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Studies on changes in host suitability of Lymantria dispar (Lepidoptera, Lymantriidae) for the endoparasitic development of Glyptapanteles liparidis (Hymenoptera, Braconidae) by a microsporidian infection.

Project Leader
Schopf Axel, Project Leader
Duration:
01.04.1999-01.04.2001
Type of Research
Basic Research
Project partners
Illinois Natural History Survey, Champaigne, Illinois, United States (USA).
Function of the Project Partner: Partner

Further information: http://ifff.boku.ac.at

Staff
Hoch Gernot, Project Staff
BOKU Research Units
Institute of Forest Entomology, Forest Pathology and Forest Protection
Funded by
Fonds zur Förderung der wissenschaftlichen Forschung (FWF) , Sensengasse 1, 1090 Wien, Austria
Abstract
Investigations on the host-parasitoid-pathogen system Lymantria dispar, Glyptapanteles liparidis, Vairimorpha sp. in a previous research project revealed that the microsporidian infection of the host larva had a negative impact on the development of the endoparasitic wasp without causing infection of the parasitoids themselves. It is the aim of the proposed research to study the causes of this reduced performance of the parasitoid. Therefore, gypsy moth larvae will be inoculated with the microsporidium before or after parasitization. Hemolymph and total insect body samples will be taken at certain intervals and analyzed for changes in the host nutrient content of carbohydrates, amino acids, and lipids, which might consequently lead to malnutrition of G. liparidis larvae. Moreover, the study could yield new insight on the effects of a microsporidian infection on the host's physiology, a topic that is only poorly understood, as well as on the impact of parasitism by G. liparidis on the host¿s amino acids and lipids content which also has not been investigated yet.
Keywords
forest entomology;
Braconidae; Lymantria dispar; Microsporidia; host-parasitoid-pathogen interaction; host suitability;
Publications

Hoch, G. (2009): Microsporidian pathogens of forest Lepidoptera: Ecological and physiological interactions between host and pathogen.
[2nd Entomopathogens and Microbial Control Symposium 2009, Mugla, Turkey, 24.09.2009 - 27.09.2009]

In: Hazir, S. (Ed.), 2nd Entomopathogens and Microbial Control Symposium, 24-27 September 2009, Mugla, Turkey, 42-43

** Hoch, G; Schafellner, C; Henn, MW; Schopf, A Alterations in carbohydrate and fatty acid levels of Lymantria dispar larvae caused by a microsporidian infection and potential adverse effects on a co-occurring endoparasitoid, Glyptapanteles liparidis..

Arch Insect Biochem Physiol. 2002; 50(3):109-120 WoS PubMed FullText FullText_BOKU

** Marktl, R.C., Stauffer, C., Schopf, A. Interspecific competition between the braconid endoparasitoids Glyptapanteles porthetriae and Glyptapanteles liparidis in Lymantria dispar larvae.

Entomologia Experimentalis et Applicata, 105, 97-109 WoS

Vorträge

Hoch, G., Schopf, A. (2000): Physiological aspects of host-parasitoid-microsporidia interactions..

33rd Ann. Meeting of the Society for Invertebrate Pathology, Aug 13-18, Guanajuato, Mexico

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