This study provides evidence of true preimaginal learning of olfactory cues in an ectoparasitoid of the codling moth, Hyssopus pallidus. Key aspects are (1) no olfactory learning of host-plant cues in adults, (2) no olfactory learning during emergence, (3) learning of fruit cues in the preimaginal phase at the beginning of parasitoid development, (4) verification for a host- and fruit independent cue, methanol.