Ardavan Mardani Ali Almasi Seyed Mehdi Hashemi Majid Mohammadnejad Young Researchers and Elite Club, Marvdasht Branch, Islamic Azad University, Marvdasht, Iran Department of Plant Protection, College of Agriculture, Shahid Chamran University of Ahvaz, Ahvaz, Iran Young Researchers and Elite Club, Ardabil Branch, Islamic Azad University, Ardabil, Iran Department of Plant Protection, College of Agriculture, University of Tehran, Iran Arthropods ISSN 2224-4255 http://www.iaees.org/publications/journals/arthropods/online-version.asp 2017 6 2 67 77 International Academy of Ecology and Environmental Sciences Hong Kong 1 January 2017 8 February 2017 1 June 2017 ecotoxicology IOBC insecticide life table parameters Lysiphlebus fabarum Marshall is the main parasitoid of the black bean aphid, Aphis fabae Scopoli. Lethal and sublethal effects of thiacloprid+deltamethrin, pirimicarb and pymetrozine were evaluated on the parasitoid under laboratory conditions. Newly emerged females were exposed to dry insecticide residues that were applied on glass plates. Thiacloprid+deltamethrin caused 100% mortality. Pirimicarb produced significant mortality and adverse effects on fecundity, while pymetrozin did not. According to the IOBC (International Organization of Biological Control) standards, thiacloprid+deltamethrin (E = 100%), pirimicarb (E = 62.70%) and pymetrozine (E = 11.86%) were classified as harmful, slightly harmful and harmless, respectively. Life table assays revealed that intrinsic rate of natural increase (rm) inthiacloprid+deltamethrin (50%) and pirimicarb (12%) were significantly reduced compared to the control group, while pymetrozine had no such effects. Our results showed that pymetrozine was safe for L. fabarum, but pirimicarb and thiacloprid+deltamethrin had deleterious effects on this parasitoid. In sum, the present study suggests a relative compatibility between pymetrozine and L. fabarum. DOI 10.0000/issn-2224-4255-arthropods-2017-v6-0009 http://www.iaees.org/publications/journals/arthropods/articles/2017-6(2)/side-effects-of-thiacloprid-deltamethrin-and-pirimicarb-and-pymetrozine.pdf