To define the selective toxicity of pirimicarb (5,6-dimethyl-2-dimethylamino-4-pirimidinyl dimethyl carbamate) for use in integrated control, the toxicity of a 50% wettable powder and a fumigant were tested vs. 1 pest and 3 beneficial arthropod species. Although pirimicarb was highly toxic to the green peach aphid (Myzus persicae(Sulzer)) it was not toxic toChrysopa carneaStephens,Encarsia formosaGahan, andPhytoseiulus persimilisAthias-Henriot. Therefore, pirimicarb could be a particularly useful pesticide in a multipest, integrated control program for greenhouse crop production where aphids, whiteflies and mites coexist.