Five mature Norway spruce trees in an area which had ongoing attacks of Ips typographus over several years, were baited with dispensers containing the pheromone of Ips typographus. The dispensers were removed after 2 days. Control trees were selected in a nearby stand. Ten flight-barriere traps were attached to the trunk of each tree at different heights. Four of the trees were infested and killed by Ips typographus, but the intensity of infestation on each single tree varied in time during the summer. Totally 48.422 Ips typographus were trapped. Nineteen other bark beetle species, known to breed in Norway spruce, were trapped. Sixteen of these were caught in higher number at infestet compared to uninfested trees. Crypturgus cinereus and Crypturgus subcribrosus were attracted in large numbers, the former had a main flight period two to three weeks earlier than the latter. Species of Epuraea were also trapped in large numbers, Epuraea muehli mainly early in the season, whereas Epuraea thoracia and Epuraea terminalis had later flight periods. A total of 37.912 Coleopterous speciments other than Ips typographus, were caught. The mean number of specimens caught per infested tree was 9478, while the corresponding figure per uninfested tree was 297. All Coleopterous species were identified except specimens of the families Staphylinidae, Latridiidae and some other families of less relevance. The number of species directly associated with, or benefitting from Ips typographus were 92.
453 (Insekten [Für die weitere Unterteilung siehe Familien unter 14 oder alternativ (beschrieben nach Regelfall 1d in der Einleitung) können die Nummern alphabethisch nach Familien und Arten unterteilt werden (Appendix C)]) 145.7x19.92 (Scolytidae) 174.7 (Coniferae [Siehe Anhang D]) 413.1 (Fangen mit gleichzeitiger oder nachfolgender Vernichtung)
