Your search resulted in 856 documents. Displaying 25 entries per page.
Six-year Report on the Performance of Borate-treated Lumber in an Above-ground Termite Field Test in Hawaii
2004 - IRG/WP 04-30343
We report the fifth and sixth years of field study results from a protected above-ground field test in Hawaii simulating the sill plate (dodai) used in conventional Japanese housing construction. Field tests were established in both Hawaii and Japan to examine the efficacy of disodium octaborate tetrahydrate (DOT, 2% and 3% BAE shell and through) wood treatments. In Hawaii, chromated copper arsen...
J K Grace, A Byrne, P I Morris, K Tsunoda
IRG/COIPM INTERNATIONAL MARINE TEST - to determine the effect of timber substrate on the effectiveness of water-borne salt preservatives in sea-water. Progress Report 5: Interim report
1980 - IRG/WP 454
Wood samples (15 x 2 x 2 cm³) were treated with one copper/chrome/arsenic (CCA) and one copper/chrome/boron (CCB) preservative using the following concentrations - O, 3, 6, 10%. Treated samples of three reference wood species - Alstonia scholaris, Fagus sylvatica, Pinus sylvestris were supplied to all participants. Additional local species were chosen by participants and included in the test at t...
R A Eaton
Simulation test of subchronic inhalation toxicity of TBTO vapours in the air
1987 - IRG/WP 3454
The test was carried out in a wainscotted room of a normal size. Wooden panelling had been treated with one coat of basic preserving agent and, after the installation, with 2 coats of stain. Laboratory animals (rats) were kept in this room for 90 days. For the same period a control group of test animals was kept in a room of equal size where there was no panelling. During the test, concentration o...
V Skubic, S Kobal, J Stupar, R Ajlec, J Korošin, G R Pecenko
Marine wood-borer test with preservatives on the coasts of Turkey
1995 - IRG/WP 95-10091
Marine wood-borer tests were carried out on the coasts of Turkey (Marmara, Mediterranean Sea and Black Sea). Sapwood blocks of 8 x 15 x 30 cm³ in size from Scots pine, Bornmüller's fir oriental beech and sessile oak were used. The test blocks were treated with CCB-salts by full cell process and coal tar creosote by empty cell process. The test blocks were installed on exposure sites bef...
A Bobat
Bibliographie sur les produits organiques en solvant pour la préservation du bois
1972 - IRG/WP 313
Le présent travail exécuté dans le cadre do la Section III du Groupe International de la Préservation du bois a pour but de rassembler, en vue d'éventuelles études plus approfondies sur le sujet ou sur l'un de ses aspects, les principales et relativement récentes références sur les produits de protection des bois en solvant, souvent appelés, et parfois improprement, pro...
H Alliot
Leaching of Boron - more than 3 years of field exposure
1997 - IRG/WP 97-30143
The diffusibility of Boron in wood and thus the ability of its leaching is known since long. Nevertheless quantitative data on this process are only rarely available. To overcome this lack of information field exposure tests were started with beam-segments treated with pure boric acid and poles treated with CCB. In addition some of the beam-segments were surface-treated with a varnish to investiga...
A Peylo, H Willeitner
Assessing the bioresistance conferred to solid wood by chemical modification
1997 - IRG/WP 97-40099
The chemical modification of wood using straight chain alkyl anhydrides can considerably enhance its durability. This paper presents an assessment of the effectiveness of these modifiers in improving the biological resistance of a susceptible softwood when exposed to four different basidiomycete fungi, soft rots and the larvae of the house longhorn beetle (Hylotrupes bajulus). It was clear that so...
E D Suttie, C A S Hill, D Jones, R J Orsler
Termite field evaluations in hawaii: A brief review of methods and issues
1995 - IRG/WP 95-10131
The severe termite hazard in Hawaii, principally due to the presence of the Formosan subterranean termite (Coptotermes formosanus Shiraki), has long required the use of preservative-treated lumber in building construction. This hazard has also favored and stimulated field research in Hawaii on methods of protection from termite attack, including evaluation of soil insecticides and treated wood und...
J K Grace
Penetration as Key Factor for Determining the Performance of Wood Preservatives
2004 - IRG/WP 04-20293
Stakes of Scots pine sapwood with a dimension of 4 x 4 x 75 cm³ were impregnated with preservatives containing 2 % of propiconazole which had passed the EN 113 test criteria without any problems. The
penetration of the colourless preservative was determined successfully by a fungal screening test described by Sutter (1978). The test revealed the insufficient penetration behaviour within the gi...
H Leithoff, I Stephan, R-D Peek
Variations in the virulence of test strains of Coniophora puteana (Schum ex Fr) Karst
1982 - IRG/WP 2185
In laboratory experiments using petri-dishes and small wood blocks (30 x 10 x 5 mm³) 6 different isolates of Coniophora puteana strain BAM 15 were compared with strain FPRL 11E for growth rate and decay capability. Only the recently received strain from EMPA was suitably active giving 24% weight loss after 6 weeks compared with 38.1% for 11E. Collation of data from standard test records revealed ...
A F Bravery, J K Carey, W Worley
Effectiveness of wood preservatives by IUFRO's method
1984 - IRG/WP 3305
Pinus elliottii and Eucalyptus saligna stakes treated with 4.9; 6.9; 9.6 and 13.5 kg/m³ of CCA-A, CCA-C and CCB and with 30-50; 60-80; 90-110 and 120-140 kg/m³ of Benzotar and CNSL (cashew-nut shell liquid) were exposed in seven test sites in Sao Paulo State, Brazil. After 4 years it was concluded that the mean useful life of untreated Pinus elliottii stakes was 8 months and of untreated Eucalyp...
G A C Lopez, E S Lepage, O B Neto
Standard principles of testing termiticides: A discussion paper
1991 - IRG/WP 1502
Recent restrictions and banning of termiticides such as organochlorines in some countries has focussed attention on the need for new and novel compounds as termiticides. However, this poses problems for both wood preservative manufacturers and termitologists. Test procedures have to be devised to evaluate the new termiticides so that the tests are practical, encourage vigorous termite activity, an...
J R J French
Application of DNA fingerprinting methods to identify biocontrol strains of fungi imperfecti
1994 - IRG/WP 94-10068
We have analyzed a number of biocontrol strains of Trichoderma harzianum and other Trichoderma strains with the methods DNA fingerprinting and PCR fingerprinting to differentiate and identify these strain which is not possible with morphological or biochemical methods. We could differentiate even gamma-ray induced mutants from each other as well as different strains form the same and different spe...
A Schlick, K Kuhls, W Meyer, E Lieckfeld, T Börner, K Messner
Use of compression strength loss for measuring decay in the soil block test
1996 - IRG/WP 96-20083
The possibility of using radial direction compression strength of wood, rather than mass loss, was evaluated for both a brown-rot fungus (Gloeophyllum trabeum) and white-rot fungus (Trametes versicolor). With untreated pine wafers (5 x 19 x 19 mm³ - l x r x t) exposed to Gloeophyllum trabeum in a soil block test for five days, the compression strength loss was nearly 50% compared to a 5% mass los...
D D Nicholas, Zhongwei Jin
Special seminar on screening techniques for potential wood preservative chemicals
1978 - IRG/WP 2113
This paper continues following issues:
I. SCREENING INSECTICIDES
1) R W Berry (BRE/PRL, UK): Screen testing of insecticides for use in remedial wood preservatives.
2) D J Cross (FRI, New Zealand): Rapid screening of contact insecticides for use on forest products.
3) C R Coggins; A Forsyth; A E Glaser (Rentokil, UK): Experience in the use of indicative screening techniques for termiticides.
...
Anonymous
IRG/COIPM INTERNATIONAL MARINE TEST - to determine the effect of timber substrate on the effectiveness of water-borne salt preservatives in sea-water. Progress Report 19: Report on the condition of specimens at Sekondi, Ghana after 42 months
1984 - IRG/WP 4109
The results of the first formal inspeation of CCA- and CCB- treated test panels exposed at Sekondi, Ghana, in June 1980, are presented. All untreated control panels of both reference and local species have been destroyed. Of the% CCA- treated specimens, only those of Pinus sylvestris (reference species) and Mitragyna stipulosa (local species) have not been attacked. 3% CCB-treated local species ha...
F F K Ampong
Application of non-destructive techniques (durometric and ultrasonic) to evaluate the degradation of woods in service by Gloeophyllum trabeum
2001 - IRG/WP 01-20220
In order to establish the degree of degradation of wood used in construction, it is necessary to employ non-destructive methods (ultrasonic, durometric, densitometric). In this study, ultrasonic and Pilodyn durometric techniques have been applied to try to establish parameters of relationship between the values obtained by both, for their immediate application to wood in service. As a method of re...
M T De Troya, L Palaia, A Navarrete, V Galvañ, R Molina, A Guijarro, J Camacho
Characterization of Poria indoor brown-rot fungi
1995 - IRG/WP 95-10094
The heterogeneous group of "Poria" fungi causing brown rot in buildings and also of wood in ground contact comprises Antrodia vaillantii, Antrodia serialis, Antrodia sinuosa, Antrodia xantha and Tyromyces placenta. These fungi have similar morphological appearance and biology. Their nomenclature has a confusing history and is still not uniform. As a consequence, misinterpretations may occur. SDS p...
O Schmidt
New experiences with Dry Rot in Danish buildings, heat treatment and viability tests
1989 - IRG/WP 1423
An increasing number of concealed dry rot attacks, especially in older multi-storey houses under renovation, have been detected during the last few years. A necessary consequence is a demand for cheaper methods of repair, compared to the standard method used in Denmark for many years otherwise severely attacked houses will by pulled down. A heat-treatment has been developed and tested in practice....
A P Koch, C Kjerulf-Jensen, B Madsen
Termite resistance classification of some tropical and temperate species based on the laboratory choice test results against formosan termite, Coptotermes formosanu
2004 - IRG/WP 04-20291
The results of classification of termite durability were varied. We carried out
laboratory evaluation of the classification of termite durability on various species by
the choice test against formosan termite, Coptotermes formosanus. We classified five
grades (very sensitive to very resistant). According to our results, azobe, ipe, keruing,
intsia, kapur, yellow meranti, jarraah, malas, cypres...
K Suzuki
Resistance of borate-treated lumber to subterranean termites under protected, above-ground conditions
2000 - IRG/WP 00-30239
An experiment to simulate the dodai (sill plate) of the Japanese houses was conducted at the termite field test site of Wood Research Institute in Kagoshima, Japan where two economically important subterranean termite species [Coptotermes formosanus Shiraki and Reticulitermes speratus (Kolbe)] are established. DOT(disodium octaborate tetrahydrate)-treated hem-fir samples [Tsuga heterophylla (Raf.)...
K Tsunoda, A Adachi, T Yoshimura, A Byrne, P I Morris, J K Grace
The accelerated L-joint test method for determination of the out of ground natural durability
1998 - IRG/WP 98-20146
The accelerated L-joint test incorporates a moistening device and uses a close end water trap in an open joint connection with a laminated tenon member consisting of the perishable reference wood species scots pine sapwood and beech.
After one year of exposure it is possible to show a distinct identification of natural durability classes 4 and 5 against the more durable wood species. Both weight ...
J Van Acker, C Brauwers, M Stevens
Aureobasidium or Hormonema? A Genetic Approach.
2004 - IRG/WP 04-10529
Aureobasidium pullulans is the main organism causing disfigurement of coatings on wood and the surface of exposed timber. This disfigurement of timber in-service is referred to as “bluestain in-service”. A. pullulans is also associated with the sapstaining of dead wood in the forest and in-service. A. pullulans is noted for its highly variable growth forms (polymorphisms). This variability pre...
M J Ray, D J Dickinson, M Buck
Methods for improving preservative penetration into wood: a review
2002 - IRG/WP 02-40227
Pressure treatment technologies have been available since the mid-1830's, but the processes used for wood treatment are still largely unable to overcome the fundamental limitations of flow through semi-permeable pit membranes. Instead, methods have arisen that attempt to improve treatability of the wood including incising, compression rolling, through boring, or radial drilling. Other a...
J J Morrell, P I Morris
The ecotoxicology assessment of wood preservatives and their active ingredients by means of germination tests using cress - A critical consideration
1999 - IRG/WP 99-50125
With putting the Biocidal Products Directive 98/08/EC (BPD) in place an environmental risk assessment for wood preservatives and impregnated timber is requested. To assess possible risks, suitable test methods are required, which reveal the ecotoxicological profile including environmental fate and behaviour of treated commodities. Germination and growth tests could contribute to the determination ...
P Jüngel, A O Rapp, E Melcher