The non-native ambrosia bark beetle Xylosandrus germanus was found in Slovenia for the first time in 2000. Later research confirmed widespread and massive occurrence of the species in our forests, but the upper limit of occurrence of this species in our country was unknown. The aim of the thesis was therefore to verify the presence and abundance of the non-native bark beetle X. germanus at different altitudes, on the southern slope of Krvavac mountain. On April 19, 2022, 8 cross-vane panel traps with ethanol were set on altitude interval between 798 and 1478 m a.s.l. The traps were emptied at two-week intervals until July 22, 2022. The determination of the catch showed that X. germanus beetles were caught in all eight traps, the catch at 1478 m a.s.l. is thus, according to the data known to us, the highest find of this species in Europe. The catch of X. germanus represented 60.9% of the total catch of beetles (Coleoptera) and 82.7% of the catch of all bark beetles (Scolytinae). Of the other species of bark beetles, the most abundant were native ambrosia species X. saxesenii and A. dispar, with 7.7% and 3.2% of the total catch of bark beetles. Our research confirmed that the population size of the non-native bark beetle X. germanus is extremely large in Slovenian forests, even at altitudes where this has not been found until now. Despite the extremely large population found, no signs of attack or damage caused by this species were discovered in our research area.
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