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HarmLow evidencePaper 767

Study snapshot

PublicationBioelectromagnetics · 2022

Study typeanimal

Reported directionHarm

Evidence ratingLow

Abstract

The Impact of Magnetic Field on Insecticide Toxicity Measured by Biological and Biochemical Parameters of Earias insulana (Bollworm) Hisham M El-Bassouiny, Warda A Z El-Medany, Mervat A A Kandil. The Impact of Magnetic Field on Insecticide Toxicity Measured by Biological and Biochemical Parameters of Earias insulana (Boisd). Bioelectromagnetics. 2022 Aug 5. doi: 10.1002/bem.22418. Abstract This study illustrates the effect of magnetic field (MF) on the toxicity of two insecticides, emamectin benzoate (Emazoate 2.15% EC) and spinosad (SpinTor 24% SC), and determines their adverse effects on the bollworm (Earias insulana) through various biological and biochemical assays. The investigation indicated that exposure to the insecticides in a MF of 180 mT resulted in stronger toxicity, with LC50 values of 0.162, 1.211, and 1.770 ppm, respectively. In addition, the results showed that magnetized insecticides significantly increased in the duration of the total immature stages (larvae and/or pupae) 32.1 and 36.6 days, compared with 27.9 and 30.5 days, respectively, in the nonmagnetized insecticides, while untreated check was 21 days. Also, the magnetized insecticides reduced the percentage of adult emergence, and increased deformations in the larval and pupal stages. Furthermore, sex ratio was greatly affected by exposure to both insecticides in conjunction with the MF. Exposure of the larvae of E insulana to magnetized insecticides can bring about malfunction in some biochemical process and significantly decreased the invertase activity, and decreased the total protein and carbohydrates. In contrast, it can increase amylase compared with nonmagnetized insecticides and untreated controls. Results concluded that the two insecticides' MF affected growth, survival time, and biological and biochemical parameters of E. insulana. pubmed.ncbi.nlm.nih.gov

Machine Enhanced Logic

AI evidence extraction

Structured fields below were generated from the paper’s abstract and metadata to make the evidence easier to inspect. Automated extraction may be incomplete or incorrect; verify important details against the original paper.

Study typeanimal

Effect directionharm

PopulationEarias insulana (bollworm)

Sample sizeNot supplied

ExposureNot supplied

Evidence strengthLowConfidence: 74% · Peer reviewed: yes

Main findings

Exposure to insecticides in a magnetic field of 180 mT was associated with stronger toxicity (reported LC50 values 0.162, 1.211, and 1.770 ppm). Magnetized insecticides increased duration of immature stages, reduced adult emergence, increased deformations, altered sex ratio, decreased invertase activity and total protein/carbohydrates, and increased amylase compared with nonmagnetized insecticides and untreated controls.

Outcomes measured

Insecticide toxicity (LC50)
Duration of immature stages (larvae/pupae)
Adult emergence percentage
Larval and pupal deformations
Sex ratio
Invertase activity
Amylase activity
Total protein
Total carbohydrates

Limitations

Sample size not reported in abstract
Magnetic field frequency and exposure duration not reported in abstract
Details of experimental design and statistical methods not provided in abstract
Findings are in an insect model; human relevance not addressed in abstract

View raw extracted JSON

{
  "study_type": "animal",
  "exposure": {
    "band": null,
    "source": "magnetic field with insecticide exposure (magnetized insecticides)",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": null
  },
  "population": "Earias insulana (bollworm)",
  "sample_size": null,
  "outcomes": [
    "Insecticide toxicity (LC50)",
    "Duration of immature stages (larvae/pupae)",
    "Adult emergence percentage",
    "Larval and pupal deformations",
    "Sex ratio",
    "Invertase activity",
    "Amylase activity",
    "Total protein",
    "Total carbohydrates"
  ],
  "main_findings": "Exposure to insecticides in a magnetic field of 180 mT was associated with stronger toxicity (reported LC50 values 0.162, 1.211, and 1.770 ppm). Magnetized insecticides increased duration of immature stages, reduced adult emergence, increased deformations, altered sex ratio, decreased invertase activity and total protein/carbohydrates, and increased amylase compared with nonmagnetized insecticides and untreated controls.",
  "effect_direction": "harm",
  "limitations": [
    "Sample size not reported in abstract",
    "Magnetic field frequency and exposure duration not reported in abstract",
    "Details of experimental design and statistical methods not provided in abstract",
    "Findings are in an insect model; human relevance not addressed in abstract"
  ],
  "evidence_strength": "low",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "magnetic field",
    "180 mT",
    "insecticide toxicity",
    "emamectin benzoate",
    "spinosad",
    "Earias insulana",
    "LC50",
    "biochemical parameters",
    "invertase",
    "amylase"
  ],
  "suggested_hubs": [
    {
      "slug": "occupational-exposure",
      "weight": 0.2,
      "reason": "Study involves relatively strong magnetic field exposure (180 mT), potentially relevant to high-field/occupational MF contexts, though setting is not specified."
    }
  ]
}

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AI-extracted fields are generated from the abstract and metadata and may be incomplete or incorrect. This material is for informational purposes and is not medical advice.

Identifiers and source

DOI: 10.1002/bem.22418
PubMed: 35930550

Read the original paper →

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