DIGITALNA ARHIVA ŠUMARSKOG LISTA
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| ŠUMARSKI LIST 11-12/2019 str. 18 <-- 18 --> PDF |
on the frons and a specific button-shaped hump at the abdominal sternum three (Figure 1), which is one of the identification characteristics (Pfeffer, 1995). The gender of the bark beetle can be determined by sound as only the female stridulates (Scholz, 1905). Females produce sound using a gula-prosternal stridulation method (Barr, 1969; Dobai, 2017). Signs indicating the presence of the Birch bark beetle are holes on the bark located along the oviposition gallery (Figure 2). These holes may serve for mating locations (Trédl, 1915a; Trédl, 1915b; Munro, 1926; Kovačević, 1956) or for ventilation – humidity regulation (Melnikova, 1964). The holes, 2.0 – 2.5 mm in diameter, on the trunk are spaced along a vertical line up to 20 cm long (Trédl, 1915a; Trédl, 1915b; Melnikova, 1964; Zúbrik et al., 2013). Birch |