Host microhabitat location by stem-borer parasitoid Cotesia flavipes: the role of herbivore volatiles and locally and systemically induced plant volatiles

The origin of olfactory stimuli involved in the host microhabitat location in Cotesia flavipes, a parasitoid of stem-borer larvae, was investigated in a Y-tube olfactometer. The response of female C. flavipes towards different components of the plant-host complex, consisting of a maize plant infeste...

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Bibliographic Details
Published in:Journal of chemical ecology 1995-05, Vol.21 (5), p.525-539
Main Authors: Potting, R.P.J. (Agricultural University Wageningen, Wageningen, The Netherlands.), Vet, L.E.M, Dicke, M
Format: Article
Language:English
Subjects:
Animal and plant ecology
Animal, plant and microbial ecology
Animals
ATRAYENTES
ATTRACTIF
Autoecology
AUXILIAIRE DE LUTTE BIOLOGIQUE
Biological and medical sciences
Braconidae
CHILO PARTELLUS
COMPORTAMIENTO
COMPORTEMENT
COMPOSE VOLATIL
COMPUESTO VOLATIL
COTESIA
Cotesia flavipes
Fundamental and applied biological sciences. Psychology
HABITAT
Hymenoptera
Laboratorium voor Entomologie
Laboratory of Entomology
ORGANISMOS PARA CONTROL BIOLOGICO
PARASITOIDE
PARASITOIDES
Protozoa. Invertebrata
RELACIONES HUESPED PARASITO
RELATION HOTE PARASITE
ZEA MAYS
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Summary:The origin of olfactory stimuli involved in the host microhabitat location in Cotesia flavipes, a parasitoid of stem-borer larvae, was investigated in a Y-tube olfactometer. The response of female C. flavipes towards different components of the plant-host complex, consisting of a maize plant infested with two or more larvae of the stem borer Chilo partellus, was tested in dual-choice tests. The concealed lifestyle of the stem-borer larvae did not limit the emission of volatiles attractive to a parasitoid. A major source of the attractive volatiles from the plant-host complex was the stem-borer-injured stem, including the frass produced by the feeding larvae. Moreover, the production of volatiles attractive to a parasitoid was not restricted to the infested stem part but occurs systemically throughout the plant. The uninfested leaves of a stem-borer-infested plant were found to emit volatiles that attract female C. flavipes. We further demonstrate that an exogenous elicitor of this systemic plant response is situated in the regurgitate of a stem-borer larva. When a minor amount of regurgitate is inoculated into the stem of an uninfested plant, the leaves of the treated plant emit volatiles that attract female C. flavipes
ISSN:0098-0331
1573-1561
DOI:10.1007/BF02033699