Exploitation of kairomones and synomones by Medetera spp. (Diptera: Dolichopodidae), predators of spruce bark beetles
| Autor: | Marc Pollet, Karel Ubik, Jiri Hulcr, Jan Vrkoč |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2005 |
| Předmět: |
Bark beetle
predator medeteramelancholica medetera setiventris Dolichopodidae pityogenes chalcographus Botany dolichopodidae Semiochemical biology semiochemicals kairomones monoterpenes Picea abies biology.organism_classification ips typographus volatiles QL1-991 Insect Science Curculionidae Kairomone Sex pheromone Pheromone pheromones picea abies Zoology |
| Zdroj: | European Journal of Entomology, Vol 102, Iss 4, Pp 655-662 (2005) |
| ISSN: | 1802-8829 1210-5759 |
| Popis: | The semiochemical relationships in a predator-prey-host plant system were studied by a series of multiple-choice field assays. The studied system included predatory flies of the genus Medetera (Diptera: Dolichopodidae), the bark beetles Ips typogra- phus and Pityogenes chalcographus (Coleoptera: Curculionidae: Scolytinae) as prey and Norwegian spruce (Picea abies) as the host plant. Of the nine species of predators collected, only M. setiventris and M. melancholica provided sufficient data for statistical analysis. The response of the predators to monoterpenic products of the host (alpha-pinene, limonene, camphor), pheromone com- pounds of I. typographus (S-cis-verbenol and 2-methyl-3-buten-2-ol) and a mixture of the pheromones of I. typographus and P. chal- cographus were investigated. Our field trials revealed that tree volatiles plus pheromones of the prey, and a pheromone mixture of both prey species were considerably more attractive to M. setiventris and M. melancholica than the individual chemicals. Medetera seem to respond to the stage of tree decay and the intensity of bark beetle infestation via the ratios of tree volatiles and/or prey pheromones. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|