Natural decay resistance (wood durability)

O presente trabalho avaliou a resistência natural das madeiras de Aspidosperma desmanthum (Araracanga), Parinari excelsa (Parinari), Mouriri callocarpa (Miraúba), Marmaroxylon racemosum (Angelim-rajado), Peltogyne paniculata (Roxinho) e Astronium sp. (Muiracatiara) aos fungos causadores de podridão-branca Pycnoporus sanguineus e podridão-parda Gloeophyllum trabeum, em ensaios de laboratório. A determinação da resistência natural foi feita por meio da avaliação da perda de massa, com base na norma da American Society for Testing and Materials - Standard Method for Accelerated Laboratory Test of Natural Decay Resistance of Woods - ASTM D2017/81(86). Todas as espécies se apresentaram muito resistentes aos fungos Pycnoporus sanguineus e Gloeophyllum trabeum, exceto Aspidosperma desmanthum que mostrou ser resistente ao fungo de podridão parda. A espécie Peltogyne paniculata mostrou-se a mais resistente ao fungo Pycnoporus sanguineus, enquanto Parinari excelsa apresentou-se como a espécie de menor resistência. A maior resistência ao fungo Gloeophyllum trabeum foi observada para a madeira de Astronium sp., enquanto que a espécie Aspidosperma desmanthum se mostrou como a menos resistente.

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Natural Decay Resistance of Wood

Biological Transformation of Wood by Microorganisms ◽

10.1007/978-3-642-85778-2_9 ◽

1975 ◽

pp. 103-117 ◽

Cited By ~ 3

Author(s):

E. W. B. Da Costa

Keyword(s):

Decay Resistance ◽

Natural Decay

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Laboratory Evaluation of Natural Decay Resistance and Efficacy of CCA-Treated Rubberwood (Hevea brasiliensis Muell. Arg.)

Holzforschung ◽

10.1515/hf.2001.041 ◽

2001 ◽

Vol 55 (3) ◽

pp. 250-254 ◽

Cited By ~ 8

Author(s):

Ismail Jusoh ◽

D. Pascal Kamdem

Keyword(s):

Weight Loss ◽

Soft Rot ◽

Decay Resistance ◽

Raw Material ◽

White Rot ◽

Laboratory Evaluation ◽

Average Weight ◽

Irpex Lacteus ◽

Decay Fungi ◽

Natural Decay

Summary Information on the natural decay resistance and efficacy of CCA-treated rubberwood is important for the development rubberwood industry. The purpose of this study was to determine the natural decay resistance of rubberwood and the efficacy of CCA-pressure treatment in order to explore a new opportunity for this abundant raw material. Natural decay resistance and efficacy of CCA was estimated using soil-block test according to AWPA E10-91. Cubes were exposed to six wood-decay fungi: two each from white, brown, and soft rot. The moisture content of test cubes exposed to Irpex lacteus and Trametes versicolor increased with weight loss increase, while that exposed to Gloeophyllum trabeum and Postia placenta decreased. After a 12-week incubation period the average weight loss by white rot and brown rot fungi was about 1.5 times higher than that of soft rot fungi. CCA retention of 4.1 kg/m3 reduced weight loss to between 8% and 10%, retention of 14.5 kg/m3 protected weight loss by all test fungi from exceeding 2%.

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Natural decay resistance ofEysenhardtia polystachya(Ortega) Sarg.

International Wood Products Journal ◽

10.1179/2042645310y.0000000002 ◽

2010 ◽

Vol 1 (2) ◽

pp. 81-84 ◽

Cited By ~ 3

Author(s):

P. A. Torres Andrade ◽

M. G. Lomelí Ramírez ◽

F. López Dellamary ◽

F. J. Fuentes Talavera ◽

H. G. Richter ◽

...

Keyword(s):

Decay Resistance ◽

Natural Decay

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Natural Decay Resistance of Acacia auriculiformis Cunn. ex. Benth and Dalbergia sissoo Roxb

Bangladesh Journal of Scientific and Industrial Research ◽

10.3329/bjsir.v46i2.8189 ◽

1970 ◽

Vol 46 (2) ◽

pp. 225-230 ◽

Cited By ~ 3

Author(s):

M Ashaduzzaman ◽

AK Das ◽

I Kayes ◽

MI Shams

Keyword(s):

Weight Loss ◽

Decay Resistance ◽

Test Method ◽

White Rot ◽

Acacia Auriculiformis ◽

White Rot Fungus ◽

Timber Species ◽

Dalbergia Sissoo ◽

Decay Test ◽

Natural Decay

Natural decay resistance of two fast growing timber species, Acacia auriculiformis Cunn. ex. Benth. and Dalbergia sissoo Roxb. grown in Bangladesh was evaluated by adopting an accelerated decay test method. The wood specimens were exposed to a white rot fungus, Schizophyllum communie for 12 weeks. The natural decay resistance was determined by the weight loss percentage of the tested wood specimens. The weight losses were found 2.0% and 4.37% in heartwood, and 22.19% and 13.61% in sapwood of A. auriculiformis and D. sissoo, respectively. In both the species, the weight loss was significantly higher in sapwood than heartwood. This means that heartwood was more resistant than sapwood. The weight loss significantly increased from bottom to top. Significant variation has been observed in weight loss between A. auriculiformis and D. sissoo both in heartwood and sapwood. The wood of A. auriculiformis and D. sissoo were classified as naturally durable following the standard classification of natural durability. Key words: Decay resistance; Acacia auriculiformis; Dalbergia sissoo; Schizophyllum communie; Accelerated decay test DOI: http://dx.doi.org/10.3329/bjsir.v46i2.8189 Bangladesh J. Sci. Ind. Res. 46(2), 225-230, 2011

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Highly heritable heartwood properties of Scots pine: possibilities for selective seed harvest in seed orchards

Canadian Journal of Forest Research ◽

10.1139/x11-116 ◽

2011 ◽

Vol 41 (10) ◽

pp. 1993-2000 ◽

Cited By ~ 7

Author(s):

Jouni Partanen ◽

Anni M. Harju ◽

Martti Venäläinen ◽

Katri Kärkkäinen

Keyword(s):

Scots Pine ◽

Monomethyl Ether ◽

Decay Resistance ◽

Mature Trees ◽

Seed Orchards ◽

The Family ◽

Seed Harvest ◽

Active Defence ◽

Natural Decay ◽

Selective Collection

The stilbenes pinosylvin (PS) and its monomethyl ether (PSM) provide natural decay resistance to Scots pine ( Pinus sylvestris L.) heartwood timber. For growing trees, the inducible stilbene production serves as a defence against biotic and abiotic stresses. To improve the potential of reforestation material to produce stilbenes, we assessed the possibilities of selective harvesting from seed orchards. Half-sib progenies growing in a field trial and their grafted mothers in seed orchards were surveyed for several chemical and dimensional heartwood characteristics. The correlations between the clonal means of grafted mothers and the family means of their progenies were high for concentration of PS (r = 0.83, p = 0.000) and PSM (r = 0.60, p = 0.010) and for heartwood density (r = 0.72, p = 0.001). For these traits, the narrow-sense heritabilities (h2) estimated from the progeny trial and the broad-sense heritabilities (H2) in seed orchards were high as well. For the concentration of PS, both h2 (0.67) and H2 (0.81) showed the highest values of any trait. The selective collection of Scots pine seed from seed orchards is a promising way to obtain seedlings that possess genetic potential for active defence and to produce high-quality heartwood as mature trees.

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