Your search resulted in 817 documents. Displaying 25 entries per page.
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
Field evaluation of the above-ground susceptibility of Pinus heartwood and untreated or treated sapwood to two species of Australian subterranean termites
1996 - IRG/WP 96-10147
Plantation-grown Pinus elliottii, Pinus caribaea and Pinus radiata specimens containing heartwood and untreated or preservative-treated sapwood were exposed above ground to the subterranean termites Coptotermes acinaciformis or Mastotermes darwiniensis near Sydney (NSW), Brisbane and Townsville (Qld), and Darwin (NT), using a variety of exposure techniques. Heartwood of Pinus elliottii and Pinus c...
M J Kennedy, J W Creffield, R H Eldridge, B C Peters
Use of mixed populations of microflora to control sapstain on radiata pine
2002 - IRG/WP 02-10427
Most methods of biological control in the wood products field have focused on the use of single species of fungi or bacteria to control sapstain or decay. The approach taken in this study involved applying soil microorganisms, in combination with nutrients and various adjuvants that collectively form the biological control system.
Radiata pine branch discs, autoclaved or fresh, were dipped in ...
C Chittenden, R Wakeling, B Kreber
Laboratory studies on control of sapstain and mold on unseasoned wood by bacteria
1991 - IRG/WP 1493
A malt-agar and nonagar laboratory test was used to evaluate the efficacy of bacterial preparations as biological control agents against several sapwood-inhabiting fungi. Both nonsterilized and filter sterilized bacteria preparations prevented attack by the sapwood-inhabiting fungi. Streptomyces rimosus was the most effective bacteria, giving good protection, with a 1-hr soak in a filter-sterilize...
T L Highley, R Benko, S C Croan
Siderophore production by Trichoderma spp. and its importance in the biological control of wood decay fungi
1994 - IRG/WP 94-10070
Competition for iron as well as other micro-nutrients is an essential component of the microbial ecology of many ecosystems. A wide range of micro-organisms including fungi and bacteria have been shown to increase their ability to efficiently capture iron through the production of specialised iron chelating compounds called siderophores. Since iron is in low supply in wood and has been implicated ...
U Srinivasan, A Bruce, T L Highley
Facility for Conducting Field Tests on Coptotermes formosanus at LSU Agricultural Center
2003 - IRG/WP 03-20274
Efforts by Louisiana State University Agricultural Center (LSU AgCenter) and Mississippi State University (MSU) research scientists, to conduct cooperative research on C. formosanus and other wood-related topics, have led to establishing an FST field test site at the LSU Agricultural Center Citrus Research Experiment Station, Port Sulfur, Louisiana. A minimum of 32 termite colonies will be establi...
W R Smith, T L Amburgey, G Henderson, D R Ring
A soil-less test of treated wood
1978 - IRG/WP 2105
The objective of this work is to devise an accelerated test for preservatives to be used in places away from soil contact. There may be compounds or mixtures which will protect wood or wood derived materials from decay in such articles as sash and doors, boardwalks, steps, laminated arches and the like, and possess properties that make them preferable to the heavy-duty preservatives used for poles...
E A Behr
Lab and field test results for wood treated with polymeric alkylphenol polysulfide
2001 - IRG/WP 01-30268
A new wood preservative based on polymeric alkyphenol polysulfide (PXTS-A) is being evaluated in a series of laboratory and field tests and the results continue to show promise. A modified formulation (PXTS-B), which contains additives to reduce the viscosity, is being evaluated along with the original formulation. Soil block decay tests comparing PXTS-B with CCA-C indicate that PXTS-B is equally ...
J Goswami, A Abramson, R Buff, D D Nicholas, T Schultz
Performance of Two Imidacloprid-Treated Malaysian Hardwoods in an Accelerated Aboveground Termite Test
2005 - IRG/WP 05-30389
The performance of the chloronicotinyl insecticide imidacloprid as a wood protecting termiticide, under a simulated Malaysian biological hazard class H2 (exposure aboveground indoors against termites and wood borers), was evaluated by a novel termite field test protocol. Replicate end-grain sealed air dried test blocks (20 x 20 x 20 mm) of two Malaysian hardwoods, Kembang Semangkok (Scaphium spp.)...
A H H Wong
Effectiveness of some microbiocides against the development of molds and sapstain in Pinus elliottii
1981 - IRG/WP 3169
Eleven commercial biocidal formulations were tested in the field to determine their effectiveness in protecting logs and lumber of Pinus elliottii sapwood from sap stain and molds. Among these formulations 2-(thiocyanomethylthio) benzothiazole showed the best performance in controlling both types of fungi. Potassium N-hydroxymethyl-N-methyl dithiocarbamate and the mixture potassium N-methyl dithio...
S Milano
The remaining concentration of inorganic wood preservative components in EN 252 stakes after ground contact
2000 - IRG/WP 00-50159
In order to determine the biological efficiency and the remaining concentration of different inorganic and organic active ingredients during service, EN 252 specimens were impregnated with 3 copper based wood preservatives. The stakes were installed in the test field of the DESOWAG GmbH, Rheinberg, for at least 7 years. At the end of the field test some of these stakes were divided into 10 uniform...
E Melcher, H-W Wegen
A field trial of water repellents as anti-sapstain treatment additives
1987 - IRG/WP 3417
The assessment of water repellents as anti-sapstain treatment additives has been included in a recent FRI research programme investigating improved surface protection of New Zealand Pinus radiata. Laboratory work has shown variation in water repellent effectiveness with chemical type and subsequently a field trial was established to examine the performance of selected water repellent/anti-sapstain...
J A Drysdale, D V Plackett
Resistance of borate-treated lumber to subterranean termites in the field
1998 - IRG/WP 98-10255
Borate-treated wood samples were tested for their resistance against subterranean termites in the field. Wood samples (10.5x10.5x40cm3) of western hemlock were pressure impregnated with disodium octaborate tetrahydrate (DOT) and didecyldimethylammonium chloride (DDAC), and assigned into two groups on the basis of boron contents:high retention (1.5-2.2%BAE) and low retention(O.7~1.3%BAE). Eight rep...
K Tsunoda, A Adachi, T Yoshimura, A Byrne, P I Morris, J K Grace
Effect of Volatiles from Trichoderma species on the regulation of protein synthesis in Serpula lacrymans isolates
2002 - IRG/WP 02-10440
The growth of wood decay fungi has previously been shown to be inhibited by volatile organic compounds (VOCs) from selected Trichoderma isolates. No mechanism of action has however been established for such inhibition. This paper reports the effects of VOCs produced by Trichoderma pseudokoningii, T. viride and T. aureoviride on the growth of four dry rot isolates and corresponding protein synthesi...
S Humphris, R Wheatley, E Buultjens, A Bruce
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
Failure of overhead power transmission and telecommunication poles in Tanzania: Causes, preventive and remedial measures
1988 - IRG/WP 3465
Unless measures are considered urgently to combat massive pole failures occuring in service, it is likely that wooden poles may soon become unpopular. Consequently, pole users may be forced to use costlier alternatives such as underground cables and concrete or steel poles. In trying to countercheck this trend, this paper names the main agents of pole failure, discusses different models of pole fa...
K K Murira
Resistance of acetylated wood to biological degradation. Evaluation of field test
1997 - IRG/WP 97-30139
Acetylated wood samples were tested in ground contact (stake test) at two test fields, one in Simlångsdalen, Sweden, and one in Viikki, Finland, according to European standard EN 252. The test samples were inspected annually and their condition was compared with that of untreated controls and of samples treated with two reference CCA preservatives. The use of untreated controls and preservative t...
P Larsson Brelid, R Simonson, Ö Bergman
Control of termite attack using a trapping method and acoustic emission (AE) monitoring a case study at an electric power plant
1997 - IRG/WP 97-10224
To prevent subterranean termites (Coptotermes formosanus Shiraki and Reticulitermes speratus Kolbe) from invading the buildings of an electric power plant and to control their attack, artificial traps were buried around the buildings. The attack of the termites in and around the traps was monitored by detecting acoustic emissions (AE) generated by the feeding behavior of the workers. The cylindric...
Y Fujii, Y Imamura, E Iwatsubo, S Yamamoto
Termite physical barriers: Update on retrofitting Granitgard around 'mock up' buildings after four years
1996 - IRG/WP 96-10140
This field experiment was installed four years ago (March 1992) to evaluate the effectiveness of graded crushed granite stone, commercially marketed under the name, Granitgard, as a physical termite 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 ...
B M Ahmed, J R J French
Comparative field performance of CCA and CCA-water repellent treated Southern pine lumber
1995 - IRG/WP 95-30089
This paper describes the field performance of end-matched southern pine boards treated with either CCA type C or CCA type C containing an emulsion water repellent (WR) additive. Boards were either kiln or air-dried after treatment, constructed into decks, and exposed for over 3 years at Harrisburg, NC. During this exposure, matched boards were monitored for internal moisture content, cupping at mi...
A R Zahora
Pentachlorophenol and tributyltin oxide - the performance of treated Pinus radiata after 12 years' exposure
1986 - IRG/WP 3361
Pinus radiata samples were impregnated with a range of light organic solvent preservatives and copper/chrome/arsenic salt and exposed with no surface coating both in and above ground for 12 years. Inspection of the test samples revealed that some formulations of light organic solvent preservatives will give good fungal protection and reduce splitting in Pinus radiata exposed externally without a s...
R S Johnstone
Five years leaching of Boron
1999 - IRG/WP 99-30195
The diffusibility of Boron in wood and thus its leaching behaviour in water contact is known since long. Nevertheless quantitative data on the long-term leaching behaviour are rare. Consequently, field exposure tests were started with beam-segments treated with pure boric acid and with poles treated with CCB. Detailed data of more than five years of field exposure are now available. Pure boron tre...
A Peylo, H Willeitner
Field tests with Antiblue and Biocide TT for the prevention of sapstain and mould fungi on Pinus elliottii timber
1992 - IRG/WP 92-3682
Freshly cut and sawn Pinus elliottii timber was dipped in four concentrations of Antiblue (active ingredient sodium pentachlorophenate) and Biucide TT (local substitute), at four immersion times and stacked in the open at Chisengu sawmill. Five weeks later, the timber was assessed for the incidence and intensity of stain and mould. The results showed that Antiblue was the better chemical providing...
A J Masuka
Effect of nutrient regimes, temperature, pH, and wood sterilization method on performance of selected bioprotectants against wood staining fungi
1992 - IRG/WP 92-1551
The effect of nutrient regimes, incubation temperature, media pH, and wood sterilization method on performance of four potential bioprotectants (Pseudomonas putida, Pseudomonas cepacia, Bacillus subtilis, and Trichoderma harzianum) against wood staining fungi were evaluated using small ponderosa pine samples over a four week period. Incubation at 32°C resulted in slight increases in the degree of...
J J Morrell, C M Secton
Field Trials with mini-stakes
2002 - IRG/WP 02-20244
In 1995 an extensive field test program with wood mini-stakes, 8 x 20 x 200 mm, was started. In these trials a large number of parameters are being evaluated, including several new wood preservatives, differently chemically modified woods and natural durability of various wood species. The test sites are three fields in Sweden for in-ground and “close to ground” testing, one subterranean termi...
M Westin, A O Rapp, Y S Hadi, T Nilsson