Studies on Relative Toxicities of Six Insecticides on Epigeic Earthworm, Perionyx excavatus

The 96 h LC₅₀ values of six insecticides were determined on a non-target epigeic earthworm Perionyx excavatus under laboratory conditions. Cypermethrin was found most toxic to P. excavatus (LC₅₀-0.008 mg/kg), followed by endosulfan (LC₅₀-0.03 mg/kg), carbaryl (LC₅₀-6.07 mg/kg), chlorpyrifos (LC₅₀-7....

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Bibliographic Details
Published in:Bulletin of environmental contamination and toxicology 2010-07, Vol.85 (1), p.83-86
Main Authors: Das Gupta, R, Chakravorty, P. P, Kaviraj, A
Format: Article
Language:English
Subjects:
Agriculture - methods
Agronomy
Aldicarb
Animals
Aquatic Pollution
Carbaryl
Chlorpyrifos
Cypermethrin
Earth and Environmental Science
Ecotoxicology
Endosulfan
Environment
Environmental Chemistry
environmental hazards
Environmental Health
Insecticides
Insecticides - toxicity
LC
Lethal Dose 50
LT
Monocrotophos
Oligochaeta - drug effects
Oligochaeta - growth & development
Oligochaeta - physiology
Perionyx excavatus
Pesticides
Pollution
Pyrethrins
Soil Pollutants - toxicity
Soil Science & Conservation
Survival analysis
Toxicology
Waste Water Technology
Water Management
Water Pollution Control
Worms
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Summary:The 96 h LC₅₀ values of six insecticides were determined on a non-target epigeic earthworm Perionyx excavatus under laboratory conditions. Cypermethrin was found most toxic to P. excavatus (LC₅₀-0.008 mg/kg), followed by endosulfan (LC₅₀-0.03 mg/kg), carbaryl (LC₅₀-6.07 mg/kg), chlorpyrifos (LC₅₀-7.3 mg/kg), aldicarb (LC₅₀-10.63 mg/kg) and monocrotophos (LC₅₀-13.04 mg/kg). When these LC₅₀ values were compared with their respective recommended agricultural doses, aldicarb and carbaryl appeared more dangerous than other pesticides because of their lower LC₅₀ values than their respective recommended agricultural dose. Mean lethal time to cause 50% mortality at recommended agricultural dose (LT₅₀) also indicated that aldicarb achieved the fastest LT₅₀ (26 h) followed by endosulfan (38 h) and carbaryl (44 h) indicating the danger of these pesticides to P. excavatus.
ISSN:0007-4861
1432-0800
DOI:10.1007/s00128-010-0038-5