Abstract
The parasitoid fly Ormia ochracea uses the calling song of its host Gryllus spp. to locate an area inhabited by potential hosts. Once a calling male has been located, O. ochracea deposits live larvae on the host, and on substrates surrounding the host to enable the larvae to attach to and enter individuals in the vicinity of the calling male. In Texas, where O. ochracea parasitizes the Texas field cricket Gryllus texensis, we observed juvenile crickets in the mating aggregations that form around calling males. Juvenile G. texensis crickets are, therefore, potentially susceptible to parasitism by O. ochracea. Here we investigated whether laboratory reared juvenile field crickets could successfully host O. ochracea larvae. We found that juvenile crickets were appropriate hosts for O. ochracea.
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