Attack behavior and host size selection by Diglyphus begini on Liriomyza trifolii in chrysanthemum

Heinz, K.M. and Parrella , M.P. (1989) Attack behavior and host size selection by Diglyphus begini on Liriomyza trifolii in chrysanthemum. Entomologia Experimentalis et Applicata, 53 (2). pp. 147-156.

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Diglyphus begini (Ashmead) (Hymenoptera: Eulophidae) is a larval ectoparasitoid of the leafminer, Liriomyza trifolii (Burgess) (Diptera: Agromyzidae). Female wasps oviposit on larvae which are significantly larger than larvae utilized for host feeding or hosts rejected for oviposition or feeding. Host size is evaluated on a relative rather than absolute basis. Individual female reproductive success increases with host size because of accompanying increases in offspring survivorship and adult body size. The number and duration of parasitoid stings is significantly greater when host feeding compared to oviposition and host rejection due to extensive probing of the internal viscera of larvae with the female ovipositor when host feeding. Upon host paralysis, 47.5% of parasitoid eggs become displaced from their host. However, eggs experimentally placed a mean distance of 0.8 mm away from a host do not result in a reduction in offspring survivorship compared to eggs attached to a host.

Item Type: Article
Uncontrolled Keywords: Oviposition;rejection;feeding;parasitization;parasitoid-host interaction;body size;survivorship
Author Affiliation: Department of Entomology, University of California, Riverside, CA 92521, USA
Subjects: Plant Protection
Divisions: General
Depositing User: Mr Siva Shankar
Date Deposited: 25 Apr 2012 07:35
Last Modified: 25 Apr 2012 07:35
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