Ash-trees
Guides
Atanycolus cappaerti
Atanycolus cappaerti is a North American braconid wasp that parasitizes larvae of the invasive emerald ash borer (Agrilus planipennis). The species was described in 2009 and has been studied for its potential as a native biological control agent against this destructive forest pest. It is one of several native parasitoids that may be adapting to exploit the emerald ash borer as a host in invaded areas.
Balcha
Balcha is a genus of parasitoid wasps in the family Eupelmidae (Hymenoptera: Chalcidoidea). The genus comprises 16 described species worldwide, including eight newly described species and two newly combined species. Members are ectoparasitoids of wood-boring beetles, with Balcha indica notable as an accidental introduction to North America where it attacks the invasive emerald ash borer (Agrilus planipennis).
Oobius agrili
Oob
Oobius agrili is a tiny, solitary egg parasitoid wasp in the family Encyrtidae, native to Northeast Asia. It is the only egg parasitoid released for biological control of the invasive emerald ash borer (Agrilus planipennis) in North America, where it has been introduced in over 31 US states. The species is parthenogenic, produces multiple generations annually, and achieves partial phenological synchrony with its host's egg-laying period. Individual females can parasitize more than 60 host eggs, with field parasitism rates reaching 60% in optimal conditions.