Tip Top Bio-Control Aphidius Ervi Beneficial Parasitic WaspsA parasitic wasp that attacks several species of aphids. Live insects from Tip Top Bio Are Expedited To Ensure Your Insects Arrive Quickly & Safely. Used mostly in greenhouses producing vegetables and ornamentals. Adult wasps are black 4 5 mm long. Adult females lay eggs from their abdomen by quickly curling their abdomen and puncturing an aphid simultaneously with its ovipositor. The egg once inside the aphid will hatch into a larva and consumes the