Insecticide efficacy at the maximum field recommended rate in Spain after different modes of exposure of pymetrozine, natural pyrethrins+PBO and triflumuron was tested in adults of the endoparasitoid Psyttalia concolor. Malathion was used as reference insecticide. Pymetrozine and triflumuron resulted harmless in all treatments and did not affect longevity or progeny size. Nevertheless, malathion and natural pyrethrins + PBO were very toxic to the parasitoid, irrespective of the mode of application used. Insecticides were classified according to the IOBC categories. Bioassays were performed again with a broad range of concentrations to calculate CL50 after three days of treatment. Malathion was 1.8 times more toxic than natural pyrethrins + PBO when ingested, whereas natural pyrethrins + PBO were more effective when topically applied. Psyttalia concolor (Braconidae) Ecology; Population dynamics; Pollution; Chemical pollution; Abiotic factors; Chemical factors Psyttalia concolor; Mortality; Fertilizer and pesticide pollution; Insecticides; Fertilizers and pesticides; Toxicity to adult stage of parasitoid none