<abstract xmlns="http://www.w3.org/1999/xhtml"><p>This study focused on the occurrence of xylophagous beetles and nematodes in the different parts of <italic>Pinus sylvestris</italic> L. trees of different health condition in the pure stands in Zhytomyr region (Central Polissya). Stem fragments with thin, thick and transitional bark, branches and twigs were examined in each of 12 model trees. Xylophagous beetles were identified by adults or by galleries. Nematodes were isolated from wood samples in the laboratory using the Baermann method and identified by morphometric characteristics. Among 10 species of xylophagous beetles, <italic>Ips acuminatus</italic> (frequency 16.7%; dominance 17.9%) and <italic>I. sexdentatus</italic> (frequency 11.1%, dominance 54.6%) dominated, which prefer the fragments with thin and thick bark respectively. No xylophagous beetle was found in the healthy and slightly weakened trees. Among 15 nematode species, 40% were saproxylic, 33.3% entomophilic, 13.3% phytophagous, and by 6.7% predators and species associated with fungi. An entomophilic nematodes <italic>Cryptaphelenchus macrogaster</italic> f. <italic>acuminati</italic> was common in all parts of stem and branches (frequency of occurrence 25–33.3%). An entomophilic nematodes <italic>Parasitorhabditis acuminati</italic> and a predator <italic>Fuchsia buetschlii acuminati</italic> had the highest frequency of occurrence (41.7%) under the thin bark and in the branches. The frequency of these species in colonized with xylophagous insects stem fragments with thin bark was significantly higher than in respective not colonized fragments.</p></abstract>

This study focused on the occurrence of xylophagous beetles and nematodes in the different parts of Pinus sylvestris L. trees of different health condition in the pure stands in Zhytomyr region (Central Polissya). Stem fragments with thin, thick and transitional bark, branches and twigs were examined in each of 12 model trees. Xylophagous beetles were identified by adults or by galleries. Nematodes were isolated from wood samples in the laboratory using the Baermann method and identified by morphometric characteristics. Among 10 species of xylophagous beetles, Ips acuminatus (frequency 16.7%; dominance 17.9%) and I. sexdentatus (frequency 11.1%, dominance 54.6%) dominated, which prefer the fragments with thin and thick bark respectively. No xylophagous beetle was found in the healthy and slightly weakened trees. Among 15 nematode species, 40% were saproxylic, 33.3% entomophilic, 13.3% phytophagous, and by 6.7% predators and species associated with fungi. An entomophilic nematodes Cryptaphelenchus macrogaster f. acuminati was common in all parts of stem and branches (frequency of occurrence 25–33.3%). An entomophilic nematodes Parasitorhabditis acuminati and a predator Fuchsia buetschlii acuminati had the highest frequency of occurrence (41.7%) under the thin bark and in the branches. The frequency of these species in colonized with xylophagous insects stem fragments with thin bark was significantly higher than in respective not colonized fragments.

Beetles and nematodes associated with wither Scots pines

Zhytomyr National Agroecological University

Chernigiv National University of Technology

Central European Forestry Journal

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

{"article-title":"Beetles and nematodes associated with wither Scots pines"}

This study focused on the occurrence of xylophagous beetles and nematodes in the different parts of Pinus sylvestris L. trees of different health condition in...

Beetles and nematodes associated with wither Scots pines

Publié en ligne: 27 févr. 2020

Pages: 49 - 59

DOI: https://doi.org/10.2478/forj-2020-0001

Mots clés
entomophilic nematodes, phytophagous nematodes, predator, saproxylic nematode

© 2020 Olena Andreieva et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Beetles and nematodes associated with wither Scots pines

Publié en ligne: 27 févr. 2020

Pages: 49 - 59

DOI: https://doi.org/10.2478/forj-2020-0001

Mots clésentomophilic nematodes, phytophagous nematodes, predator, saproxylic nematode

© 2020 Olena Andreieva et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Mots clés
entomophilic nematodes, phytophagous nematodes, predator, saproxylic nematode