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[Resistance of earthworms Lumbricus terrestris and Allolobophora turgida to the fungicide captan 50 W.P].

Two species of earthworms were kept in Muck, Chicot and Ste-Sophie soils treated with captan 50 W.P. solutions of 700, 1 400 and 2 800 ppm. After a 42-day treatment period, L. terrestris had a 95% survival and A. turgida 100% survival. Using a gas chromatograph method, no captan was detected in tissue extracts of exposed earthworms. Based on the survival rate and the undetected presence of captan in earthworm tissues, we concluded that soil residues of this product are unlikely to be harmful to the animal's ecology.