日光の歴史的建造物における捕虫テープに捕獲された甲虫の建物内分布の解析と考察

摘要

主要ないくつかの建造物における建物内の捕獲甲虫数の分布を精査することにより，木材を 加害しうる害虫の生息状況の実態とシバンムシの生態が明らかになってきた。今年度の現地調 査でもいくつかのシバンムシ科甲虫の光による誘引性が指摘されており9），二天門においては 光に誘引された結果?入口に近い自然光が入る場所で捕獲甲虫数が集中したと考えられる。%A survey was conducted in some historic buildings in Nikko in 2009 using adhesive traps to clarify insect species that cause damage on historic buildings. Some characteristic species of Anobiidae were found as timber pests. Priobium cylingricum was trapped at Sambutsu-do of Rinnohji temple while Trichodesma japonicum and Sculptotheca hilleri were trapped at Daiyu-in Nitenmon. Large-scale survey in historic buildings in Nikko was conducted in 2010. About 27,000 adhesive traps were used for surveys in the loft and basement space of 72 historic wooden buildings. As a result, reality of living conditions of the Anobiids that can harm the buildings in the whole area was revealed. Hadrobregmus pertinax and Oligomerus japonicus, which were not found in the previous year, were also found in 2010. It is assumed that Anobiidae inhabit the entire Nikko area. The distribution of pests in some major buildings have been scrutinized by previous large-scale survey data. As a result, some correspondences have been found with the results of visual survey of damage to building materials. Interesting ecological characteristics of wood-boring beetles were shown from the data, including light attraction. Those data can be useful for future treatments such as fumigation, as well as for restoration and conservation.