The large pine weevil (Hylobius abietis) is an important pest of coniferous reforestation forests. The purpose of the diploma thesis was to confirm the presence and determine the abundance of this species in the Forest management unit Vrbovec (OE ZGS Kočevje), to test the effectiveness of attracting of three different tree species, namely red pine (Pinus sylvestris), spruce (Picea abies) and fir (Abies alba), in combination with ethanol, and to analyze by-catches with emphasis on the bark beetles (Curculionidae: Scolytinae). Monitoring took place over 8 weeks, from 3 April 2020 to 29 May 2020, at four different locations where sanitary felling of spruce (Picea abies) was carried out shortly before the start of the study. We used traps we made ourselves. A total of 3729 specimens of beetles (Coleoptera) were caught. The largest share in the catch (46.8%) was represented by beetles from the family Curculionidae. 1022 specimens of the large pine weevil (Hylobius abietis) were caught. Most specimens (415) were caught in a traps with a twigs of red pine, followed by traps equipped with spruce twigs (387), and the least specimens of Hylobius abietis (220) were caught in a traps with spruce twigs. There were no statistically significant differences in catches between traps with red pine twigs and fir, but the catch in these traps was statistically significantly higher than the catch in traps equipped with spruce twigs. Bark beetles were represented in the catch by 702 individuals. The most numerous were Hylurgus palliatus, Dryocoetes autographus and beetles from the genus Hylastes. We also caught two non-native species, namely Gnathotrichus materiarius and Xylosandrus germanus
|
