Your search resulted in 586 documents. Displaying 25 entries per page.
Japanese standardized method for evaluating effectiveness of anti-sapstain and anti-mould chemicals
1988 - IRG/WP 2299
Japan Wood Preserving Association established a method for testing effectiveness of chemicals against sapstain and mold fungi on wood in 1979. The method is concerned with a laboratory technique using small timber specimens (20 x 50 x 3 mm³), petri dish and 5 test fungi. Effectiveness of each candidate chemical is evaluated on the basis of the relative resistance to sapstain and mold fungi which ...
K Tsunoda, K Nishimoto
Accelerated anti-termite laboratory tests, simulation of field conditions and assessment of results for service life
1994 - IRG/WP 94-20034
Termites are one of the most serious biodegrading agents in the tropics. Though some species of termites occur in the warmer temperate regions, only a few species can withstand the rigours of colder regions. Testing of termite resistance of material is done either by field tests or by accelerated laboratory tests. Field tests, though realistic to assess service life, are elaborate, take a long tim...
P K Sen-Sarma
Performance of preservative-treated timber commodities in above-ground service tests
1995 - IRG/WP 95-20064
Service tests established by NZ FRI are of commodities where treatment has been undertaken in commercial plants and although such data as preservative uptake of individual items is recorded and sample analysis undertaken, material is usually "run-of-mill" for the commodity being treated. The NZ FRI Service Test database includes a wide range of preservative/species combinations in virtually all ab...
M E Hedley, D R Page
International standardisation: a hypothetical case study with stand-alone borate wood preservatives
1998 - IRG/WP 98-20147
The possibility of developing wood preservation standards with a global remit has a number of obvious advantages as well as far reaching ramifications, many of which are undefined as yet. The commercial implications of adopting international standards are clearly considerable, but equally, such a development is likely to focus attention on the conceptual differences in the way that different regio...
M W Schoeman, J D Lloyd
The wood preservative performance of biocide mixtures containing chlorpyrifos
1994 - IRG/WP 94-30055
Chlorpyrifos (O,O-diethyl[3,5,6trichloro-2-pyridyl]phosphorothioate) was evaluated as a wood preservative insecticide in two long term field tests. In the first project, pine sapwood blocks treated with chlorpyrifos (CPF) were exposed to Coptotermes formosanus using an above-ground test format. CPF is effective in protecting wood from attack by this termite, but its activity appears to decrease wi...
P E Laks
Biological control of internal decay in Scots pine poles: A seven year experiment
1992 - IRG/WP 92-1529
The interactions between key fungi were monitored, by non-destructive and destructive sampling methods, during the course of an experiment on the effectiveness of Scytalidium sp. and Trichoderma spp. for eliminating established infections of Lentinus lepideus (Fr. ex Fr.) Fr. in creosoted Pinus sylvestris poles. Although extensively isolated at the beginning and end of the experiment, Trichoderma ...
P I Morris, D J Dickinson, B Calver
Comparison of laboratory tests and field experiments for the estimation of emissions from treated wood
2005 - IRG/WP 05-50224-6
The authorisation procedure for biocidal products according to the European Biocides Direc¬tive in¬cludes the assessment of possible environmental risks by the emission of ac¬tive ingre¬dients. This needs an input of data on the expected emissions of biocides into environmental com¬part¬ments. The procedures for the estimation of these emissions should be harmonised. La¬boratory test proceÂ...
U Schoknecht
Deltamethrin effectiveness against subterranean termite attack on wood under natural conditions
1989 - IRG/WP 1407
On fighting subterranean termites on wood, out of ground contact, the synthetic pyrethroid Deltamethrin shows positive aspects such as its efficiency and low mammalian toxicity. To evaluate its performance in conditions very similar to those in service use, specimens of Pinus sp were treated with solutions of Deltamethrin diluted in "white spirits" at 0.005% (w/w) and 0.01% (w/w) and exposed in a ...
P A Zanotto
A comparison of fungal strains used in the bioassay of wood preservatives
1984 - IRG/WP 2220
Previously published data are presented relating to a number of strains of wood-destroying basidiomycetes (Coniophora puteana, Coriolus versicolor, Gloeophyllum abietinum, Gloeophyllum sepiarium, Gloeophyllum trabeum, Lentinus lepideus, Poria placenta, Fibroporia vaillantii and Serpula lacrymans) commonly used as test fungi in the bioassay of wood preservatives. The data, which has not been statis...
J Wazny, H Greaves
Evaluation of the effectiveness of Tuff Brite C in the control of sapstain in laboratory and field tests
1992 - IRG/WP 92-3718
Since 1990, the anti-sapstain product Tuff Brite C (ASC 66898) has been evaluated internationally in laboratory and field tests, and has been commercially introduced in New Zealand. The product is an aqueous flowable formulation of chlorothalonil and carbendazim. Efficacy tests which have been carried out in New Zealand, Australia, USA, South Africa and Europe are described and summarized. Tuff Br...
T L Woods, C J Klaver
Performance of proprietary formulations of anti-sapstain preservatives on Hevea brasiliensis timbers in laboratory tests
1989 - IRG/WP 3532
A total of 10 proprietary and two experimental formulations were assessed for their effectiveness against sap-stain caused by Botryodiplodia theobromae on Rubberwood (Hevea brasiliensis). Sterilized wood samples 5x20x40 mm³ were dipped in the test chemicals for 60 seconds and then inoculated with 0.5 ml of culture filtrate of Botryodiplodia theobromae for incubation in sterile, damp petri dishes....
L T Hong
Objectives of future collaborative soft rot tests
1972 - IRG/WP 209
Progress has been made towards acceptance of a defined laboratory test method for determining the toxicity of preservatives against soft rot fungi (Documents IRG/WP/201 and IRG/WP/208) and, at the 1971 meeting in Brussels, the framework of collaboration for the next phase of testing was discussed. Time available at Brussels did not permit restatement of objectives, consideration of the stages by w...
J G Savory
Preliminary agar screening studies as the first stage in the development of a biological control system against basidiomycetes in ground contact situations
1995 - IRG/WP 95-10111
Preliminary screening of Trichoderma isolates as possible biocontrol agents for protection of wood in ground contact situations against basidiomycete decay was undertaken on three types of media. Media used were 3% malt extract agar (MEA); a low nutrient synthetic media with a carbon: nitrogen ratio typical of that found in softwoods (LNM); and a similar synthetic media where the amino acid profil...
E J B Tucker, A Bruce
Exposure of preservative treated wood to terrestrial microcosms, pure cultures of fungi and in the field
1997 - IRG/WP 97-20114
Small stakes (5x10x100 mm3) of treated and untreated Pinus sylvestris sapwood were exposed in terrestrial microcosms with different soils, two taken from test fields in Sweden, one soil from a conifer forest and one garden compost soil. Stakes of the same size were also exposed to pure cultures of the brown and white rot fungi, Postia placenta and Phanerochaete chrysosporium. After exposure, weigh...
M-L Edlund
Benzalkonium chloride (an AAC preservative): Criteria for approval, performance in service, and implications for the future
1985 - IRG/WP 3328
The data base generated for benzalkonium chloride was considered adequate for commercial approvals, particularly after revision in late 1982. Field trials, although not part of the approval criteria, generally supported commercial use; decay observed in one test (post and rails) after 6 years' exposure would have resulted in some caution in setting retentions. No laboratory trial, nor fie...
J A Butcher
Influence of water-borne preservatives on water repellency and the impact of addition of water repellent additives
1992 - IRG/WP 92-3704
The primary goal of a desirable wood preservative system is to effectively control decay fungi and other biodeteriogens in service. The water repellent nature of a given system may play an important role in the protection of wood. In this study, the water repellency of several water-borne preservative systems has been evaluated by measurements of tangential swelling during immersion. The systems i...
L Jin, D M Roberts, A F Preston
Evaluation of a laboratory soft rot test on basis of weight loss and residual strength
1989 - IRG/WP 2336
Based on the principles of different previously reported experimental procedures dealing with laboratory soft rot testing, a study was conducted on treated poplar and beech. Preservatives used were CCA, CCF, AAC, Azaconazole and TCMTB. Treated samples were exposed for three months in a vermiculite substrate to Chaetomium globosum. Evaluation was based on absolute mass loss, percentage weight loss ...
W Verbeke, J Van Acker, M Stevens
Screening of fungal strains for wood extractive degradation
1998 - IRG/WP 98-10254
Fungal strains were screened for their ability to degrade apolar extractives in wood from scots pine. The degradation of total wood extractives by 91 different strains was monitored in stationary batch assays incubated for 6 weeks. The results obtained show that the ability of wood-inhabiting fungi to utilize wood extractives varied greatly, even for different isolates of the same species. Fungal ...
J Dorado, M J Martinez-Inigo, T A van Beek, F W Claassen, J B P A Wijnberg, R Sierra-Alvarez
Microbial ecology of treated lap-joints exposed at Hilo, Hawaii for 12 months
1996 - IRG/WP 96-20089
Lap-joints made from Southern yellow pine treated with ACQ, DDAC or Propiconazole were exposed and sampled over 12 months. TnBTO treated Lap-joints were later exposed as a standard treatment. The moisture content of the joint area remained at 23% to 28%, but, away from the joint, varied between 20% to over 30%. Untreated samples had higher moisture contents and there was little difference between ...
S Molnar, D J Dickinson, R J Murphy
Screening of the technical performance and aquatic toxicity of N-methylolacrylamide treated wood
2000 - IRG/WP 00-40166
In the course of the last decades chemical modification of wood species, with a limited natural durability, has been subjected to intensive research. As a possible alternative and supplementary treatment of non-durable wood in a range of applications it remains one of the major topics in the wood preservation world. Different modification systems have been scaled-up and are now in an industrialisi...
V Rijckaert, S De Geyter, J Van Acker, M Stevens
Preservation of coppice wood for the fabrication of glued beams or panels
1987 - IRG/WP 3427
In this survey we will examine the specific problems concerning the conservation and the preservation of timber (issued from trunks of small diameter corresponding to products of clearings or coppices) destined for the fabrication of solid reconstituted elements. Thus for six metropolitan species of wood, we first characterized the biological deteriorations which occur after felling and their kine...
G R Y Déon, R Schwartz
The movement of iron into field test stakes
1987 - IRG/WP 2284
Failed and sacrificial stakes recovered from the Westham Island field test site were examined for their iron content. Varying amounts were recorded, which were greatest in the failed stakes. The possible role of the iron taken up by the below ground portion of the stakes, in accelerating the decay process and/or the preservative leaching is under investigation. The reaction of the iron with the ch...
J N R Ruddick, P I Morris
Compatibility of deltamethrin with wood-finishing and construction materials
1993 - IRG/WP 93-30010
Under normal use conditions, treated wood comes to close contact with the structural components of a buiLding, and/or receives finishing, forming a new interface, which can affect the performance of a new product such as deltamethrin. To study this possibility, block-tests of Parana-Pine (Araucaria angustifolia), measuring 12 x 24 x 0.5 cm³ (with the largest dimension parallel to the wood-grain),...
E S Lepage
Field evaluation of several bait toxicants for subterranean termite control: A preliminary report
1988 - IRG/WP 1376
Since 1983, field studies have been conducted to evaluate the effectiveness of several bait toxicants in reducing subterranean termite populations at the Chipola Experimental Forest in Florida. Tests with fenoxycarb (Ro 13-5223), Ro 16-1295, and Avermectin B1 indicated that fenoxycarb showed the most promise. Large numbers of presoldiers and intercastes have continued to occur in plots treated wit...
S C Jones
Copper based wood preservative - A new approach using fixation with resin acids of rosin
2000 - IRG/WP 00-30249
Copper soaps with carboxylic acid groups of resin acids of rosin were shown to be potential long-term wood preservatives. The principle involved is the attachment of copper to the network formed by the inorganic part of the preservative (rosin) through the -COOH groups. The mechanisms of fixation have been studied, and it has been shown that this association could be obtained : (1) by forming the ...
C Roussel, J P Haluk, A Pizzi, M-F Thévenon