Your search resulted in 690 documents. Displaying 25 entries per page.
Preliminary evaluations of a small wafer assay for screening potential biological control agents
1989 - IRG/WP 2332
Screening potential biological agents for controlling wood decay fungi poses a dilemma. The ideal test would eliminate as many variables as possible. Most tests utilize pure cultures of the test organism on an artificial media which in no way resembles wood. The use of sawdust improves this approach, but the sawdust increases fungal access to the lignocellulose matrix, potentially inflating the im...
C M Freitag, J J Morrell
The evaluation of the effectiveness of wood preservatives by means of IUFRO's method for field tests with wooden stakes
1985 - IRG/WP 3348
Pinus elliottii and Eucalyptus saligna stakes treated with CCA-A, CCA-C, CCB, Cashew Nut Shell Oil and Benzotar solutions were exposed in seven test sites in Sao Paulo State, Brazil. After five years of exposure, between oil-borne preservatives Benzotar show better performance than CNSL (cashew nut shell liquid), and within waterborne preservatives the performance of CCB is not so good as that of ...
G A C Lopez, A M F Oliveira, E S Lepage
Current status of AAC preservatives in New Zealand
1980 - IRG/WP 3141
Two types of alkylammonium compounds (AAC) have been approved as commercially acceptable wood preservatives by the NZ Timber Preservation Authority (TPA). They are alkyldimethylbenzyl ammonium chloride and alkyldimethylamine acetate, both of which must contain either (a) 70% alkyl chains of C12 + C14 and less than 10% of any other individual chain length, or (b) 85% alkyl chains of C12 + C14 with ...
J A Butcher
Co-operative research project on L-joint testing. Progress report to March 1986
1986 - IRG/WP 2272
Further sets of data received from CTFT (France) after 18 months exposure, BAM (Germany) after 18 months exposure, STU (Sweden) after 9.5 months exposure and TI (Denmark) after 12 and 17.5 months exposure are presented and discussed in conjunction with data previously reported. The new data are generally in agreement with those presented previously and indicate the major difference between the co-...
J K Carey, A F Bravery
Results on field stake tests against termite – Maximum for 8 years examination at Kumamoto in Japan
2003 - IRG/WP 03-10463
Various preservative treated or modified wood and charcoal painting stakes were tested in field, maximum for eight years in Kumamoto, distributed two main termite species, Coptotermes formosanus and Reticulitermes speratus. After two years in field, untreated sapwood of sugi (Cryptomeria japonica) were observed severe attacks by termites, but the preservative treated stakes were observed no signif...
K Suzuki
The Effect on Biological and Moisture Resistance of Epichlorohydrin Chemically Modified Wood
2002 - IRG/WP 02-40224
Southern pine solid wood and fiber were chemically modified with epichlorohydrin to help in understanding the role of moisture in the mechanism of biological effectiveness of chemically modified wood. The solid wood had weight gains from 11% to 34%, while the fiber had weight gains from 9% to 75%. After modification, part of the specimens were water leached
for 2 weeks or extracted for 2 hours ...
R E Ibach, B-G Lee
Window test. Direct testing of wood resistance to decay: A study of its fitness, its reliability and its accelerating factor
1984 - IRG/WP 2219
This is the results of an experiment using the window-test specimens, exposing the specimens to three different types of testing procedure: 1. Natural infestation in the open air; 2. Artificial infestation and exposure in the open air; 3. Artificial infestation in a green-house. The results show good similiraties of the three parallel tests in term of decay, and assess the reliability of the windo...
G R Y Déon, L N Trong
Nasutitermes exitiosus and wood-rotting fungi in Eucalyptus regnans, E. acmenioides, E. wandoo, and E. marginata: force-feeding, laboratory study
1985 - IRG/WP 1231
Under a force-feeding regime, the termitid Nasutitermes exitiosus was fed on four eucalypt timbers infested with several fungal species to investigate the influence of such fungus-infested timbers on mass of wood lost, termite biomass, fat content and water content. The results showed that wood mass losses were markedly affected by species of fungi and timber. The interaction of fungi and timbers ...
D B A Ruyooka
Development of a disinfection treatment for oak logs to be imported from the USA
1984 - IRG/WP 3283
The European veneer industry depends greatly on oak supplies from the USA. To prevent the accidental introduction of the American Oak Wilt Disease (Ceratocystis fagacearum) into the member states of the EC, a disinfection treatment was developed for oak logs under consideration of the technical requirements of veneer production. Laboratory experiments and field trials in Germany and in the USA sho...
W Liese, M M Ruetze
A field test with anti-stain chemicals on sawn pine timber in Brazil
1989 - IRG/WP 3513
Field tests were carried out in São Paulo State - Brazil, to evaluate pre-treatment formulations of O-Phenyl-Phenol (OPP) based products. The Sodium Pentachlorophenate solution was used as a reference formulation. The treated test blocks were stacked in a covered shed, and in an uncovered place for air drying. The evaluation was done by measuring the percentage of stained surface on each test blo...
M B B Monteiro, S Brazolin
Properties of cellulose degraded by the brown rot fungus, Postia placenta
1988 - IRG/WP 1350
To gain further understanding of the nature of the cellulose depolymerizing agent or agents of brown-rot fungi, brown-rotted cellulose was chemically and physically characterized. Various culture conditions, such as low nitrogen and elevated oxygen levels, did not induce degradation of cellulose by Postia placenta in liquid cultures. Therefore, brown-rotted cellulose for analysis was prepared by a...
T L Highley, R E Ibach, T K Kirk
Wood decay of Pinus sylvestris L. and Fagus sylvatica L. by marine fungi. Part 2
1991 - IRG/WP 1471
The water-logged wood conservation requires a good knowledge of the wood decay organims which produce the degradation. Previous conducted studies (ESCORIAL, TROYA, GARCIA DE LOS RIOS, 1990) have shown that the incubation times normally used for in vitro laboratory tests are not sufficients for a significant wood degradation. This has been the reason why the aim of this work was the study of such d...
M T De Troya, A M Navarrete, M C Escorial
Organic nitrogen in wood: Growth substrates for a sapstain fungus
1993 - IRG/WP 93-10019
The nitrogen content of mature wood from lodgepole pine was 0.046% as determined by micro-Kjeldahl. Low molecular weight proteins between 14 and 21 kDa were identified in mature wood, branch wood and sap pressed from wood chips. Amino acids were quantified in acid-hydrolyzed wood samples and accounted for between 19 and 35% of the nitrogen in wood. The sapstaining ascomycete Ophiostoma piceae stra...
L D Abraham, C Breuil
Accelerated termicidal performance data for new water-based copper linoleate formulations
1996 - IRG/WP 96-30104
An organic solvent based copper linoleate (Culin) has proved itself as an effective wood preservative in long term field trials in South Africa over a period of 30 years. Whilst the organic solvent based product offers good wood preservative performance, primary industrial interest has been in an emulsified version of the product. The objective of this study was to evaluate the influence of two di...
D Conradie, P Turner
Artificial weathering as an aid to assessing the effectiveness of chemicals for preventing blue stain in service - a co-operative study
1984 - IRG/WP 2215
The paper reports co-operative studies carried out within Working Group II of the International Research Group on Wood Preservation to assess the effects of different artificial weathering systems on the performance of fungicides to control blue-stain in service. It has been shown that Atlas, Xenotest and Marr equipments operated according to particular standard schedules can give essentially the ...
A F Bravery, D J Dickinson
Fruitbody formation and basidiosporogenesis by the white rot fungus Pycnoporus cinnabarinus
1988 - IRG/WP 1348
Conditions for fruitbody formation by the white rot fungus Pycnoporus cinnabarinus in vitro were outlined. A marked difference in substrate requirements in comparison to previously tested brown rot fungi was revealed. Agar media containing Walseth cellulose and NH4 tartrate at 1 g/l permit profound production of basidiospores particularly at 15°C but only under light treatment. Higher NH4 tartrat...
J Bjurman
Collaborative soft rot tests: Tests conducted at Princes Risborough and Delft on soil samples from collaborating laboratories
1972 - IRG/WP 210
The laboratories which took part in the original collaborative soft rot test (Savory and Bravery, Holz u Org 5 (1) 58-90, 1970) sent samples of the soil used in the original test to Princes Risborough. Portions of this material were sent to Dr Hof for soil analyses at TNO and the remainder was employed at Princes Risborough for the conduct of comparative tests of soil virulence when used as a comb...
J G Savory
Leaching from CCA-treated wood submerged in seawater: Effect of high loadings, and a comparison between laboratory and marine conditions
1996 - IRG/WP 96-50080
This study of leaching examined the following variables: CCA loading; marine versus laboratory exposure and length of submergence. Blocks of Pinus sylvestris were treated to a range of nominal retentions from 15 to 50 kg/m³. Each block was then divided into three cubes and all transverse faces were sealed. All cubes were allowed to fix at ambient temperature for a minimum of one week. One set of ...
R M Albuquerque, S M Cragg, J D Icely
Growth of the copper tolerant brown rot fungus Antrodia vaillantii on different substrates
1995 - IRG/WP 95-10121
In recent years the copper tolerant brown rot fungus Antrodia vaillantii caused severe damages on impregnated wood in ground contact. The pattern of decay gave the impression that impregnated wood was even more severely attacked than unimpregnated. To investigate this question more closely laboratory tests were carried out. In a "choice test" Antrodia vaillantii grew preferably towards CC-impregna...
H Leithoff, I Stephan, M-T Lenz, R-D Peek
Which substrate to use in a laboratory test with soft rot micro-fungi: vermiculite or unsterile soil?
1991 - IRG/WP 2372
A draft European Standard is being proposed by CEN TC 38 in which a vermiculite-burial and a soil-burial test to be carried out in succession are required. Various experiments with both procedures were set up with CCA, CC and propiconazole-formulations. The results show that vermiculite and unsterile soil yield comparable threshold values against soft rot. This poses the question of whether a two-...
A R Valcke
Collaborative soft rot tests: Statistical treatment of results of soil analyses
1971 - IRG/WP 29
Institutes taking part in the collaborative experiments already reported forwarded samples of the soils employed in the tests to the Forest Products Research Laboratory, England. The soils were then autoclaved sterilised under uniform conditions and sent to the Department of Forest Soils, the Royal College of Forestry, Stockholm, Sweden. The results of the soil analyses are given in Table 1, toget...
A F Bravery
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
The efficacy of polymer/preservative treatments in soil-bed exposure
1992 - IRG/WP 92-3729
Southern pine was treated with CCA, CCB, sodium borax/boric acid, or disodiumoctaborate, alone or in combination with an acrylic polymer system containing a water repellent. Treated samples were subjected to an unsterile soil burial test. The addition of polymer reduced the weight loss in borontreated samples at the lower retentions but not at the higher retention. Results with borates indicate th...
R J Murphy, H M Barnes, S M Gray
Practical experiments with Boracol 10 Rh used as a fungicide in the repair process after attack by the dry rot fungus (Serpula lacrymans)
1987 - IRG/WP 3458
The test is carried out in an old house in Nyhavn, Copenhagen. The roof and the walls close to were heavily attacked by dry rot fungus (Serpula lacrymans) because damage to the zinc covering the frontspice were letting in water to the wood and wall construction. An attack by the dry rot fungus is more complicated to repair compared with other wood destroying fungi because beside the damage on wood...
J Bech-Andersen
Decay resistance of Siberian larch wood against brown rot fungus. - Part 3. The variation between plus trees and their grafted clones
2000 - IRG/WP 00-10350
The aim of the study was to estimate the variation in the decay resistance of Siberian larch (Larix sibirica Ledeb.) wood using mature plus trees and their grafted clones. Samples were collected with an increment core borer from 11 original plus trees and their 25-year-old grafted seed orchard clones. A typical brown rot fungus, Coniophora puteana (Schum. ex Fr.) Karst. (BAM Ebw. 15), was used as ...
H Viitanen, L Paajanen, M Venäläinen, A Harju, P Velling