In this investigation, the concentration levels of potassium, calcium, iron, nickel and cadmium for three Chrysolina species were measured in the region of Erzurum (Turkey) located at latitude 40 degrees 17' north and longitude 41 degrees 17' east. The concentrations measured by energy dispersive X-ray fluorescence (EDXRF) spectrometry were analysed. Photons of 59.5 keV and 5.9 keV emitted, respectively, by an annular Am-241 and Fe-55 radioactive source were used to excite the characteristic X-rays of various elements present in the insect samples. These results are presented and discussed in this paper. (C) 2005 Elsevier Ltd. All rights reserved.