Toxicity of the organophosphorous insecticide chlormephos to the earthworm Eisenia andrei and the terrestrial isopod Porcellio scaber


  • Rok Hrženjak
  • Primož Zidar
  • Tina Virant Celestina
  • Nevenka Kožuh Eržen
  • Lucija Kolar



ecotoxicity, organophosphates, chlormephos, soil exposure, soil invertebrates


In the present study we determined the toxicity of chlormephos to two common soil organisms – earthworms (Eisenia andrei) and isopods(Porcellio scaber) using Lufa 2.2 soil. The LC50 values for the effects on earthworm and isopod survival were 58 and 76 mg/kg dry soil, respectively. Mass change of earthworms and behaviour of isopods were more sensitive end points as survival. Based on earthworm body mass changes, NOEC and LOEC values were 1 and 3 mg/kg dry soil, respectively. The earthworms did not reproduce even at the lowest chlormephos concentration (LOEC < 1 mg/kg dry soil). Isopods significantly avoided burrowing in soil treated with ≥40 mg/kg dry soil. Compared with some other organophosphate insecticides, chlormephos was highly toxic to beneficial terrestrial invertebrates.


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Original Research Paper

How to Cite

Hrženjak, R., Zidar, P., Virant Celestina, T., Kožuh Eržen, N., & Kolar, L. (2009). Toxicity of the organophosphorous insecticide chlormephos to the earthworm Eisenia andrei and the terrestrial isopod Porcellio scaber. Acta Biologica Slovenica, 52(2), 85-94.

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