Your search resulted in 164 documents. Displaying 25 entries per page.
A 53-year old field trial to evaluate the performance of a range of chemical treatments on eucalypt poles
1989 - IRG/WP 3526
Hardwood pole stubs of Eucalyptus maculata, Eucalyptus pilularis, Eucalyptus saligna and Eucalyptus paniculata were examined for termite attack and fungal decay after 53 years in ground contact. The trial compared eight different chemical treatments with untreated pole stubs of the four species investigated. Untreated Eucalyptus paniculata, a Class I durability species, performed particularly well...
R S Johnstone, R A Eaton
Limnoria quadripunctata Holthuis - a threat to copper-treated wood
1983 - IRG/WP 4100
This paper presents the first reported attack by the crustacean marine wood-borer Limnoria quadripunctata Holthuis of CCA treated eucalypt piles. The attack occurred after 12 years service of the piles in the River Derwent at Hobart, Tasmania. Attack by both this borer and Limnoria tripunctata Menzies is also reported in CCA treated softwoods and hardwoods over periods ranging from 5 to 22.9 years...
J E Barnacle, L J Cookson, C N McEvoy
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
The micro-distribution of copper/chrome/arsenate in Acer pseudoplatanus and Eucalyptus maculata
1973 - IRG/WP 319
The excellent field performance of copper-chrome-arsenate (CCA) treated timber has been accepted for many years. The preservative loadings used in practice have been based on field trial results, backed by service tests. The performance of treated hardwoods in trials and practice indicated that provided the required loading and penetration could be achieved the performance would be good. Recent un...
D J Dickinson
The effects of pH on leaching of copper-chrome-arsenate (CCA) from pressure-treated Kenyan-grown Eucalyptus saligna and Acacia mearnsii: Initial findings.
2002 - IRG/WP 02-30298
The effects of pH on leaching of CCA from pressure-treated Kenyan-grown Eucalyptus saligna and Acacia mearnsii were tested under laboratory conditions. Small samples of the two species (100mm x 30mm x 40mm) were smooth sawn from 8-year old trees to represent equal amounts of both sapwood and heartwood, air-dried to 12% moisture content, end-sealed, and pressure-treated at a commercial treatment p...
R Venkatasamy
A determination of the toxic level of ACQ2100 wood preservative for the powder post borer Lyctus brunneus (Stephens)
1994 - IRG/WP 94-20029
The sapwood of two Lyctus susceptible Australian hardwoods, messmate (Eucalyptus obliqua L'Herit.) and black bean (Castanospermum australe A. Cunn. et Fraser ex Hook) were pressure impregnated with ACQ2100, a wood preservative, to produce replicates of a range of retentions. Preservative retentions were determined by solution weight uptake at treatment and chemical analyses of selected sa...
A R Moffat
Experimental variations in the distribution of CCA preservative in lignin and holocellulose as a function of treating conditions (temperature, concentration, pH, species, and time)
1984 - IRG/WP 3277
The exact distributions between lignin and holocellulose and retentions on wood of copper, chromium and arsenic as a function of various sets of conditions in a 3x3x4x2 factorial experiment in which combinations of three temperatures of treatment, three CCA solution concentrations, four pH's of the initial CCA solution and two timber species, namely Pinus radiata and Eucalyptus grandis, a...
A Pizzi, E Orovan, M Singmin, A Jansen, M C Vogel
Soft rot in heartwood of preservative-treated pole stubs of Eucalyptus cypellocarpa L. Johnson
1983 - IRG/WP 1204
Pole stubs of Eucalyptus cypellocarpa L. Johnson, treated in the sapwood with certain waterborne preservatives and exposed for 21 to 23 years in a dry tropical region were severely soft-rotted in the heartwood, as well as the sapwood. They broke with a brash fracture when stress tested (loaded as a cantilever) in the field. The severe soft rot in the heartwood was not detected by the knife test or...
J E Barnacle, G C Johnson, M A Tighe
Note and literature survey on the "Eucalyptus borer" Phoracantha semipunctata F. (Col.; Cerambycidae), a pest in between forest and wood
1984 - IRG/WP 1228
In the Eucalyptus-forests of Huelva, Spain, Phoracantha semipunctata appears as a severe forest-pest fatal to trees impaired by drought. The population snowballed in two and a half years, millions of larvae reduce the value of wood to "papermill-quality''. One of the intentions of the paper is to collect knowledge for help and cure. A literature survey forms the main part of the ...
S Cymorek
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
Boracol 40 - A potential remedial and preservative treatment for lyctids
1983 - IRG/WP 1192
The paper reports on a preliminary assessment of the efficacy of a diffusion formulation, Boracol 40, when applied as a brush treatment: to the surface of Eucalyptus obliqua against the powder-post borer Lyctus brunneus. After a five month bioassay, Boracol 40 has severely retarded the progress of active infestations of Lyctus brunneus and has been 100 per cent effective as a preventative treatmen...
J W Creffield, H Greaves, C D Howick
Termite Response to Oil-Heat-Treated Norway spruce, Scots Pine and Eucalyptus Wood
2006 - IRG/WP 06-20325
The work here presented focused on the behaviour of subterranean termites (Reticulitermes grassei Clément) towards Oil-Heat-Treated (OHT) Norway spruce (Picea abies L.), Scots pine (Pinus sylvestris L.) and eucalyptus (Eucalyptus globulus Labill) wood, with a particular interest in the development of simple methods adequate to study the resistence of these materials to termite attack. Small test ...
L Nunes, T Nobre, C Welzbacher, A O Rapp
Lyctine susceptibility testing and dealing with rarely susceptible hardwood species
2007 - IRG/WP 07-10607
This study examined the lyctine susceptibility of 16 timber species or hybrids. Several of the timbers have been placed previously in a ‘rarely susceptible’ category, but for standards and compliance purposes, such in-between ratings are not acceptable. Timber specimens were spot tested for starch content, and exposed to three species of lyctine beetles in an insectary. New criteria were devel...
L J Cookson, J Carr, N Chew, J W Creffield
Influence of Grain Direction on Penetration, Retention, and Leaching of CCA(C) in Sapwood and Heartwood of Kenyan-Grown Eucalyptus saligna and Acacia mearnsii
2007 - IRG/WP 07-40383
Penetration, retention, and leaching of CCA (C) in relation to grain orientation were tested in small (50mm x 50mm x 200mm) sapwood and heartwood samples of Eucalyptus saligna and Acacia mearnsii. In both sapwood and heartwood of the two species, the results showed a consistent pattern: Transverse > Radial > Tangential. Whereas penetration, retention, and leaching were significantly high i...
R Venkatasamy
White Rot in Eucalyptus Wood: Anatomical Changes and Density Variation by X-Ray Densitometry
2007 - IRG/WP 07-10631
Wood samples of the hybrid Eucalyptus grandis x urophylla attacked by white rot fungi were characterized. Microscopically, the colonization of the fungi was observed in the vessels and radial parenchyma, however the cell walls of the some fibers were attacked, indicating susceptibility to this fungi. Zone lines were observed as a result of interaction and compartmentalization of the fungi. Microsc...
M Tomazello Fo, S Brazolin, M P Chagas
Natural durability of fast growth plantation Eucalyptus grandis Hill, ex Maiden
2008 - IRG/WP 08-10660
One of the fast growing species cultivated in Uruguay of mayor economical importance is Eucalyptus grandis. Physical and mechanical properties of juvenile and mature wood from different regions have been deeply studied. However, since no scientific data of natural durability of this specie has been reported, natural durability of E. grandis from two sites (Rivera and Rio Negro) was evaluated. Two ...
S Böthig, A Sánchez, J Doldán
Estudio comparativo entre postes de Eucalyptus saligna Smith, Pinus caribaea Morelet (pino macho) y Hormigón
2008 - IRG/WP 08-40436
As consequence of the Energy Revolution and the amplification of the communication networks, Cuba carries out significant expenditures of foreign currencies in the import of public service posts. It is presented in this work a synthesis of the current problem in Cuba of the public service posts (PSP), since as answer to the stocks of improvement of the national Electric System, the demand of this ...
C Sosa Suárez, I D Velázquez Viera, K Manzanares Ayala
Preservación de madera en Uruguay
2008 - IRG/WP 08-30492
Uruguay has a temperate climate and predominantly gently undulating landscape which is naturally suitable for farming activities. Therefore, its economy has always been based upon them and the related industries. In the sixties, the government decided it was necessary to increase forested areas in the country. Based on different consultancies, the legal frame was built in order to promote a sustai...
S Böthig
Study on the natural durability of Eucalyptus grandis wood from Argentina
2009 - IRG/WP 09-10689
In Argentina eucalypts are in second place of importance in planted area, after pines. Due to its high growth rates (from 35 to 55 m3/ha/yr), Eucalyptus grandis is the most important among the eucalypts planted in Argentina. Moreover, E. grandis is one of the species with the greatest potential in the country, because of its diversity of uses for high end and added value solid products. Due to the...
D Lorenzo, M T Troya, J C Piter, M Sánchez, C Baso
Bioactivity of Eucalyptus camaldulensis essential oil against Microcerotermes diversus (Isoptera: Termitidae)
2013 - IRG/WP 13-30631
Microcerotermes diversus Silvestri (Isoptera: Termitidae) is the most economically destructive wood pest in structures in Khuzestan province (Iran). Chemicals such as essential oils and plant extracts that are compatible with the environment and that have high potential to be used in integrated pest management programs are extremely important. This study evaluated the repellency, contact and diges...
B Habibpour, E Shafiei Alavijeh, A Rasekh
Durability of treated wood Corymbia torelliana and Eucalyptus grandis x Eucalyptus urophylla against subterranean termite
2015 - IRG/WP 15-20563
This work aimed to analyze the durability of woods against termite Nasutitermes corniger Motsch. Fence posts from this study were collected in Pinheiros, north of Espírito Santo state, Brazil. Used the Corymbia torelliana and Eucalyptus grandis x Eucalyptus urophylla species with 11 and 9 years, respectively and plant spacing of 3.00 x 2.00 m. Were used 72 samples from discs removed the 0.50 m of...
D Junior Verly Lopes, J Benigno Paes, P N de Medeiros Neto, G dos Santos Bobadilha
Buffered Amine Oxide Treatment Systems for Imparting Water Based Azoles/Insecticides in Douglas Fir and Eucalyptus
2015 - IRG/WP 15-40707
In today’s world, wood remains the most versatile, practical and sustainable building material. In contemporary countries, wood is a well-managed renewable resource that has a remarkably small carbon footprint compared to those of steel, aluminium, composites, and concrete. These alternative materials have continued to emerge as viable building materials given the durability issues of untreate...
R W Clawson Jr
Outcomes deal to impregnability of Eucalyptus globolus L. wood after microwave treatment
2015 - IRG/WP 15-40712
Microwave treatment of wood has been used with several aims in many studies as drying, enhancement of pulp properties, angle fibre detecting, density evaluation, etc., and also to improve permeability of wood. Eucalyptus globulus Labill. is a refractory species which is spreading its use as solid wood for construction in Spain. Studies of different ways to improve their impregnability (uptake and ...
A Vega, E Hermoso, M T Troya
Above-ground performance of a buffered amine oxide treatment system against Mastotermes darwiniensis
2016 - IRG/WP 16-10855
Above-ground H2 field tests against Mastotermes darwiniensis were conducted in far north Queensland to assess the efficacy of buffered amine oxide treatments in the softwoods Pinus sylvestris and P. radiata, and the hardwoods Eucalyptus regnans and E. diversicolor. Untreated hardwoods and slash pine bait wood (P. elliottii) were severely attacked or destroyed, while untreated P. sylvestris was mod...
L J Cookson, R W Clawson Jr
Wood biodeterioration monitoring using molecular fluorescence
2016 - IRG/WP 16-20589
Wood is an extremely complex and heterogeneous biological material, susceptible to biodeterioration by wood-destroying organisms. This process can be evaluated by natural resistance tests or non-destructive techniques, such as molecular fluorescence. The fluorescence of wood can be attributed to the presence of fluorophores groups or extractives, as a characteristic of some species. This study aim...
E Meneses Oliveira, A Florian da Costa, J W Batista Brag