Abstract: Adults and newly laid eggs of the astigmatid mite, Tyrophagus putrescentiae were exposed to UV-C (260 nm) and UV-B (315 nm). In adults, the most effective treatments were observed from distance 10 cm and exposure times ranged between 3-15 min with mortality rates between 85-100% for UV-C and 62-83% for UV-B. Based on the LD50 values the UV-C radiation was more effective than the UV-B at different exposure times within each distance tested (5, 10 and 20 cm). A positive correlation was detected between the UV dose and mortality within each distance used for UV-C and UV-B irradiances. Regarding eggs none of the UV-B or UV-C exposed eggs in all treatments hatched.