East Lansing, Ingham County, Michigan, USA
April 8, 2011
Size: 1 mm
Two of the emerald ash borer (Agrilus planipennisi)eggs in this image are parasitized by Oobius agrili, an egg parasitoid introduced to the U.S. from China to help manage emerald ash borer. The black pellets inside the parasitized eggs are frass from the parasitoid. The other two eggs contain emerald ash borer larvae about to hatch.