Interactions between peach extrafloral nectaries, ants, and T. minutum , the dominant parasitoid of oriental fruit moth eggs in West Virginia, were investigated in replicated orchard plots during 2003. A factorial design compared parasitism and survival of sentinel oriental fruit moth eggs affixed to peach trees with or without extrafloral nectaries and with or without ant access to the canopy. In addition, limb caging techniques were used to partially or fully exclude natural enemies, enabling the relative impact of ants as compared to other natural enemies to be determined. The results indicate that ants, in the presence of extrafloral nectaries, disrupt T. minutum effectiveness against the oriental fruit moth.