Associations between Pityogenes bidentatus and fungi in young managed Scots pine stands in Poland

Abstract

The association between Pityogenes bidentatus and fungi was studied in young, managed Pinus sylvestris stands in Poland. Fungi were isolated from emerged adults and their galleries collected from four populations. In total, 2089 fungal isolates including 42 species, were obtained. Penicillium sp. 1 and Geosmithia sp. 1 were the most commonly isolated fungi from beetles (49% and 41% of beetles respectively). Geosmithia sp. 1 species was the dominant species in P. bidentatus galleries with a frequency of occurrence of 57.9%. Hormonema dematioides was the second most abundant fungus in gallery systems (17.1% of wood samples). Two of the isolated Geosmithia species were previously undescribed. Pityogenes bidentatus also vectored three ophiostomatoid species: Ophiostoma minus, O. piceae and Graphium sp. ÔWÕ. These species were occasionally isolated from beetles and their galleries, suggesting a non-specific relationship.

Diversity of ophiostomatoid fungi associated with bark beetles (Coleoptera: Scolytidae) colonizing branches of Norway spruce (Picea abies) in southern Poland

“…Also, other ophiostomatoid fungi were isolated at very low frequencies. Relatively weak relationships with blue-stain fungi were similar to those recorded for Pityogenes bidentatus (Herbst, 1784) (Jankowiak & Rossa 2008) and P. quadridens (Hartig, 1834) (Mahiesen-Käärik 1953) on Pinus sylvestris L. In Polish studies (Jankowiak & Rossa 2008), P. bidentatus carried ophiostomatoid species very rarely and this bark beetle was frequently associated with fungi of the genus Geosmithia. In our study we also relatively often isolated these fungi from P. pityographus beetles and galleries.…”

Isolation and identification of Sydowia polyspora and its pathogenicity on Pinus yunnanensis in Southwestern China

“…We tried to induce production of perithecia by adding sterilized pine twigs in 2% water agar and 1.5% oatmeal agar (Zhou, De Beer, & Wingfield, ), without success. Although H. dematioides has been reported as fungus associated with bark beetles (Jankowiak & Bilański, ; Jankowiak & Rossa, ; Lieutier et al., ; Masuya et al., ; Solheim & Långström, ), it lacks authentic specimen as well as the sequences of ex‐type strain (Thambugala et al., ); therefore, the 14 strains are determined here as S. polyspora according to the one‐fungus one‐name rule.…”

“…Several studies have reported that H. dematioides could be introduced into host trees by Tomicus species such as T. piniperda and T. minor , as well as other bark beetle species, such as Ips cembrae (Heer), Pityogenes bidentatus (Herbst) and Crypbalus piceae (Ratz.) (Jankowiak & Kolařík, ; Jankowiak & Rossa, ; Jankowiak, Rossa, & Mista, ). In this study, S. polyspora has been isolated from the bark beetles and galleries of T. yunnanensis , which showed that S. polyspora could associate to T. yunnanensis in its lifecycle stage.…”

“…& Melin is a common fungus associated with Tomicus piniperda (L.), T. minor (Hartig) and Pityogenes bidentatus (Herbst) in many countries such as France, Sweden, Japan and Poland. There is hypothesized that the bark beetles may carry the fungal spores during their supplemental feeding in pine shoots and introduce them in the host tissues at the stage of sexual maturation (Jankowiak & Bilański, ; Jankowiak & Rossa, ; Lieutier et al., ; Masuya, Kaneko, & Yamaoka, ; Solheim & Långström, ). Additionally, Hermanides‐Nijhof () assumes that H. dematioides causes sapstain in conifers.…”

Sydowia polyspora Dominates Fungal Communities Carried by Two Tomicus Species in Pine Plantations Threatened by Fusarium circinatum

“…Penicillium spp. have been frequently isolated from several species of bark beetles [53,61,82]. Anemochory is considered the main dispersion method for this genus, being the association between Penicillium sp.…”