Partenaires et organisations internationales
(Anglais)
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A, B, CZ, DK, FIN, F, D, H, IS, IRL, I, LT, NL, N, PL, P, RO, SK, E, S, CH, GB Centre for Agricultural and Biological Sciences CABI, Delémont University for Agricultural Sciences BOKU, Vienna Swiss Federal Research Station for Agroecology and Agriculture FAL, Zürich-Reckenholz
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Résumé des résultats (Abstract)
(Anglais)
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This project, embedded in COST action E 16, constitutes a part of a Ph.D. thesis supervised by WSL and ETH Zürich. It investigates the dynamics of natural enemies within two bark beetle infestation spots without any human control measurements. During three years insects were sampled at regular intervals from infested spruce trees. Bark beetles as well as associated predators, parasitoids, entomopathogenic fungi, and micro-organisms were identified and quantified. In addition, all potential host trees around the infestation spots were mapped in order to monitor the spatial and temporal development of the infestation. Apart from some specific families of beetles, flies, and parasitic wasps most insect material has been identified. This will be the basis for the data analysis in 2003. Among the fungi, Beauveria bassiana has already been identified to be the most common pathogen. Bark beetle mortality imposed by this pathogen tended to increase from 14 to 58 % over the years under study.
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