| Influence of egg load and oviposition time interval on the host discrimination and offspring survival of Anagyrus pseudococci (Hymenoptera: encyrtidae), a solitary endoparasitoid of citrus mealybug, ++Planococcus citri (Hemiptera: pseudococcidae). | |
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MedLine Citation:
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PMID: 10948366 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Oviposition and host discrimination behaviour of unmated Anagyrus pseudococci (Girault), an endoparasitoid of the citrus mealybug Planococcus citri (Risso), were investigated in the laboratory. Female parasitoids were able to discriminate between parasitized hosts and healthy ones. The mean number of ovipositions was significantly higher in unparasitized than in parasitized hosts. Conspecific-superparasitism occurred more often than self-superparasitism. Changes in consecutive ovipositions over three hours by A. pseudococci suggested that egg load influenced the discrimination behaviour of the parasitoids, with females which had low egg loads mostly avoiding oviposition in already parasitized hosts at time intervals ranging from 0 h to 96 h, and distributing their eggs in the high quality (unparasitized) hosts. The parasitized hosts were rejected more commonly through antennal perception of external markers than during ovipositor probing which could have encountered internal markers but this relationship changed with increasing time after oviposition. The parasitoid's oviposition rate in unparasitized and conspecific-parasitized hosts varied at the different oviposition time intervals when the females had fewer eggs in the ovaries. Percentage emergence of parasitized offspring was not significantly influenced by whether they developed in single or superparasitized mealybugs. The significance of host discrimination by A. pseudococci is discussed. |
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Authors:
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K S Islam; M J Copland |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Bulletin of entomological research Volume: 90 ISSN: 0007-4853 ISO Abbreviation: Bull. Entomol. Res. Publication Date: 2000 Feb |
Date Detail:
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Created Date: 2000-11-09 Completed Date: 2000-11-09 Revised Date: 2003-11-14 |
Medline Journal Info:
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Nlm Unique ID: 2984715R Medline TA: Bull Entomol Res Country: ENGLAND |
Other Details:
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Languages: eng Pagination: 69-75 Citation Subset: IM |
Affiliation:
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Department of Entomology, Bangladesh Agricultural University, Mymensingh, Bangladesh. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Animals Female Hemiptera / parasitology* Oviposition Ovum Time Factors Wasps / physiology* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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