First Recorded Parasitoid from China of <I>Agrilus planipennis</I>: A New Species of <I>Spathius</I> (Hymenoptera: Braconidae: Doryctinae)

Abstract

The rst reported parasitoid reared from Agrilus planipennis Fairmaire, Spathius agrili n. sp., is described from China. S. agrili was reared from A. planipennis in China attacking a Fraxinus species native to North America, Fraxinus velutina Torr., and one endemic to the region, Fraxinus mandshurica Rupr. Life history observations of S. agrili in the eld and laboratory indicate it is a gregarious idiobiont ectoparasitoid and has up to four generations per year. Parasitism rates in the eld ranged from 30 to 90%, with one to 35 S. agrili eggs associated with a single host. From a host larva 118 adult wasps (average of 8.4) were reared. Based on laboratory rearings, the emerging adult female to male ratio is 3:1.