First report of Eurytoma plotnikovi Nik. (Hymenoptera, Eurytomidae), a seed parasite of pistachio, in Sicily (Italy)

The pistachio seed wasp, Eurytoma plotnikovi Nik.(Hymenoptera, E urytomidae), is a new pest recently arrived in pistachio orchards in central-western Sicily (Italy). Information on the damaging effects of this seed wasp in the affected areas is provided.