Seasonal field parasitism of Halyomorpha halys and co-occurring non-target species in China

In China, the brown marmorated stinkbug, Halyomorpha halys, is parasitized by a complex of egg parasitoids, of which Trissolcus japonicus is considered the most effective species. Previous studies have reported egg parasitism of 60 to 80% in various regions of China. However, the seasonal activity of T. japonicus and other species as well as their ecological host range in the area of origin is still poorly understood. To elducidate the seasonal parasitism patterns of H. halys and the host specificty of T. japonicus under field conditions, sentinel egg masses of H. halys and  non-target stink bugs were exposed in mulberry and peach orchards and natural habitats in the vicinity of Beijing, the area of orgin of introduced H. halys populations in the US.