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The subjectivity of the estimation of natural wood’s resistance to destruction by termites based on visual assessment in laboratory tests

Krajewski Adam, Witomski Piotr, Oleksiewicz Anna

Drewno : prace naukowe, doniesienia, komunikaty

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2021

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vol. 64, nr 207

159--166

EN

This study concerns visual assessment of the degree of damage done to Pinus sylvestris L. wood blocks by Reticulitermes lucifugus Rossi, in an experiment conducted according to ASTM D 3345-08:2017. The six evaluators made their assessments individually. The differing results obtained from the evaluators are a cause for concern. Visual assessment of the degree of wood damage can vary significantly from person to person. Measurement of weight loss seems to be a better way of evaluating the degree of damage done to wood samples by termites in laboratory tests.

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Some problems in the results assessment in laboratory evaluation of wood for resistance to termites based on visual ratings of attack on test blocks

Krajewski A., Oleksiewicz A., Witomski P.

Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

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2018

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No. 103

181--184

EN

The aim of the work is to check the visual assessment of the degree of damage to Pinus sylvestris L. wood blocks by Reticulitermes lucifugus Rossi in an experiment made according to ASTM D 3345-08 [2009]. The three evaluator made the assessment individually. The differing results obtained by the three evaluator give food for thought. The varied results of the three evaluator assessments it gave rise to thoughts. The visual assessment of the degree of wood damage done by different people can vary significantly.

PL

Celem pracy jest sprawdzenie zgodności oceny wizualnej stopnia uszkodzenia klocków drewna Pinus sylvestris L. przez Reticulitermes lucifugus Ross w doświadczeniu zrobionym według ASTM D 3345-08 (2009). Ocenę zrobili indywidualnie trzej współautorzy. Różniące się wyniki uzyskane przez trzech współautorów dają wiele do myślenia. Wizualna ocena stopnia uszkodzenia drewna przez termity wykonana przez różne osoby może się istotnie różnić.

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The susceptibility of neolithic waterlogged beech wood (Fagus sylvatica L.) to destruction by Reticulitermes lucifugus Rossi

Krajewski A., Lisiecka E., Drożdżek M., Witomski P., Wójcik A.

Drewno : prace naukowe, doniesienia, komunikaty

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2015

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vol. 58, nr 195

59--68

EN

The article presents the results of a test on the resistance of Neolithic waterlogged beech wood (Fagus sylvatica L.) to destruction by subterranean Reticulitermes lucifugus Rossi. Methodology consistent with the ASTM D 3345-08 Standard was applied in the experiment. In the coercion test, the modern beech wood was destroyed at an intermediate stage between light attack and moderate attack with penetration, whereas the pine sapwood was heavily damaged. Under the same conditions, the waterlogged beech wood was seriously damaged or completely destroyed by the termites. However, unlike the modern pine and beech wood, all the termites died after feeding on the waterlogged beech wood. In spite of the complete destruction of the waterlogged beech wood in the coercion test, it seems that under natural conditions where there is a possible choice between different wood species, the infestation by termites of waterlogged wood uncovered in archaeological work does not necessarily happen. Wood containing few nutritional substances and substantial lignin, as well as having a high moisture content facilitating the development of parasitic microorganisms, will deter termites.