Kairomones from scarabaeid grubs and their frass as cues in below-ground host location by the parasitoids Tiphia vernalis and Tiphia pygidialis

Content Provider	Semantic Scholar
Copyright Year	2002
Abstract	Cues used in below-ground host-searching behaviour and host discrimination were examined for Tiphia vernalis Rohwer and Tiphia pygidialis Allen (Hymenoptera: Tiphiidae), ecto-parasitoids of root-feeding larvae of the Japanese beetle, Popillia japonica Newman, and masked chafers, Cyclocephala spp. (Coleoptera: Scarabaeidae), respectively. Response to potential stimuli was compared in dual choice tests in an observation chamber filled with soil. Each wasp showed species-specific, directed movement along residual body odor trails made by dragging its respective host through the soil. Presence of a grub was not necessary for wasps to follow such trails. Frass from either hostor non-host grubs elicited trail-following, but each Tiphia species followed frass trails from its respective host when a choice was presented. Frass trails elicited stronger responses than body odor trails. The combination of host frass and body odor elicited the strongest trail-following responses. Our results suggest that once in the soil, Tiphia spp. locate their hosts using contact kairomones present in grub body odor trails and frass.
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://www.crec.ifas.ufl.edu/academics/faculty/rogers/PDF/16RogersandPotter2002HostLocation.pdf
Language	English
Access Restriction	Open
Subject Keyword	Blinded Drag and drop Dual Fill Hymenoptera Kairomones Larva Odors Order Coleoptera Popillia WAsP Wasps
Content Type	Text
Resource Type	Article