ARBICO Organics Aphidius Ervi Beneficial Parasitic WaspsUse this aphid parasite to prevent outbreaks of larger aphid species in greenhouse environments. Ships FREE via Overnight methods on Tuesdays Only. MINIMUM 7 day processing prior to shipment. Aphidius ervi will consume all types of larger aphids, especially the potato aphid, Macrosiphum euphorbiae, and the glasshouse potato aphid, Aulacorthum solani. It also parasitizes Myzus persicae var. nicotianae, as well as aphids such as Sitobion sp., Schizaphis