Title: Semiochemical-mediated location of host-habitat by Apanteles carpatus (Say), a parasitoid of tineid larvae
Abstract: In Y-tube olfactometer bioassays, adult Apanteles carpatus (Say), were attracted to beaver or rabbit pelts infested with larvae of the casemaking clothes moth (CCM), Tinea pellionella L. Porapak Q-captured volatiles from a CCM-infested beaver pelt were also very attractive, whereas isolated CCM larvae or larval faeces were not. Coupled gas chromatographic-electroantennographic detection (GC-EAD) analysis of the Porapak Q volatile extract revealed two compounds that elicited responses by A. carpatus antennae. Coupled GCmass spectrometry (MS) in electron impact and chemical ionization modes of these compounds indicated, and GC-MS and GC-EAD of authentic standards confirmed, that they were nonanal and geranylacetone. While each compound singly did not attract A. carpatus, a 1 : 1 blend of both compounds was as attractive as the volatile extract. Because these compounds are host-habitat derived, A. carpatus is a habitatrather than host-specialist responding to kairomonal indicators of localized and specific habitats such as animal hair or feather. The tritrophic interaction between A. carpatus, its clothes moth hosts and their animal-derived habitats is similar to the well-studied relationship between parasitoids of insect herbivores and their host-plant habitats.
Publication Year: 1996
Publication Date: 1996-01-01
Language: en
Type: dissertation
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