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Updated: Jun 20, 2026
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A High-throughput Assay for the Prediction of Chemical Toxicity by Automated Phenotypic Profiling of Caenorhabditis elegans
Published on: March 14, 2019
Earthworm cast production as a new behavioural biomarker for toxicity testing
Yvan Capowiez1, Nils Dittbrenner, Magali Rault
1INRA, UR1115 Plantes et Systèmes Horticoles, Domaine Saint Paul, 84914 Avignon Cedex 09, France. capowiez@avignon.inra.fr
Environmental Pollution (Barking, Essex : 1987)
|September 29, 2009
Summary
This study introduces a new earthworm ecotoxicity test measuring cast production (CP) by Lumbricus terrestris. This ecologically relevant method effectively detects pesticide impacts on soil health.
Area of Science:
- Environmental Toxicology
- Soil Ecology
- Ecotoxicology
Background:
- Existing earthworm ecotoxicity tests lack ecological relevance and direct links to soil function.
- There is a need for sensitive and practical endpoints to assess pesticide effects on soil invertebrates.
Purpose of the Study:
- To develop and validate a novel ecotoxicity test for Lumbricus terrestris based on cast production (CP).
- To evaluate the ecological relevance and sensitivity of CP as an ecotoxicological endpoint for pesticide assessment.
Main Methods:
- Laboratory-based ecotoxicity testing using Lumbricus terrestris.
- Quantification of earthworm cast production (CP) under controlled soil water content.
- Exposure to various pesticides including azinphos-methyl, imidacloprid, carbaryl, methomyl, ethyl-parathion, and chlorpyrifos-ethyl.
Main Results:
- Cast production (CP) showed a linear correlation with earthworm biomass and was sensitive to soil water content.
- Azinphos-methyl did not affect CP at tested concentrations.
- Pesticides like imidacloprid, carbaryl, methomyl, ethyl-parathion, and chlorpyrifos-ethyl significantly reduced CP, with reductions ranging from 35-67% at the highest concentration.
Conclusions:
- Earthworm cast production (CP) is a simple, rapid, and ecologically meaningful endpoint for ecotoxicity testing.
- The proposed CP test effectively detects sublethal effects of pesticides on Lumbricus terrestris, indicating its utility for soil ecotoxicological assessments.
