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Field tests out of ground contact in France: Definition of the test procedure and preliminary results after 18 months
1981 - IRG/WP 2161
M Fougerousse


Laboratory tests on the natural durability of timber methods and problems
1984 - IRG/WP 2217
In literature a large variety of test methods is mentioned to examine the natural resistance of timber against fungal attack. This concerns the kind of sampling as well as the test procedure, the test fungi, the duration of test, and the classification of the resistance according to the test results. These variations, however, are of great influence on the test result. Long term exposure will lead to a further differentiation of timber species to be generally known as "resistant".
H Willeitner


Destruction of two tropical timbers by marine borers and micro-organisms in Goa waters (India)
1992 - IRG/WP 92-4176
The paper deals with the pattern of microbial attack in relation to marine borer damage of test panels of African rosewood and Brazilian jackwood exposed in Goa waters (Western India) for a period of seven months. The degradation of wood cell walls in both the timber samples occurred due to infestation of soft-rot fungi and tunnelling bacteria. African rosewood, which was severely damaged by teredinids and pholads, was also heavily degraded by both soft-rot fungi and tunnelling bacteria. In contrast, Brazilian jackwood, which effectively resisted teredinids and was only mildly attacked by pholads, was also less severely degraded by the above microorganisms. Thus, the study demonstrates a close parallel between the activity of marine borers and wood-degrading microorganisms present in the cell walls of the wood samples examined.
L N Santhakumaran, A P Singh