Primary attraction and host tree selection in deciduous and conifer living Coleoptera: Scolytidae, Curculionidae, Cerambycidae and Lymexylidae.
Primary attraction and host tree selection among bark- and wood- living Coleoptera were investigated during May-August in 1993-94 in Norway. Trap type used excluded pheromones in the host tree selection. The traps were placed in areas dominated by Scots pine (Pinus sylvestris) and birch (Betula pubescens), and areas that contained both tree species. The traps were baited with billets of B. pubescens, Alnus incana and P. sylvestris. Empty traps were used as controls. Tomicus piniperda, Hylastes brunneus, Pityogenes quadridens, Pissodes pini, Hylobius abietis, Magdalis phlegmatica preferred landing on conifer trees, while Magdalis carbonaria, Hylecoetus dermestoides, Scolytus ratzeburgi and Rhagium mordax preferred landing on deciduous trees. Trypodendron signatum and Ips acuminatus was not selective, probably because pheromones were excluded in the attraction. The mechanism used in the host selection is mainly olfactory sensing and vision.