Primary attraction and host tree selection in deciduous and conifer living Coleoptera: Scolytidae, Curculionidae, Cerambycidae and Lymexylidae

Authors


Department of Zoology/Ecology, University of Tromsø, N-9037 Tromsø, Norway

Zoology Department. Tromsø Museum, University of Tromsø, N-9037 Tromsø, Norway

Abstract

Abstract: Primary attraction and host tree selection among bark and wood living Coleoptera were investigated in this research. The experiments were carried out in Dividalen, Troms County, and lasted from May to August, in 1993 and 1994. Beetles living in deciduous trees were the main objects of the present study. Trap type used excluded pheromones in the host tree selection. The traps were placed in areas dominated by Scots pine (Pinus sylvestis) and birch (Betula pubescens), and areas that contained both tree species. The traps were baited with billets of Betula pubescens, Alnus incana and Pinus sylvestris. Empty traps were used as controls. Beetle species found to have both primary attraction and host tree selection prior to landing were the conifer living Tomicus piniperda, Hylastes brunneus, Pityogenes quadridens, Pissodes pini, Hylobius abietis, Magdalis phlegmatica, and the deciduous living Magdalis carbonaria, Hylecoetes dermestoides and Rhagium mordax. Also, Scolytus ratzeburgi and Trypodendron signatum were able to distinguish between suitable and unsuitable host tress prior to landing. Ips acuminatus was found to have neither primary attraction nor host tree selection prior to landing, probably because pheromones were excluded in the attraction. According to the literature, the mechanism used in the host selection is mainly olfactory sensing and vision.

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