, 19:654 | Cite as

Wood durability of home-garden teak against brown-rot and white-rot fungi

  • K. M. BhatEmail author
  • P. K. Thulasidas
  • E. J. Maria Florence
  • K. Jayaraman
Original Article


Natural decay resistance of teak wood grown in home-garden forestry and the factors influencing decay resistance were determined in comparison with that of a typical forest plantation. Accelerated laboratory tests were conducted on 1800 wood samples drawn from 15 trees of three planted sites. Analysis of variance based on a univariate mixed model showed that planted site, fungal species, and their interaction terms were important sources of variation in decay resistance. With increasing decay resistance from centre to periphery of the heartwood, radial position was a critical factor and the interaction effect of fungal species × radial position was significant in influencing the durability. No significant differences were found in decay resistance either between the opposite radii or due to the various possible interaction terms of radii with the site, fungal species and radial position. There were significant differences in decay resistance against brown-rot fungi between wet and dry sites of home-garden teak although differences against white-rot fungi were non-significant among the three planted sites. Polyporus palustris was the more aggressive brown-rot fungus than Gloeophyllum trabeum. The higher susceptibility of wet site home-garden teak to brown-rot decay was associated with a paler colour of the wood and lower extractive content.


Tectona grandis Decay resistance Extractive content Wood colour Mixed effects model Trees outside forest 



We are grateful to Dr. J. K. Sharma, Director (KFRI) for constant encouragement and support. This study was carried out with the sponsorship of the Kerala Forest Department. The cooperation received from the Forest Department in timber sample collection from Karulai, Nilambur South Forest Division, has been very invaluable. We gratefully acknowledge Dr. M. Balasundaran, then Scientist-in-Charge of Pathology Division (KFRI) and Late Prof. Takashi Okuyama for extending the facilities to carry out the wood decay studies and colour measurement in the Department of Bio-material Physics, School of Bio-agricultural Sciences, Nagoya University, Japan, respectively. Our sincere thanks are due to Mr. T. S. Baburaj, Research Fellow for the help rendered in various ways in the pathology laboratory. The able technical assistance rendered by Mr. K. K. Suresh and Mr. K. Praveen, Forest Utilisation Division in the laboratory investigation is acknowledged. We are grateful to Prof. Everett Hansen (Oregon State University) and Prof. Adam M. Taylor for their valuable comments in improving the manuscript.


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Copyright information

© Springer-Verlag 2005

Authors and Affiliations

  • K. M. Bhat
    • 1
    Email author
  • P. K. Thulasidas
    • 1
  • E. J. Maria Florence
    • 2
  • K. Jayaraman
    • 3
  1. 1.Division of Forest UtilisationKerala Forest Research InstitutePeechiIndia
  2. 2.Division of Extension and TrainingKerala Forest Research InstitutePeechiIndia
  3. 3.Division of Forest Information Management SystemKerala Forest Research InstitutePeechiIndia

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