Your search resulted in 182 documents. Displaying 25 entries per page.
Termite physical barriers: Is retrofitting with Granitgard an option?
1993 - IRG/WP 93-40011
Granite particles within the range of 2.4 to 1.7 mm diameter were recently adopted by the Standards Association of Australia as an alternative treatment to soil chemical barriers in protecting new buildings against subterranean termites. The granite substrate is sold under the commercial name, "Granitgard". However, there are many existing buildings that have no chemical or physical subterranean t...
J R J French, B M Ahmed
Lignicolous marine fungi from panels of different timbers exposed along Goa coast (India)
1993 - IRG/WP 93-10037
Colonisation by marine fungi on panels of thirty species of Indian timbers, ten species of imported timbers, marine plywood (coated with polyurethane as well as uncoated) and also on panels of five timber species treated with Copper-Chrome-Arsenic (CCA) and Copper-Chrome-Boric (CCB) preservatives, was studied by exposing test blocks in the Mandovi estuary, Goa (West coast of India) for periods ran...
L N Santhakumaran, S Chinnaraj, S G Sawant
Borates as wood preservatives - an environmental, health and safety perspective
1993 - IRG/WP 93-50001-03
Boron compounds are highly effective wood preservatives and have an established safe use in the timber treatment industry. Their widespread background occurrence in nature, low acute mammalian toxicity and useful properties make them versatile active ingredients within today's environmentally aware society. A critical review of health, safety and environmental data on the borates, their u...
J B Rainer
Applications of the shower test. Part A: Results from CCA type C treated wood: influence of fixation process
1993 - IRG/WP 93-50009
This report outlines the results of shower tests conducted on CCA type C treated wood. The results indicate the inherent good fixation of CCA type C, as judged by the leaching limits within the Environmental Regulations. The shower test has proven to be a useful quality control and research test. It determines reasonably accurately the leaching under simulated conditions and, admittedly from a lim...
W J Homan, H Militz, D A Lewis
Treatment application method and CCA efficacy in Corsican pine - Assessment by serial exposure and soil burial tests
1993 - IRG/WP 93-40006
A previous report on this research (Newman and Murphy, 1992) identified possible variation in the efficacy of a CCA preservative applied to Corsican pine (Pinus nigra var. maritima) dependant upon the treatment application method (Bethel, Lowry or Steam/Bethel). This paper presents further data from biological testing of CCA treated Corsican pine using serial exposure and unsterile soil techniques...
P R Newman, R J Murphy
An evaluation of the efficacy of a chlorothalonil formulation and a chlorothalonil plus chlorpyrifos formulation in the field
1993 - IRG/WP 93-30005
Details on the treatment of Pinus radiata D. Don and Eucalyptus regnans F. Muell. sapwood specimens to three retentions of each of two preservative formulations (chlorothalonil in oil; chlorothalonil plus chlorpyrifos in oil) and their installation below ground at three field test sites in Australia are given. Specimens were treated with each formulation to achieve 3.2, 6.4 and 12.8 kg/m³ of chlo...
J W Creffield, N Chew
Distribution of the three symbiotic protozoa in Formosan subterranean termite, Coptotermes formosanus Shiraki (Isoptera: Rhinotermitidae)
1993 - IRG/WP 93-10010
Six colonies (three each from laboratory and field) of Formosan subterranean termite, Coptotermes formosanus Shiraki, were served for investigating the abundance and distribution of three symbiotic protozoa in the hindgut of workers. The total protozoan number amounted to 6,000-10,000 per a worker, and the order of the abundance of the three protozoa and the proportional distribution of each speci...
T Yoshimura, K Tsunoda, M Takahashi
The metabolism and comparative elimination of polychlorinated biphenyl congeners in termites
1993 - IRG/WP 93-10038
Termites may serve as a potential supplementary food source for fish, poultry and pigs. Waste paper may be used as a source of food in mass rearing the termites. However, paper products and printing inks contain trace levels of toxic xenobiotics e.g. polychlorinatecl biphenyls (PCBs) and dioxins. This study examined the ability of Mastotermes darwinensis and Coptotermes acinaciformis to metabolise...
V S Haritos, J R J French, J T Ahokas
Assessment of untreated Papua New Guinea timbers against subterranean termites. Final report
1993 - IRG/WP 93-10041
Four years after the exposure of eight timber species of varying density against subterranean termites in a field trial, Kwila was still generally sound while Taun, Malas and PNG Walnut were beginning to be attacked slightly to moderately. Calophyllum, Kamarere, PNG Beech and White Cheesewood were severely attacked and failed. Results after the period of exposure shows that Kwila rates highly as t...
H C Konabe, M Rokova
Treatment of refractory timbers
1993 - IRG/WP 93-40001
Worldover crisis of wood is being felt due to the global environmental problems. Wood preservation technology plays a good role in curtailing the demands of wood for replacement by prolonging the service life of the timber and thus indirectly helps in saving the environment. Some species of timbers which could not be treated to the desired level by virtue of their refractory nature by any of the c...
I Dev, S Kumar
A methodology for the life-cycle assessment of treated timber products
1993 - IRG/WP 93-50001-01
Using case studies of CCA-treated motorway fenceposts and creosote-treated electricity transmission poles, the paper suggests an approach to evaluation of the overall environmental impact of treated timber products, utilising the emerging systems analysis method of life-cycle assessment (LCA). The development and application of LCA methodologies to date is reviewed and the key features identified....
S R Smith, R J Murphy, D J Dickinson
A non-pressure method of protection based on hurdle theory to control the spectrum of internal environmental factors which affect the decay of poles in soil contact
1993 - IRG/WP 93-20005
A field trial was conducted to establish whether superficial barrier linings on poles in soil contact could function as environmental hurdles against the growth of biological agents and thus provide preventative methodology to preclude premature failure of vineyard poles under flood-irrigation. Assessment after 52 weeks exposure to the prevailing conditions and sub-tropical environment showed that...
A A W Baecker
Supercritical fluid treatment: Effects on bending strength of white spruce heartwood
1993 - IRG/WP 93-20008
The effects of supercritical carbon dioxide on wood strength were evaluated using white spruce heartwood, a species known to be especially susceptible to collapse during exposure to higher pressures. The effects of pressures of 2000 or 3600 psig and temperatures of 40 or 80°C were evaluated using 30 or 60 minute exposure periods. No significant differences were noted in modulus of rupture or modu...
S M Smith, J J Morrell, E Sahle-Demessie, K L Levien
Laboratory evaluation of copper naphthenate pressure treatments against the Formosan subterranean termite
1993 - IRG/WP 93-10005
Southern pine wafers and Douglas-fir cubes pressure treated with copper naphthenate in AWPA P9 Type A oil or in toluene were evaluated for resistance to attack by the Formosan subterranean termite, Coptotermes formosanus Shiraki (Isoptera: Rhinotermitidae). Wood samples were pressure treated to target copper retentions of 0.040, 0.075, 0.095, or 0.150 pcf, conditioned to simulate field exposure, a...
J K Grace, R T Yamamoto, P E Laks
The use of preservative containing waste wood as substrate for growing greenhouse crops
1993 - IRG/WP 93-50011
In the Netherlands a large amount of waste wood and wood waste is produced every year. An important part of this amount comes from the pallet and packaging industries. One of the possibilities to re-use this relatively clean material is to convert it into substrates for growing crops in glass houses instead of the commonly used materials such as rock wool and glass wool. In this research, the infl...
W J Homan,H Militz
Surface retentions of PCP, TCMTB and MTC obtained during a field trial of antisapstain formulations
1993 - IRG/WP 93-20002
Formulations containing NaPCP or TCMTB and MTC were included as reference products in a recent field trial of antisapstain formulations in Queensland. Retentions of these actives on the surface of treated sawn Pinus elliottii were monitored by ultrasonic solvent extraction of excised samples and analytical determination by high performance liquid chromatography. Distribution of actives with depth ...
D E Ferlazzo, M D Needham, M J Kennedy
The fate of salt preservatives in facility yard soils and decontamination of soils and drainage waters
1993 - IRG/WP 93-50001-25
Extensive studies during the past 10 to 15 years revealed that noticeable amounts of preservative components may be released in the environment by dripping off or by rain prior to fixation unless adequate precautions are taken. Therefore, soil and groundwater contamination especially from chromium-VI compounds but also from other inorganic and organic constituents exist in impregnation plants, pos...
R-D Peek, H Klipp, K Brandt
Comparison of performance of wood preservatives in laboratory and field tests of treated commodities
1993 - IRG/WP 93-20010
The purpose of laboratory tests for evaluating efficacy of wood preservatives is usually to establish toxic values against standard strains of wood decay fungi. Exposure conditions are usually chosen as optimal for fungal growth. Toxic values so determined serve as a guide as to expected performance of the preservative in field stake tests or in above ground exposure tests. Test material is select...
M E Hedley
Solidification - A viable option for the safe disposal of CCA treatment plant wastes
1993 - IRG/WP 93-50001-21
Treatment plant operations generate small quantities of waste materials contaminated with wood preservatives - for example, sludges, contaminated sawdust, yard dirt. A practical system involving the immobilisation of such wastes has been established to assist the operators to safely dispose to landfill sites. The results of cold water and hot dilute acid leaching regimes are described, which simul...
M R Gayles, D Aston
Computer-assisted ranking of potential biocontrol fungi based on data from laboratory screening trials
1993 - IRG/WP 93-10023
Forty two fungal isolates were screened for antibiotic activity. In these sceering tests inhibition of target wood decay fungi was expressed as a series of numerical scores for each isolate. These scores, along with values for 5 other charactetistics, were used to assess the isolates. Using selection indices, isolates were judged on the basis of all the characteristics combined and, ranked in orde...
M W Schoeman, D J Dickinson
Premature failure of CCA treated vineyard posts from brown rot
1993 - IRG/WP 93-10016
A survey of CCA (AWPA Type C) treated posts used as grape vine trellis supports, to determine the extent and type of decay was carried out at a terraced vineyard in the Hawkes Bay region of the North Island of New Zealand. Of 357 posts examined out of a total of 970 in the vineyard, 47% had moderate to severe decay or had failed, 20% had established decay, 10% had a trace of decay and 23% had no s...
R N Wakeling, A P Singh
The improvement of wood durability by retification process
1993 - IRG/WP 93-40015
A material with new properties is obtained by retification process. It consists of a light pyrolysis of wood which becomes more stable and especially more resistant to fungal attack with few decrease of mechanical properties. Tests were carried out on three susceptible wood species (Poplar, Spruce, Fir) that are used in construction and are difficult to treat with wood preservatives. Retified wood...
D Dirol, R Guyonnet
Relative merits of laboratory and field tests for assessing wood decay resistance
1993 - IRG/WP 93-20009
Laboratory and field trials have long been employed for assessing natural durability of a variety of wood species, but there is a continuing debate concerning the relative merits of approach. While laboratory tests provide carefully controlled conditions for decay, they are often criticized for being too artificial to produce meaningful results. Conversely, field trials often vary widely between t...
T C Scheffer, J J Morrell
Persistance of active ingredients in treated wood
1993 - IRG/WP 93-50001-20
Disposing of chemically protected waste wood implies the distinction between surface and pressure treatment. Considering that barked round-wood merely contains, after 7 months open storage, less than 30 g per ton of bark or 25 mg per ton of sapwood, depending on the type of insecticide, the bark or sapwood shavings may be incinerated normally, according to less severe legal prescriptions than for ...
E Graf, P Manser, S Rezzonico, B Zgraggen
Detoxification of methylene bisthiocyanate by bacteria isolated from freshly felled, anti-sapstain treated timber
1993 - IRG/WP 93-10017
The microbial defacement of freshly-felled timber treated with organic biocides continues to be a major problem in stored lumber. As part of a study to investigate the depletion in chemical activity of methylene-bis-thiocyanate (MBT) in green timber, bacteria were isolated from freshly-felled boards of Corsican pine (Pinus nigra var. maritima Arnold) previously treated with different biocides. The...
R J Wallace, R A Eaton, G R Williams