Your search resulted in 1773 documents. Displaying 25 entries per page.
Termite and decay protection - A superficial barrier field test
1983 - IRG/WP 3257
Samples of Pinus radiata were given a superficial barrier treatment and installed in the ground at two sites for five years to observe termite and fungal attack. The three best treatments of the series were Denso petroleum tape, Koppers hot dip tar enamel, and Arquad 2C/75 alkyl ammonium compound. As new fungicides and insecticides become available they are being added to the test using the same s...
R S Johnstone, W D Gardner
Basidiosporogenesis by the white-rot basidiomycetes in vitr
1994 - IRG/WP 94-10081
Basidiospores of all forest-inhabiting basidiomycetes are a primary source of infection causing wood decay. However, most studies evaluating wood preservatives have used mycelia or basidiospores obtained from wild mushrooms. The objective of this study was to demonstrate in vitro methods that promote carpogenesis and basidiosporogenesis by the white-rot basidiomycetes, Schizophyllum commune and Tr...
S C Croan
Options for accelerated boron treatment: A practical review of alternatives
1985 - IRG/WP 3329
Boron wood preservatives are almost exclusively applied by momentary immersion and block diffusion storage. Alternative techniques are described which can be used to accelerate boron treatment. Diffusion coefficients have been derived to define the acceleration of diffusion with increasing temperature. Schedules are described for pressure impregnation of green timber, involving steam conditioning,...
P Vinden, T Fenton, K Nasheri
The effect of treatment method on CCA efficacy in Corsican pine
1992 - IRG/WP 92-3723
As part of a study into the influence of application method on preservative efficacy Corsican pine (Pinus nigra) samples (50 x 50 x 400 mm³) were treated with a CCA formulation using Bethel, Steam/Bethel or Lowry processes. Full penetration of the preservative at a gross level was confirmed using a copper disclosing reagent. The preservative was allowed to fix and then samples were converted into...
P R Newman, R J Murphy
Field trials of anti-sapstain products. Part 1
1991 - IRG/WP 3675
The results obtained in two field tests of anti-sapatain products, carried out in four locations in Portugal, are presented. Boards from freshly cut logs were hand-dipped, close staked and left to dry for periods from four to six months. The results obtained seem to indicate that some of the products tested performed at least as well and sometimes better, than a 3% NaPCP solution which was used as...
L Nunes, F Peixoto, M M Pedroso, J A Santos
Collaborative soft rot tests: Proposals for a standardized soil burial test
1971 - IRG/WP 201
A F Bravery
Report on International Conference on Marine Biodeterioration, Goa, India, January 1986
1986 - IRG/WP 4127
At the International Conference on Marine Biodeterioration - Advanced Techniques Applicable to the Indian Ocean, there were a number of papers relevant to the aims of Working Group IV of IRG. Abstracts of these papers and a brief commentary on the conference are presented....
S M Cragg
The susceptibility of 35 Amazon wood species to Cryptotermes brevis (Walker)
1982 - IRG/WP 1160
Laboratory tests were carried to evaluate the susceptibility of 35 Amazon hardwoods to Cryptotermes brevis (Walker). The results were analysed statistically and showed that five wood species were non resistant, nine were resistant and the other twenty-one in between those classes of resistance....
M D Canedo
Accelerated ageing of preservatives in treated wood
1988 - IRG/WP 3476
New preservatives are tested in the laboratory and often in field tests before they are used commercially. Some preservatives, however, tested in the laboratory do not show the expected stability when used in service. The differences between laboratory tests and practical use can never be completely eliminated but must be minimized as far as possible by relevant testing methods. Studies of the eff...
M-L Edlund, B Henningsson, B Jensen, C-E Sundman
Decay fungi in Finnish houses on the basis of inspection samples from 1978 to 1988
1989 - IRG/WP 1401
A summary of the causes and sources of fungal damages was made on the basis of decay samples and sample information sent to the Forest Products Laboratory of the Technical Research Centre of Finland (VTT) between 1978 and 1988. About 50-130 decay cases in wood structures were studied annually. In almost 50% of all fungusdamage cases the cause was Serpula lacrymans. The proportion of Coniophora put...
L Paajanen, H Viitanen
Contribution to study of the degradation caused in Pinus spp. poles used in field test
1989 - IRG/WP 1417
The study of the degradation produced by soil natural microflora on wood in contact with it in the field, has been going on for several years now. Our contribution to this aim in the present work has dealt with the possible relationship of the microorganisms in the soil. The microscopic visualization of wood colonization by the microorganisms, and the chemical analysis of the degraded wood compare...
M T De Troya, A Garcia, M J Pozuelo, A M Navarrete, A Cabanas
Collaborative soft rot tests: Interim report on PRL tests of Cu/Cr/As preservative using method of Document No: IRG/WP/208
1972 - IRG/WP 211
Preservative: Tanalith CT.106 - Results obtained with beech are given in the table and indicate a toxic limit of 16.7-19.2 kg/m³ - The initial soil moisture content was adjusted to 27.8% (the water holding capacity). Noticeable drying out has occurred in some of the test bottles....
J G Savory
Monographic card on Antrodia serialis
1984 - IRG/WP 1145
G Seehan
Resistance to soft rot of hardwood plywood treated with CCA salt
1983 - IRG/WP 3258
Plywood made from indigenous hardwoods was treated at an average loading of 34 kg Celcure A per m³ and was installed in a field test. After 20 years the samples were only slightly attacked by soft rot and the glue bonds were still intact....
R S Johnstone
Laboratory culturing and decay testing with Physisporinus vitreus and Donkioporia expansa orginating from identical cooling tower environments show major differences
1996 - IRG/WP 96-10184
Both Basidiomycete fungi Physisporinus vitreus (Pers.:Fr.) P. Karst. and Donkioporia expansa (Desm.) Kotl. & Pouz. were isolated from identical cooling tower environments. Azobé heartwood (Lophira alata), a very durable tropical wood species was totally deteriorated in cooling towers in a similar way by both fungi. First attempts to culture Physisporinus vitreus in laboratory circumstances sh...
J Van Acker, M Stevens
The identification and preservative tolerance of species aggregates of Trichoderma isolated from freshly felled timber
1992 - IRG/WP 92-1553
The surface disfigurement of antisapstain treated timber by preservative-tolerant fungi remains a major problem in stored timber. Identification of a range of isolates of Trichoderma based on microscopic morphological characteristics was found to be imprecise due to the variable nature of this organism. In addition, studies to compare visual (morphological) characteristics of these isolates with t...
R J Wallace, R A Eaton, M A Carter, G R Williams
Possibility of use of wood species per class of biological risks. Attempt to determine criteria based on Pr EN 350-1/2/3
1992 - IRG/WP 92-2409
M Rayzal
Rational weight per weight (w/w) qualifying retention from a pole bank in Bangladesh
2000 - IRG/WP 00-40187
Weight per weight (w/w) vs weight per volume (w/v) retention study revealed that the w/w % retention is found to be appropriate and uniform for all timber species in respect of its real effectiveness. The pole species having density below 512 kg/m3 (32pcf.) showing w/v retention below 20kg/m3 (1.25pcf.) have equal w/w retention of 4%. The apparently reduced w/v retention of low density poles will ...
A K Lahiry
Changes in the degree of decay of lignocellulosic substrate used in a screening test of fungicidal wood preservatives
1977 - IRG/WP 287
This report contains results of investigations aimed at: a) determination of the effect of the kind of substrate and species of test fungus on quantitative changes in used samples prepared from spruce cardboard, and b) comparison of the threshold fungicidal values of come fungicides determined with accelerated method, with values obtained by block method. During performed investigations, the metho...
K Lutomski
Some observations on causes of failure of preservative treated natural round transmission poles in Nigeria
1977 - IRG/WP 291
Treated natural round transmission poles in Nigeria have been discovered to be attacked underground as early as two years after planting. Termites and rot fungi attack the inner tissues and leave a pattern characteristic for the species of the pole. Tectona grandis, Nauclea diderrichii and Wide Pore pine, the major species for transmission poles in Nigeria show these attacks. A form of termite shi...
M A Odeyinde
Patent on the use of tannic acid and ferric chloride against marine borers, etc
1982 - IRG/WP 495
R Mitchell, T D Sleeter
Rapport sur l'activité du CEN/TC 38
1983 - IRG/WP 2204
M Pottevin
Questionnaire pour la préparation de fiches monographiques pour les champignons lignivores
1972 - IRG/WP 103 F
C Jacquiot
Detection of defects in standing poles by X-ray techniques
1980 - IRG/WP 2132
The application of X-ray techniques to wood pole inspection procedures has been evaluated. Internal defects were accurately identified using X-ray inspection methods. These methods and their possible influence on the safety and economic aspects of wood pale utilization are discussed....
W D Gardner, R S Johnstone, W Pitt
Biological performance of gypsum products containing borates
2000 - IRG/WP 00-30237
At suitable retentions borates have biostatic properties enabling them to be used for biodeterioration control in wood. They provide protection against decay fungi, mould, and termites, which are known to also attack gypsum products. Currently, many gypsum products contain added borates, which are used to improve physical and processing characteristics. Work examining the effect of borates at cont...
J L Fogel, J D Lloyd