Catches of Ips duplicatus and other non-target Coleoptera by Ips typographus pheromone trapping

Abstract

Catches of non-target Coleoptera in Ips typographus pheromone traps baited with Ipslure® were analysed along a geographic gradient running from southwestern Finland to eastern Finland and Russian Karelia. Besides I. typographus, two other bark beetles, Pityogenes chalcographus and Ips duplicatus were caught in high numbers. I. duplicatus occurred on northeastern sites only, suggesting a more restricted distribution than previously known. High numbers of Thanasimus spp. beetles indicate that I. typographus pheromone is also an effective attractant for bark beetle predators. In addition, the originally North American ambrosia beetle Gnathotrichus materiarius, now widely spread in Europe was found for the first time in nature in Finland.