EFFECT OF GSH DEPLETION MEDIATED BY I-BSO ON THE INSECTICIDAL ACTIVITY OF DDT AND FENITROTHION IN TRIATOMA-INFESTANS (HEMIPTERA)

l-BSO injected at a sublethal dose in nymph V of Triatoma infestans pr oduces a transient GSH depletion in the abdomen. A depletion of the to tal content of GSH was observed in nymph II fed with a sublethal conce ntration of l-BSO. Either ingestion or injection pretreatments of T. i nfestans nymph V with sublethal concentrations of l-BSO produced a sli ght synergism on the toxicity of fenitrothion. Feeding administration of a sublethal concentration of l-BSO to nymphs II of T. infestans res ulted in a weak potentiation of the acute toxicity of DDT.