Distribution pattern of entry holes of the tree-killing bark beetle Polygraphus proximus
Cite this dataset
Takagi, Etsuro; Takei, Shin-ya; Köbayashi, Kenta (2021). Distribution pattern of entry holes of the tree-killing bark beetle Polygraphus proximus [Dataset]. Dryad. https://doi.org/10.5061/dryad.76hdr7svh
Bark beetles attack their hosts at uniform intervals to avoid intraspecific competition in the phloem. Bark texture and phloem thickness also affect bark beetle attacks, and the bark characteristics are not spatially homogeneous; therefore, the distribution patterns of entry holes can demonstrate an aggregated distribution.
We cut down two A. veitchii trees at Yatsugatake Forest Station, Mountain Science Center, University of Tsukuba, in Minamisaku County, Nagano Prefecture, Japan on July 7, 2020, and immediately peeled the bark. We randomly selected 18 knots and measured the phloem thickness of rough bark around the knots and that of the remaining bark near the knots.
Japan Society for the Promotion of Science
Japan Society for the Promotion of Science, Award: 19K15874