〔報告〕日光の歴史的木造建造物における新たな害虫モニタリング手法の実用性の検討

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Surveys by use of adhesive tapes have been conducted since cases of damage of wooden historic buildings in Nikko,Tochigi prefecture, by Anobiids,wood-boring insects, were found in 2008. In the present report,the results of investigation of an insect trapping method based on the principle that flying insects are collected by use of collision panels was conducted in wooden historic buildings in Nikko.The purpose of this investigation was to examine the feasibility of this method as a new survey method in wooden historic buildings. An insect trapping survey using conventional adhesive tapes was also conducted in the same wooden historic buildings. The method that makes use of flight interception traps (FIT)allowed identification of insects more easily than adhesive tapes because no adhesive was attached to insects. It also allowed capture of some Anobiids alive. As a result, it was found that Sculptotheca hilleri was the most abundant insect captured on adhesive tapes. As in the survey in 2010, the loft of Shinkyusha in Toshogu Shrine was the place where the highest number of S. hilleri was trapped.Though there isroom for improvement of the method that makes use of FIT,it is feasible as a new method for surveying of insects in wooden historic buildings. Wood-boring insects captured alive can be used as “test insects”for observation of the ecology and elucidation of the life history of these insects for which no rearing method has been established as well as for testing chemical treatments. Finally, this method is applicable to future studies on measures for damage by insects in the field of cultural properties.

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