KARESAN AS A SELECTIVE INHIBITOR OF CARBO XYLESTERASES IN ARTHROPODS AND WORMS

The effects of Karesan methoxymethylmercaptomethyl)methylthiophosphana te) on the total esterase activity esterase spectrum were studied in v arious invertebrates (arthropods and earthworms). Karesan at 10(-8) - 10(-5) M was highly selective with respect to carboxylesterases of the studied species. In vivo Karesan proved to be an active synergist to Permetrin both in sensitive and resistant strains of arthropods. On th e basis of the data obtained, we recommend the inclusion of Karesan in the Augustinsson classical scheme for studies of the carboxylesterase spectra in invertebrates by the disk-electrophoresis method.