Document Detail

Intra- and interspecific interactions between Lysiphlebus testaceipes and Lipolexis scutellaris (Hymenoptera: Aphidiidae) reared on Toxoptera citricida (Homoptera: Aphididae).
MedLine Citation:
PMID:  12852589     Owner:  NLM     Status:  MEDLINE    
Classical biological control of the brown citrus aphid Toxoptera citricida Kirkaldy in Florida has involved the release of Lipolexis scutellaris Mackauer. Lysiphlebus testaceipes Cresson is already present in Florida and also parasitizes T. citricida. Because parasitoid-parasitoid interactions may affect the establishment of a newly introduced parasitoid species, intra- and interspecific larval interactions of both parasitoids were studied in the laboratory using T. citricida reared on citrus. Five time intervals were allowed between successive oviposition opportunities. Early developmental times were determined for both parasitoids: eggs of L. testaceipes and L. scutellaris hatched after 54.3 and 61.7 h, while molt to second instar occurred after 73.3 and 87.1 h, respectively, after oviposition at 22 degrees C. At intervals <12 h, both parasitoids had a greater tendency to multiparasitize than to superparasitize, and the tendency to superparasitize or multiparasitize decreased with an increase in time between successive oviposition opportunities. Of the 10 interspecific interactions studied, 5 produced a winning wasp species, 3 of which could be explained by the hypothesis of physical conflict. A combination of development time, age of competing larvae, and oviposition sequence were responsible for the outcomes observed. Neither parasitoid proved to be intrinsically superior when interspecific competition occurs in second- and third-instar T. citricida, indicating there is no reason to suggest that they cannot coexist in Florida citrus groves.
Anand B Persad; Marjorie A Hoy
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of economic entomology     Volume:  96     ISSN:  0022-0493     ISO Abbreviation:  J. Econ. Entomol.     Publication Date:  2003 Jun 
Date Detail:
Created Date:  2003-07-10     Completed Date:  2004-01-13     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  2985127R     Medline TA:  J Econ Entomol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  564-9     Citation Subset:  IM    
Department of Entomology and Nematology, University of Florida, PO Box 110620, Gainesville, FL 32611-0620, USA.
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MeSH Terms
Aphids / parasitology*
Host-Parasite Interactions
Hymenoptera / classification*,  physiology*
Pest Control, Biological
Reproduction / physiology*
Species Specificity
Time Factors

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

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