Your search resulted in 942 documents. Displaying 25 entries per page.
Efficacy of deltamethrin associated with TCMTB and MBT for the temporary protection of timbers immediately following their sawing, in tropical countries
1987 - IRG/WP 1321
K-Othrine bois 2.5 "sciage"Ò containing 2.5 g/l of deltamethrin, 50 g/l of TCMTB and 50 g/l of MBT used at a 6% dilution controls effectively during the drying process of the freshly sawn wood, the insects attacking wet wood, the staining fungi and the rots. The protection lasts 4 months. The efficacy trials carried in 1985 and 1986 in the CTFT ("Centre Technique Forestier Tropical") of Abidjan, ...
J S Duguet, V Dartigues
Proposals for further co-operative studies on determining toxic values against wood-destroying basidiomycetes (1988)
1988 - IRG/WP 2316
This document sets out proposals for a further series of co-operative tests, based on previous discussions. A basic soil/block test is proposed, to be carried out by all participants using one preservative and four test fungi. Optional additional tests may be carried out using a range of other media (agar, vermiculite, rockwool) additional fungi of choice, additional preservatives of choice and pr...
A F Bravery, J K Carey
Test of N-tritylmorpholine in combination with synthetic pyrethroids against marine borers in tropical Australia and Panama
1991 - IRG/WP 4168
Test blocks ol Pinus sylvestris sapwood were pressure impregnated with white spirit solutions of N-tritylmorpholine, either alone or in combination with permethrin, deltamethrin or cypermethrin. They were exposed in the intertidal zone at Mourilyan Harbour, North Queensland, Australia and subtidally at either end of the Panama Canal. After 5 months' exposure at Naos Island at the Pacific ...
S M Cragg, J D Bultman
Field test results for the elimination of subterranean termite (Coptotermes formosanus) colonies by a bait system containing the IGR hexaflumuron
1997 - IRG/WP 97-10222
Field studies were conducted at Chichijima (Ogasawara Islands, Tokyo) to determine the effectiveness of a termite bait system (commercial name: Sentricon* system) containing hexaflumuron (Insect Growth Regulator: IGR) in the elimination of subterranean termite (Coptotermes formosanus) colonies. The level of subterranean termite activity on Ogasawara Islands is high resulting in extensive damage to...
K Suzuki, Y Morita, K Yamauchi
Accelerated decay tests to investigate postulated effects of tannins on CCA efficacy in wood
1988 - IRG/WP 3497
Five groups of blocks (10 x 10 x 5 mm³) viz., Pinus patula, Pinus patula impregnated to 4% (w/w) tannin; Eucalyptus grandis, Eucalyptus grandis with natural tannins extracted; and extracted Eucalyptus grandis with tannins returned as above; were prepared. Blocks from each group were then treated to 0, 5, 10 and 15 kg/m³ CCA and challenged in four 15-week decay tests, viz., soil burial, and expos...
U L Scherer, A A W Baecker
Effect of angle of exposure on degradation of radiata pine during weathering trials
1988 - IRG/WP 2301
The importance of angle of exposure on the degree of weathering of materials has not been adequately resolved. In conventional tests, specimens are exposed at an angle of 45° facing the equator, but more recently experiments on polymeric materials have suggested that an angle of 0° may be preferable since this angle maximises levels of received ultra-violet radiation. In this paper the degradati...
P D Evans
Fungicidal efficacy of some dimethyldithiocarbamates, dymethylaminopropionitrile and some salts of S-substituted thioglycolic acid
1998 - IRG/WP 98-30180
Screening for fungicidal activity against Trametes versicolor and Coniophora puteana of the following compounds was performed: sodium N,N-dimethyldithiocarbamate, dimethylalkylammonium (C12-C14) N,N-dimethyldithiocarbamate, benzyldimethylalkylammonium (C12-C14) N,N-dimethyldithiocarbamate, N,N-dimethylaminopropionitrile and ammonium, copper and zinc salts of N,N-dimethyldithiocarbamoylacetic acid....
M Petric, F Pohleven, M Humar, U Kolman
Laboratory evaluation of metallic naphthenates as wood preservatives
1991 - IRG/WP 3654
Fungicidal and termiticidal efficacy of copper and zinc naphthenates was appraised according to Japanese standardized laboratory testing methods. Copper and zinc naphthenates succeeded in protecting wood from decay fungi at retentions of 0.5 and 1.0 kg/m³ as metal, respectively. [JIS A 9302 (1976)] when they were applied to vacuum/soak impregnation [JIS A 9301 (1976)]. With respect to the fungici...
K Tsunoda, M Sakurai
Glulaminated poles - Progress report after 7 years' testing
1987 - IRG/WP 3444
In 1979 a number of glulaminated poles with various preservative treatments were placed in a greenhouse at Uppsala, at the Simlångsdalen test field in southern Sweden and under a power line just south of the Arctic circle in order to study their resistance against biological degradation. The tests have shown that the comparatively best performance will be obtained if each lamination is treated wi...
J Jermer, Ö Bergman
A serial exposure technique for estimating probable service life of treated timber
1978 - IRG/WP 2111
This paper briefly describes part of our preliminary work aimed at developing a test procedure that culd be adopted as a standard method. A detailed version of the work has been submitted for formal publication. In both papers, the aim is to promote interest in extended laboratory testing of wood preservatives. It is believed that this work may provide the basis of a laboratory test procedure from...
J A Butcher
Soft rot - Soil burial - Tests. Influence of the water content of the soil on wood decay
1972 - IRG/WP 212
The decay of wood samples buried in the soil is influenced by various factors. Decisive are the water content, the content of organic substances, pH-value content of mineral nutritive substances etc. of the soil. For the tests, carried out by the EMPA until now, it was always started with a water content of 35%, refered to the dry weight of the EMPA-soil = 75% of its water capacity. In order to in...
O Wälchli
Preliminary results of the treatment of wood with chlorosilanes
1981 - IRG/WP 3172
It is clear from the initial data reported here that the treatment of pine sapwood with chlorosilanes under the reaction conditions employed did not significantly reduce the decay by both white rot and brown rot fungi. Only the dichlorosilane compounds showed to possess some protective action against fungal attack. Before drawing conclusions on the application of organosilicon compounds as potenti...
M Stevens
Laboratory tests on artificial weathering of Quercus rubra crossties
1986 - IRG/WP 2252
Clear red oak (Quercus rubra) blocks were used to evaluate various types of accelerated aging tests including boil, steaming, and cyclic weathering. It was found that the repeated vacuum and pressure treatment of wood in water, steaming, oven-dry, and freezing appeared to be most effective in reducing the MOE in compression and hardness modules of wood specimens. Red oak crossties which were press...
P Chow, A J Reinschmidt, E J Barenberg, S L Lewis
The effect of water-repellent additives on the leaching of CCA from simulated southern Yellow pine decks
2000 - IRG/WP 00-50158
End-matched SYP boards were pressure-treated with CCA or CCA in combination with commercial water repellent additives. After fixation and drying, the boards were placed in plastic boxes and exposed outside in Harrisburg, NC. Plastic supports were used to keep the boards above the water collected. Over a period of five months, rain run-off water from 14 natural rainfalls were collected and analyzed...
F Cui, P J Walcheski
Soluble nutrient content in wood and its susceptibility to fungal discoloration and decay in above ground and ground tests
2000 - IRG/WP 00-10336
The objective of this comprehensive study was to reveal the impact of soluble nutrients in wood on its susceptibility to fungal discoloration and decay in various tests, which is important for the test methodology and standardisation. Seven tests were carried out including pure culture above and ground contact tests, above ground field test and laboratory ground contact tests. The samples containi...
O M Caballero, N Terziev
Chemical evaluation of borate treated pine sapwood attacked by the subterranean termite Coptotermes acinaciformis
1993 - IRG/WP 93-20003
Sapwood of hoop (Araucaria cunninghamii Ait. ex D. Don) and slash (Pinus elliottii Englem.) pines were treated by Vacuum Pressure Impregnation (VPI) to provide test specimens. The concentration of boron was defined by chemical analyses of the timber, in the zone of primary attack by the termite being bioassayed. A common method of definition of preservative retention, weight uptake of preservative...
A R Moffat, B C Peters
Treatment details for the field experiment to determine the performance of preservative treated hardwoods with particlar reference to soft rot
1977 - IRG/WP 384
These notes are compiled to complement and supplement Document No: IRG/WP/367 which described the plan for the treatment of the stakes, using a CCA preservative, for the field experiment. This document gives extra details of the treatment characteristics of the different timber species and as such may give IRG members useful information on the sapwood permeability of a range of hardwoods. The repo...
F W Brooks, M R Gayles
Field testing of alkylammonium wood preservatives
1983 - IRG/WP 3248
The field test performance of five alkylammonium wood preservatives is described. The relative effectiveness of three unmodified formulations was determined by calculation of a Performance Index. Of the three, didecyldimethylammonium chloride was found to be superior to octyldecyldimethylammonium chloride, and both were more effective than alkyltrimethylammonium chloride. However, none were consid...
J N R Ruddick
World survey on the status of pollution control in the field of wood preservation
1976 - IRG/WP 369
In 1974 the IRG/WP-Secretariat distributed a "Questionnaire on the state of pollution control in the field of wood preservation" which was prepared by the author. The questionnaire consisted of two parts. Part A asked "General questions" on - the position of wood preservation in the respective country - the use of preservatives - the type of application of wood preservatives in different fields - ...
H Willeitner
Hygroscopicity of decayed wood - Implications for weight loss determinations
1996 - IRG/WP 96-20085
Hygroscopicity changes were observed in red maple blocks subjected to brown rot, white rot and soft rot. Brown rot reduced hygroscopicity, soft rot increased hygroscopicity, and white rot showed only a very slight increase in hygroscopicity. The effect of these changes on weight loss tests is a slight overestimation of weight loss for brown rot and a slight underestimation for soft rot and white r...
S E Anagnost, W B Smith
The natural durability of wood in different use classes
2003 - IRG/WP 03-10457
The natural durability of important European wood species has been tested on 3970 specimen in field trials. The wood was exposed at five test fields in Germany with different climates at each site in European hazard class 4 and 3 (with and without soil contact). Within EHC 3 it was distinguished between tree different expositions (end grain sheltered, unsheltered and with water trap).
The test is...
U Augusta, A O Rapp
Termite-tunnels formation on the surface of termite-resistant wood species in field sites
2001 - IRG/WP 01-10400
In this report, termite-tunnels formation by the subterranean termite, Coptotermes formosanus Shiraki on the surface of termite-resistant wood species, namely, Hinoki (Chamaecyparis abtsu), Yoshino Hinoki (Chamaecyparis abtsu), Miyazaki Hinoki (Chamaecyparis abtsu), Hiba (Chamaecyparis abtsu) and Japanese cedar (Cryptomeria japonica) was conducted in field sites. Westernhemlock (Tsuga heterophylla...
Y Kadekaru, K Kinjo, S Yaga
Accelerated laboratory testing of preservatives on 13 North American wood species
1999 - IRG/WP 99-30201
The ability of selected water and solvent based biocides to protect wood against fungal attack was evaluated on 13 North American wood species using 7 decay fungi in a modified soil block test. Most preservatives were capable of providing protection at their recommended above ground and soil contact use levels. Many decay fungi caused substantial weight losses on blocks treated with chlorothalonil...
J J Morrell, C M Freitag
Observations on the performance of copper-based wood preservatives in fungal cellar (soil-bed) tests
1994 - IRG/WP 94-20047
Fungal cellar (soil-bed) tests are considered to be an important tool for the evaluation of the performance of ground contact wood preservatives. Facilities of this type have been established world wide although caution has been exercised in their introduction into standard testing methods for the approval of wood preservatives. This is the result of concerns over the variability in the biological...
G R Williams, D Rudolph, M E Hedley, J A Drysdale, R F Fox
The full guideline for the “double layer test method” - A field test method for determining the durability of wood out of ground
2004 - IRG/WP 04-20290
This guideline describes a test method for wood to be exposed to the weather out of ground contact. The main objective of the method is to evaluate the durability of wood in above ground exposure as shifted overlaid stakes, which form the so called double layer.
The method is applicable to the testing of untreated, treated and modified wood. Initially it was developed and found to be most useful ...
A O Rapp, U Augusta