スギノアカネトラカミキリ被害材の強度性能（第1報）ヒノキ正角材の材面の食害程度と強度との関係

摘要

スギノアカネトラカミキリは，枯枝から侵入し 生立木の幹内部を食害し，大きな変色，時に腐朽 を発生させるスギ，ヒノキの害虫である。鳥取県 内の森林でも被害があり，特に枝打ちの遅れた林 分での被害が多いことから，保育のされていない 林分での被害拡大が懸念される。%We investigated the relationship between the damage level of the surface and the strength property using the square timbers of hinoki (Chamaecyparis obtuse) which were damaged by insects (Anaglyptus subfasciatus). As the result, there was no relationship between damage level and dynamic Young's modulus by longitudinal vibration, shear modulus, modulus of elasticity (MOE) or modulus of rupture (MOR). Both MOE and MOR were the same property as the data collected from all over Japan, and fifth percentile value of MOR was higher than referenced strength.