Document Detail

Attraction of parasitic wasps by caterpillar-damaged plants.
MedLine Citation:
PMID:  10549546     Owner:  NLM     Status:  MEDLINE    
Plant volatiles emitted in response to herbivory have been suggested to function as signals to attract natural enemies of herbivores. Most known examples of induced plant volatiles used by natural enemies involve parasitoids that locate caterpillars by means of odours emitted by plants after caterpillar attack. We study the tritrophic system that comprises the parasitoid Cotesia marginiventris, host caterpillars from the genus Spodoptera, and maize plants. Among the volatiles emitted by caterpillar-damaged maize plants, sesquiterpenes and indole are particularly attractive to the parasitoid. The usefulness of these plant volatiles for parasitoids is obvious. Less clear is their benefit to plants that emit them, as in most cases parasitization does not immediately stop caterpillars from damaging plants. However, plants appear to benefit directly from attracting C. marginiventris, as parasitized caterpillars consume considerably less plant tissue than unparasitized caterpillars. It is expected that in systems where parasitoids significantly reduce herbivory, they have contributed to selective pressures that have shaped the phenomenon of herbivore-induced volatile emissions by plants.
T C Turlings; M E Fritzsche
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Review    
Journal Detail:
Title:  Novartis Foundation symposium     Volume:  223     ISSN:  1528-2511     ISO Abbreviation:  Novartis Found. Symp.     Publication Date:  1999  
Date Detail:
Created Date:  1999-12-01     Completed Date:  1999-12-01     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9807767     Medline TA:  Novartis Found Symp     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  21-32; discussion 32-8     Citation Subset:  IM    
Institute of Zoology, University of Neuchâtel, Switzerland.
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MeSH Terms
Plants / parasitology*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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