Influence of rearing hosts on host size acceptance by Trichogramma australicum

Nurindah, Cribb, Bronwen W. and Gordh, Gordon (1999) Influence of rearing hosts on host size acceptance by Trichogramma australicum. BioControl, 44 2: 129-141. doi:10.1023/A:1009910332326

Author Nurindah
Cribb, Bronwen W.
Gordh, Gordon
Title Influence of rearing hosts on host size acceptance by Trichogramma australicum
Journal name BioControl   Check publisher's open access policy
ISSN 1386-6141
Publication date 1999
Sub-type Article (original research)
DOI 10.1023/A:1009910332326
Volume 44
Issue 2
Start page 129
End page 141
Total pages 13
Place of publication Netherlands
Publisher Kluwer Academic Publishers
Collection year 1999
Language eng
Subject C1
270504 Invertebrate Biology
770303 Control of pests and exotic species
Abstract We investigated the acceptance of different sized host models by Trichogramma australicum in the laboratory. We used isoline cultures of T. australicum reared in hosts of different sizes. Helicoverpa armigera represent relatively large hosts, and those of Sitotroga cerealella are small, termed the Ha and Sc biotypes, respectively. Five sizes of glass beads were tested for acceptance: diameter 0.5, 0.75, 1.0, 1.5 and 2.0 mm. The acceptance of a host model was determined by persistent attempted drilling of a glass bead by a female. The relationship between host egg size and number of eggs laid by a female was also investigated. We used three sizes of artificial egg (diameter 0.75, 1.00, and 1.50 mm of hemispherical cupules) each containing artificial diet. Ha biotype wasps accepted host models in the range 0.75-1.50 mm dia. (vol. 0.166-1.325 mu l), whereas those of the Sc biotype accepted host models in the range 0.50-1.00 mm dia. (vol. 0.05-0.393 mu l). This evidence suggests a lineal (possibly genetic) influence to host size acceptance for T. australicum, dependent on the size of the host in which the wasp has been reared. Also T. australicum lay fewer eggs in smaller artificial eggs than in larger ones. The role of host size in host acceptance and number of eggs delivered, and its implications, is discussed.
Keyword Entomology
Host Acceptance
Model Host
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collection: Centre for Microscopy and Microanalysis Publications
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Created: Tue, 10 Jun 2008, 15:11:52 EST