Abstract
The assemblage and abundance of fungal species associated with <em>Hylurgops palliatus</em> on <em>Pinus sylvestris</em>, were studied in Poland. Fungi were isolated from beetles of <em>H. palliatus</em> and their galleries collected from three populations. In total, 1832 fungal isolates, including 38 species, were obtained. The most important group of fungi were the ophiostomatoid fungi. Among the seven species of ophiostomatoid fungi isolated, <em>Leptographium lundbergii</em> and an unknown species of <em>Graphium</em> sp. code-named "W" were the dominant species. <em>Ophiostoma minus</em> and <em>O. piceae</em> were also relatively common. All ophiostomatoid species, except <em>L. lundbergii</em> occurred more frequently on the overwintered adults than in gallery systems. <em>Ophiostoma minus</em> and <em>O. piliferum</em> are documented here as new associates of <em>H. palliatus</em>.
Highlights
Many species of fungi are known to be associated with bark beetles (Kirisits 2004; Upadhyay 1981)
The ophiostomatoid fungi were the most common fungal associates of the H. palliatus and they were represented by seven species
In contrast to Kotýnková-Sychrovás investigations, Wingfield and Gibbs (1991) reported a wide variety of Leptographium and Graphium species to be associated with H. palliatus in England
Summary
Many species of fungi are known to be associated with bark beetles (Kirisits 2004; Upadhyay 1981). Blue-stain fungi, especially ophiostomatoid species, are most frequently associated with bark beetles infesting coniferous trees (Wingfield et al 1993). These fungi are an important fungal group because they cause blue-staining in freshly cut logs and some of them are capable of killing mature trees (Harrington 1993). Hylurgops palliatus (Gyll.) is not considered to be an economically important pest in its natural range because it infests logs, stumps and dead or dying trees. The beetles disseminate the spores of the blue-stain fungi. Among the ophiostomatoid fungi transmitted by H. palliatus, there are pathogenic fungi which may play a role in overcoming the resistance of trees attacked by the beetles (Kiristis 2004)
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