Your search resulted in 65 documents. Displaying 25 entries per page.
An example of media response to perceived environmental problems with CCA-treated wood
1990 - IRG/WP 3564
A recent study suggested that CCA-treated wood exposed to acidic precipitation could lose significant amounts of copper chromium and arsenic resulting in loss of efficacy and possible environmental contamination. The study received wide newspaper and radio coverage in Canada, thereby heightening public concern about CCA use. Subsequent studies in our laboratory confirmed that the high losses were ...
P A Cooper
A medium for mass culturing of a bamboo boring beetle Dinoderus minutus Fabricius
1983 - IRG/WP 1182
The bamboo is a traditional product of Japan. But its susceptibility to insects is one of the most important problems. The author has found that for the determination of the effectiveness of insecticides it is very easy to obtain sufficiently numerous adults of Dinoderus minutus by using Buckwheat Cake. The Buckwheat Cake is prepared with buckwheat flour and thin paper. The author has previously f...
K Suzuki
Successive collections of Basidiospores from wood decay fungi (in vitro) show variation in germination levels on common media
1978 - IRG/WP 191
In the course of various preliminary experiments in which spore germination levels of 6 decay fungi on malt and water agar were recorded as controls, it was noted that one could not reliably obtain an expected level of spore germination for any particular fungus. Inconsistent 'control' spore germination levels of a fungus greatly complicates large scale experiments in which compa...
E L Schmidt, D W French
A technique for the quantitative isolation of Actinomycetes from decayed wood
1980 - IRG/WP 1116
A technique combining comminution and high-speed homogenisation has been developed for the preparation of suspensions of micro-organisms in colonised wood. When standard inocula of Streptomyces spores were applied to wood, constant proportions of the inocula were recovered. This method was used in conjunction with selective culture media to isolate actinomycetes from wood which had been buried in ...
A A W Baecker, B King
Spore germination of Gloeophyllum trabeum on wood is related to the mass of the wood sample
1978 - IRG/WP 2118
E L Schmidt, D W French
Environmental issues: Messages for the wood preservation industry
1985 - IRG/WP 3353
A review of the origins and structure of environmental legislation throughout those territories of the world where wood preservation is a major industry is given. The implications of media, industry and legislation interaction is discussed and suggestions made as to the key issues the wood preservation industry should concentrate its attentions on in the immediate future....
D G Anderson, P Waldie
The isolation of actinomycetes from wood in ground contact and the sea
1980 - IRG/WP 1110
M S Cavalcante, R A Eaton
First draft of a monographic card for Peniophora gigantea (Fr.) Mass
1975 - IRG/WP 137
J Wazny, A Grzywacz
Decrease of the antidecay resistance of beech wood treated with organotin fungicides after its natural ageing
1998 - IRG/WP 98-30185
The antidecay resistance of beech-wood samples (120 x 8.5 x 8.5 (MM)) treated with tributyltin fungicides gradually decreased due to prolongation of their natural ageing:
tributyltin fungicides (TBTO, TBTS, TBTCA, TBT-DEDTK were applied by pressure impregnation technique in ethanole solutions (c = 0. 1%, 0.33% or 1%);
treated beech-wood samples were naturally aged without their contact with grou...
L Reinprecht
Effect of media composition on the antagonistic properties of Trichoderma spp. against wood decay fung
1992 - IRG/WP 92-1538
Most screening of potential biocontrol agents of wood decay fungi has previously been undertaken using artificial media. Similarly experiments designed to evaluate the mechanisms involved in antagonism between biological control agents and target fungi, have largely been carried out in conditions which do not accurately reflect the nutrient status of wood. This paper examines the influence of nutr...
U Srinivasan, A Bruce, H J Staines
A modified method to determine the toxic values of chemicals against Lyctus africanus (Lesne) by larval transfer method (laboratory method)
2005 - IRG/WP 05-20309
Lyctus africanus (Lesne) is the commonest species widely distributed by trade throughout India. It is one of the most important insect pest attacking logs, branchwood and and practically every kind of manufactured wooden article that contains sapwood. Presently, in India many short rotation and alternate timbers are being used for making many finished products .The inclusion of sapwood containin...
R Muthukrishnan, O K Remadevi
The use of modulus of rupture and modulus of elasticity in natural durability testing
1997 - IRG/WP 97-20117
Losses in weight, losses in bending strength and changes in elastic behaviour were assessed in a fungus cellar test with beech wood stakes (Fagus sylvatica). Results were gained after 8, 12, 16 and 20 weeks resp . The outcomes show, that the non-durable species beech is very rapidly attacked by fungi and loses up to 60% of its initial bending strength even within the first 8 weeks. Earlier researc...
L Machek, H Militz, W Gard
Soft rot decay in acetylated wood. Chemical and anatomical changes in decayed wood
2002 - IRG/WP 02-40231
Acetylated Beech (Fagus sylvatica) and Scots Pine (Pinus sylvestris) wood were studied in soil beds under laboratory conditions for longer periods. High mass losses and dynamic MOE losses were measured in non-acetylated wood and at lower weight percent gains (WPG). Rapid losses of lignin, holocellulose and ?-cellulose occurred in non-acetylated beech wood and no losses were detected at the highest...
B Mohebby, H Militz
Effect of cyclic change of temperature on fungal growth and mass loss
1994 - IRG/WP 94-10065
For estimating the effect of cycling change of temparature on fungal growth, four Japanese species, sugi (Cryptomeria japonica), hinoki (Chamaecyparis obtusa), akamatsu (Pinus densiflora) and buna (Fagus crenata), four fungal species, Tyromyces palustris, Gloeophyllum trabeum, Coriolus versicolor, Pycnoporus coccineus, and five temperature conditions, 10, 20, 27, 35°C and cyclic temperature (20°...
K Suzuki, K Okada
Assessment of wood decay in small-scale unsterile soil-bed tests
1997 - IRG/WP 97-20111
This study is concerned with the investigation of wood decay in small-scale unsterile soil-bed tests. Tests were performed with untreated heartwood samples from five hardwood species of different natural durability classes ranging from highly perishable to very resistant. Our results confirmed the critical role of soil moisture content on wood decay. The highest decay rates were observed at moistu...
L Machek, A M Derksen, R Sierra-Alvarez
Antifungal properties of metabolites produced by Trichoderma isolates from sawdust media of edible fungi against wood decay fungi
1994 - IRG/WP 94-10051
Trichoderma isolated from a sawdust medium of Pholiota nameko produced filtrates which had antifungal activities to four wood decay fungi tested on the agar plates. Filtrates produced from another isolate, from a sawdust medium of Lentinus edodes, had antifungal activities only to the white rot fungi, Coriolus versicolor and Pycnoporus coccineus. These results did not agree with those from earlier...
S Doi, M Mori
Evaluation of wood durability by laboratory test - A new equation to predict wood durability
2001 - IRG/WP 01-20230
To estimate the wood durability in a short term, periodical weight determination was carried out in a laboratory test. This test provided the results comparable to those of the field test and the fungus cellar test, but it required much more jobs in comparison to the usual accelerated laboratory test. To save the time and jobbing for this method, a new equation was devised from simple two assumpti...
I Momohara, K Yamamoto
New perspectives on the biology of the tropical powderpost beetle, Minthea rugicollis (Walk.)
1994 - IRG/WP 94-10085
Minthea rugicollis (Walk.) is one of the most important pests of seasoned hardwoods in the tropics. The species owes its ubiquity largely to its insidious development within a nutrient-filled environment and also to a strong coevolutionary specialization with its natural habitat, wood. Such an environment provides a buffer to extrinsic fluctuations and accounts for a wider range of tolerance by im...
F Abood, R J Murphy, R W Berry
Growth of selected wood decay fungi on various agar-supplemented media
2003 - IRG/WP 03-10456
The growth rates of a selection of wood decay fungi (brown and white rots) on various agar-supplemented media have been determined and compared. The agar media investigated were Malt extract agar (MEA), Potato dextrose agar (PDA), YMPG agar (yeast extract, malt extract, bacto-peptone, glucose, asparagine and thiamine), YMPG agar (without amino acids) and Beech wood powder agar (BWA). The tested wo...
S A Amartey, M Humar, F Pohleven
The WOODCARE project: Development of detection methods for Death watch beetle larvae and fungal decay
1999 - IRG/WP 99-20172
Woodcare was a European project coordinated by English Heritage. The aim of the research was to develop more targeted and more environmentally friendly treatment methods for Death watch beetle infections in Oak constructions of historical buildings. TNO has developed two new methods for fast and reliable detection of Death watch beetle larvae and related fungal decay in Oak. The problem with Death...
P Esser, P Van Staalduinen, A C Tas
Laboratory testing of wood natural durability - In soil-bed assays
1998 - IRG/WP 98-20141
Laboratory methods for assessing wood decay resistance are being investigated in the framework of an ongoing European research project. This paper summarizes the main results obtained for soil-bed tests based on the European prestandard ENV 807-Test 2. The data suggest that this testing methodology is suitable for evaluating the natural durability of timber species in soil-contact under conditions...
R Sierra-Alvarez, I Le Bayon, J K Carey, I Stephan, J Van Acker, M Grinda, G Kleist, H Militz, R-D Peek
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
A dynamic approach to assess the modulus of elasticity in wood decay testing
1998 - IRG/WP 98-20139
In this study, the changes in elastic behaviour and mass losses of different hardwood and softwood species exposed to decay in a laboratory soil tests were assessed. Wood decay was monitored using different assessment methods, namely: mass loss and changes in elastic behaviours (MOE) determination. Elastic changes were determined by static and dynamic methods, for the latter, acoustic technique wa...
L Machek, H Militz, R Sierra-Alvarez
The use of selective media for studying the colonization of wood in ground contact by microorganisms
1978 - IRG/WP 186
In October1976 a field trial was set up in order to monitor the progressive colonisation of wood in ground contact using orientated small stakes of Scots pine (Pinus sylvestris) and birch (Betula sp.) (30 x 45 x 250 mm³). Half the number of each species were treated with a 1% solution of CCA by a vacuum impregnation process. All the stakes were coated on three sides with an epoxy-resin sealant to...
C P Clubbe
Analysis of volatile organic compounds (VOC's) from Trichoderma spp.: effect of media composition on VOC production and level of inhibition of wood decay fungi
1997 - IRG/WP 97-10207
Production of volatile organic compounds (VOC's) by two Trichoderma isolates grown on either malt extract or minimal media was examined and statistically assessed to identify which VOC's were predominantly produced on each of the two media types. The VOC's were captured onto chromatographic absorbent from above the cultures of the fungi before being analysed by integrate...
A Bruce, R E Wheatley, C Hackett, A Kundzewicz