Abstract: Orientation response of field-collected individuals of the ladybird adults, Chilocorus rubidus Hope, to volatiles from aphid, Hyalopterus amygdale, Chaitophorus populialbae, Cinara pinitabulaeformis, sacle, Didesmococcus koreanus, from aphid or scale-infested plants, and from uninfested plants were tested with Y-tube olfactometer bioassays. Both male and female adults of C. rubidus showed a significant preference for volatiles from H. amygdale or D. koreanus-infested host plants. However, both of them did not response positively to volatiles from H. amygdale, D. koreanus, from uninfested plants, Prunus persica, Prunus ceraifera, Populus tomentosa, Pinus tabulaeformis and from C. populialbae or C. pinitabulaeformis-infested host plants. The results indicate that C. rubidus may use volatiles from prey-infested plants as the olfactory cue for prey location.