Journal of Applied Entomology (2006) 130, 275-283
J. Hulcr, K. Ubik and J. Vrkoc (2006)
The role of semiochemicals in tritrophic interactions between the spruce bark beetle Ips typographus, its predators and infested spruce
Journal of Applied Entomology 130 (5), 275-283
Abstract: Semiochemical interactions between the spruce bark beetle Ips typographus, its predators Medetera setiventris, Thanasimus formicarius and Thanasimus femoralis, and the host Norway spruce, Picea abies, were studied in the field. The chemicals S-cis-verbenol, 2-methyl-3-buten-2-ol, ipsdienol, (+)-alpha-pinene, (−)-alpha-pinene, (±)-alpha-pinene, limonene, camphor and their naturally occuring mixtures were used as trap baits in a multiple-choice design that allowed for comparison of their attractivity for the focal species. Medetera was attracted to both the prey aggregation pheromone and its multifunctional component, ipsdienol. On the contrary, both Thanasimus species responded predominantly to ipsdienol and less to the prey aggregation pheromone. In the case of I. typographus, the attractivity of aggregation pheromone seems to be increased by the addition of a mixture of monoterpenic tree volatiles, and by addition of ipsdienol. Bark beetles and predators showed species-specific responses to volatile mixtures representing different stages of tree decay and different stages of bark beetle colony establishment. These responses correlates with the optimal foraging habitat of each species. None of the predator species responded to 2-methyl-3-buten-2-ol, a substantial component of I. typographus pheromonal bouquet, thus it is hypothesized that only substances of monoterpenic origin attract predators.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Jiri Hulcr
Research topic(s) for pests/diseases/weeds:
pheromones/attractants/traps
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
environment/habitat manipulation
Pest and/or beneficial records:
| Beneficial | Pest/Disease/Weed | Crop/Product | Country | Quarant.
|
|---|---|---|---|---|
| Ips typographus | Spruce (Picea) | |||
| Thanasimus formicarius (predator) | Ips typographus | Spruce (Picea) | ||
| Thanasimus femoralis (predator) | Ips typographus | Spruce (Picea) | ||
| Medetera setiventris (predator) | Ips typographus | Spruce (Picea) |
