Your search resulted in 696 documents. Displaying 25 entries per page.
Preliminary Studies on ZiBOC- A Potential Eco-friendly Wood Preservative
2005 - IRG/WP 05-30372
Over the past decade, the wood processing industry has been increasingly involved in strategies to minimize the environmental impacts of treated wood. One sign of this is the dramatic increase in the use of preservatives based on inorganic metal oxides, which fix in wood. Among such preservatives the most common is chromated-copper-arsenate. In Ascu chromium and arsenic both are carcinogenic thus...
S Tripathi, J K Bagga, V K Jain
Studies on the effect of salinity on the growth and mortality of Teredinids in Papua New Guinea
1977 - IRG/WP 432
Population fluctuations seen in the teredinid species settling in estuarine waters at Marshall Lagoon over a 3 year period were correlated with the salinity fluctuations to which they had been subjected. From these calculations the salinity range in which the most common species settled was determined. Studies in the aquarium were designed to test the salinity range of these teredinids under contr...
S M Rayner
Efficacy of Avermectin B1 dust and bait formulations in new simulated and accelerated field tests
1985 - IRG/WP 1257
Avermectin B1 on a silica carrier dust was used in dust and bait formulations whose efficacy against Reticulitermes flavipes was assessed in new simulated and accelerated field tests. A 0.5 mg avermectin/mg dust and a bait with 50 ppm avermectin in paper pulp sandwiched between pieces of corrugated boxboard caused nearly complete mortality in bioassays and suppression of foraging in field tests. T...
G R Esenther
The development of a field testing technique using Coptotermes lacteus mounds in Australia
1985 - IRG/WP 1270
A method to rapidly screen potential bait substrates placed around Coptotermes lacteus mounds is described. A perforated P.V.C. conduit is buried in a shallow trench in a rectangular arrangement around an active mound. Seven P.V.C. holders containing cork baits are inserted vertically into the conduit around the mound. Within three weeks following installation of the baits around five mound coloni...
J R J French, P J Robinson
Performance of borate-treated lumber in a protected, above-ground field test in Japan
2004 - IRG/WP 04-30344
This document is supplemental to the previous IRG document (Tsunoda et al., 2002).
An experiment to simulate the sill plate (dodai) of the Japanese houses was conducted at the termite field test site of the Wood Research Institute in Kagoshima, Japan where two economically important subterranean termite species [Coptotermes formosanus Shiraki and Reticulitermes speratus (Kolbe)] are established. ...
K Tsunoda, A Byrne, P I Morris, J K Grace
Termite physical barriers: update on retrofitting Granitgard™ around 'mock-up' buildings after five years
1997 - IRG/WP 97-10226
This field experiment was installed five years ago (March 1992) to evaluate the effectiveness of graded crushed granite stone, commercially marketed under the name Granitgard™, as a physical barrier when retrofitted around 'mock-up' buildings. The field site is located at Walpeup in the semi-arid mallee region of north-west Victoria (360 km from Melbourne), and there are eight ...
J R J French, B M Ahmed
A field trial to assess the potential of antisapstain chemicals for long-term protection of sawn radiata pine
1986 - IRG/WP 3375
Seven chemical formulations were tested as antisapstain treatments for freshly sawn radiata pine sapwood (90x50 mm²). Each formulation was used with and without a water-repellent additive and was sprayed on to 1 m long boards. The boards were then stacked into "mini" packets and stored unprotected from the weather for 6 months. Haipen 50w (at 0.2 or 0.4% active) and NaPCP (1% active) plus 1.5% bo...
J A Drysdale
Microbial ecology of treated Lap-joints exposed at Hilo, Hawaii for 24 months
1997 - IRG/WP 97-20107
This paper is a continuation of previous work reported in IRG/WP 96-20089 by Molnar et al. (1996) in which Lap-joints, made from Southern yellow pine and treated with ACQ, DDAC or propiconazole were sampled over 12 months exposure at Hilo, Hawaii. 18 and 24 month samplings have since taken place and are reported here. TnBTO treated Lap-joints made of scots pine which were exposed later as a standa...
S Molnar, D J Dickinson, R J Murphy
Leaching of components from CCF treated timber in ground contact
1998 - IRG/WP 98-50108
In order to investigate the depletion of different CCF-salts during service small stakes (10*10*450mm³) were treated with five water-borne wood preservatives and after fixation brought into ground contact for several years. After failing some of the broken down stakes were used to determine the remaining concentration of relevant ions and their distribution in different segments of the stakes.
A...
E Melcher
A simple field apparatus for measuring relative gaff penetration and assessing the effect of additives for improving pole climbability
2000 - IRG/WP 00-20187
A simple apparatus for measuring and comparing the relative "hardness" of utility poles is described. This "slide-hammer" gaff penetration apparatus was designed as a field testing unit to measure the depth of gaff penetration into test poles after application of a uniform and reproducible force to the gaff. The apparatus is simple to use in both the laboratory and field. Data is provided for resu...
A R Zahora
Assessment of the biocontrol potential of a Trichoderma viride isolate in a field trial
1998 - IRG/WP 98-10252
A field trial has been set up near Dundee, to assess the biological control potential of a Trichoderma viride isolate T60. This isolate has been shown in laboratory tests to be particularly effective in protecting wood against certain basidiomycete decay fungi.
Wood was treated with T60 spores using vacuum-pressure impregnation in a pilot preservation plant. Scots pine and Sitka spruce stakes wer...
H F Brown, A Bruce
Examination of power poles by computerized tomography
1980 - IRG/WP 2142
The technique known as computed axial tomography (CAT or CT) has become widely known because of the success it has achieved in medical imaging and diagnostics. It has now been used to give non-destructive crosssectional pictures of a variety of industrial objects, including wooden power poles, with a spatial resolution of about 1 mm (0.04 in.). It is obvious the benefits that would be derived from...
J A Taylor, I L Morgan, H Ellinger
Methods of testing anti-stain chemicals for protecting sawn timber during storage and transport
1976 - IRG/WP 273
No international standard method for testing anti-stain chemicals for protecting fresh sawn timber exists. The methods used can be divided into three types: a) Rapid screening tests for finding chemicals effective against blue-stain and mould fungi. The chemicals are tested in agar medium, in pieces of filter paper or on small pieces of wood using pure cultures. b) Laboratory tests for evaluating ...
T Vihavainen
A novel method for evaluating the performance of water repellents
1987 - IRG/WP 2279
Application of water repellent formulations to timber surfaces offers protection from the weather, reducing degrade and movement. A novel test method has been developed to evaluate the comparative efficacy of such formulations when samples are exposed to weather. The method uses sapstain free sapwood of defect free, untreated, seasoned Radiata pine, (Pinus radiata D. Don.) Water Repellency was det...
A R Moffat
A novel technique for comparative toxicity studies of potential insecticidal wood preservatives
1983 - IRG/WP 2198
For some years now a device has been under development at the New Zealand Forest Research Institute, the purpose of which is to study the effects of sub-lethal amounts of stomach poisons (but also of fumigants and contact active materials) on the co-ordinative abilities of a cerambycid larva. This insect is Prionoplus reticularis - indigenous to New Zealand its larvae feed in decaying logs and are...
D J Cross
The critical timing of inspections for field testing of natural durability
1994 - IRG/WP 94-20018
An overestimation of performance will almost always result if the condition of a specimen is considered to be attained at the precise time that an inspection is carried out. The time at which the condition is actually attained, referred to in this document as the "Condition time", is best considered to be halfway between two successive inspections. The requirement to obtain data that is relevant t...
J D Thornton
Assessment of untreated Papua New Guinean timbers against subterranean termites. Progress Report 1
1990 - IRG/WP 1436
Eight major commercial timber species (Intsia palembanica, Pometia pinnata, Homalium foetidum, Dracontomelon dao, Calophyllum spp., Eucalyptus deglupta, Nothofagus spp., and Alstonia scholaris) were exposed in ground contact against termites. Five replicates of heartwood stakes of 25x25x250 mm³ of each species were randomly embedded in the soil. Results after 24 months exposure showed that Kwila ...
M Rokova, H C Konabe
Susceptibility of heartwood of three Pinus species to attack by the subterranean termite Coptotermes acinaciformis (Froggatt)
1994 - IRG/WP 94-20026
Heartwood of plantation-grown Pinus elliottii (slash pine), Pinus caribaea (Caribbean pine) and Pinus radiata (radiata pine) was obtained from a range of locations throughout Australia and New Zealand for use in a field bioassey with subterranean termites. Timber stock was analysed for a number of stilbene and flavonoid heartwood extractive components which could contribute to variation in suscept...
M J Kennedy, L L Dixon, B C Peters
Biological Control of Bluestain - Log Field Trials in Canada
2002 - IRG/WP 02-10423
In the summer of 2000 we ran two field experiments (in Alberta and British Columbia) to test the feasibility of using an albino bluestain isolate (Cartapip97TM) to protect lodgepole pine logs from being stained by wild-type bluestain fungi. Results showed that Cartapip applied at the recommended concentration significantly reduced the amount of stain found in the Alberta
trials. Cartapip applie...
A Uzunovic, D Minchin, A Byrne
Immunolabelling studies on the detection of enzymes during the degradation of wood by Phanerochaete chrysosporium
1988 - IRG/WP 1364
The degradation of lignin in native lignocellulosic substrates by white rot fungi is poorly understood. Biochemical studies have shown the involvement of a number extracellular ligninolytic enzymes released by white rot fungi which are capable of the oxidative conversion of DHP's (lignin model compounds) in vitro, but to date conclusive evidence for occurrence of these enzymes in wood und...
G F Daniel, T Nilsson, B Pettersson
Effects of CCA treatment on settlement and growth of barnacles under field conditions
1998 - IRG/WP 98-50116
As part of a field experiment at seven European marine sites evaluating the effects of CCA treatments on non-target marine organisms, panels treated to nominal loadings of 12, 24 and 48 kg/m3 CCA were exposed at marine sites around the coast of Europe. Within two weeks of exposure, a heavy settlement of barnacles took place on the panels exposed intertidally in France. The intensity of settlement ...
S M Cragg, C Brown, R M Albuquerque, R A Eaton, P Goulletquer
Leaching from field test stakes. Results from two different methods of analysis
1993 - IRG/WP 93-50013
Field test stakes treated with Boliden K33 containing copper, chromium and arsenic exposed at three different fields in Sweden and rejected due to decay, have in two studies been analysed regarding leaching and remaining preservatives. The stakes have been exposed during 20 to 43 years. The density of the stakes and content of copper, chromium and arsenic have been determined in the top part of th...
F G Evans, M-L Edlund
Preservative treatment of round bamboos by a new technique - Some further studies. Part 1
1990 - IRG/WP 3607
In general, the easy susceptibility of bamboos to wood destroying agencies is a major constraint in its rational utilisation. This is more so in tropical countries like India where wood destroying agencies are quite active. In an earlier publication, it was reported that round bamboo specimens of Bambusa balcooa, having three nodes, could be satisfactorily treated by CCA by a new technique develop...
V R Sonti, B Chatterjee
Performance of above ground decay test units treated with a substituted isothiazolone
1989 - IRG/WP 3503
RH 287, a substituted isothiazolone, was evaluated for efficacy against decay fungi in an above ground test in Mississippi. After 45 months of exposure, all test units that were pressure treated with this biocide at levels of 0.026 pcf and higher have no deterioration. In addition, the test units that were dip-treated with a solution concentration of 0.5% also have no deterioration. Compared to pe...
D D Nicholas, J A Wilson, D E Greenley
A field evaluation of chromated fluoride as a remedial treatment for creosoted wooden distribution poles
1989 - IRG/WP 3556
A commercial chromated fluoride formulation was applied by injection process to previously inoculated creosoted wooden distribution pole sections at a field site in Scotland and appraisal of the efficacy of the formulation against Lentinus lepideus was undertaken at two month and fifteen month intervals. Preliminary results suggest a rapid elimination of organisms from colonised areas. The usage o...
B King, A Bruce