Your search resulted in 36 documents. Displaying 25 entries per page.
Field test evaluation of preservatives and treatment methods for fence posts
1985 - IRG/WP 3347
This work presents the field test results after fifteen years exposure of Eucalyptus saligna fence posts treated with six different preservatives and five treatment methods. All the combinations with oil-borne preservatives presented the best results and among the waterborne preservatives, the fence posts treated by immersion method were with the lowest performance in the field test.
G A C Lopez, E S Lepage
Performance of treated fence posts after 6 years in five test plots in the State of Sao Paulo - Brazil
1976 - IRG/WP 376
Fence posts treated with creosote, pentachlorophenol and creosote/ pentachlorophenol mixtures showed good performance after 6 years of exposure in five test plots located in the State of Sao Paulo - Brazil. Good results were also achieved with copper sulphate/sodium arsenate and copper sulphate/potassium dichromate mixtures. Fungi and termites were the main destroying agents found attacking the posts.
M S Cavalcante
Problems caused by termites in buildings in the State of Sao Paulo
1976 - IRG/WP 150
Termites are the main insects attacking buildings in the State of Sao Paulo - Brazil. Their attack occurs in wood and wooden materials as well as paper, textile, leather and so on.
M S Cavalcante
Effectiveness of "Gang-Nail" plates in preventing splitting of Eucalyptus poles and Brazilian hardwood sleepers
1984 - IRG/WP 3262
This paper presents the results of some tests carried out with an anti-splitting device, placed on the end surfaces of Eucalyptus spp utility poles and Brazilian hardwood sleepers at the beginning of an air-drying period. The type of device used, a "Gang-Nail" plate, reduces significantly the splits at the end-surface of poles, but reduces only a little the splits occurring in sleepers.
A M F Oliveira, J A C Sodré, O B Neto
Preservative treatment of Eucalyptus saligna fence posts by the double-diffusion method
1982 - IRG/WP 3196
Eucalyptus saligna fence posts treated by the double-diffusion method with two chemical combinations showed average lives of 11.2 years (copper sulphate and potassium dichromate at 10.5 kg/m³ retention)and of 14.3 years (copper sulphate and sodium mono-H arsenate at 7.1 kg/m³ retention), as determined in five test sites in the State of Sao Paulo, Brazil. The exponential model was the best fit when expressing average life by the Decay Index (DI) as a function of time.
E S Lepage, A R De Freitas
The susceptibility of 35 Amazon wood species to Cryptotermes brevis (Walker)
1982 - IRG/WP 1160
Laboratory tests were carried to evaluate the susceptibility of 35 Amazon hardwoods to Cryptotermes brevis (Walker). The results were analysed statistically and showed that five wood species were non resistant, nine were resistant and the other twenty-one in between those classes of resistance.
M D Canedo
Evaluation of the effectiveness of three microbiocides in the control of sapstains
1982 - IRG/WP 3212
Results of field test on the effectiveness of BUSAN 30, CAPTAN, FOLPET against mould and sapstain in Pinus elliottii are presented. The viability of use of FOLPET in Brazil as an alternative to sodium pentachlorophenate is also discussed.
S Milano, J A A Vianna Neto
Production of treated wood in Brazil in 1982 and 1983
1985 - IRG/WP 3327
The data of Brazilian production of treated sleepers, poles, crossarms, fence posts and other commodities are given for the years of 1982 and 1983. This report updates information given to the Group in Document No: IRG/WP/3321 Wood Preservation in Brazil, STU information no 445
M S Cavalcante
Development of marine borers research in Sao Paulo State, Brazil
1985 - IRG/WP 4117
This paper describes some field tests which have been carried on marine sites in Sao Paulo State mainly to investigate the natural resistance of Brazilian woods and the occurrence of marine borers. Some laboratory breeding tests which are being developed are also describe
G A C Lopez
Wood-attacking organisms in Brazil
1982 - IRG/WP 1168
Lists of the main wood-attacking beetles, termites, fungi and marine borers in Brazil are presented with the respective wood species from which they were collected.
M S Cavalcante
The effect of sapwood on the rate of deterioration of fence posts
1986 - IRG/WP 1277
In order to evaluate the effect of the presence of sapwood on the rate of deterioration of fence posts, 30 specimens with and without sapwood of Eucalyptus citriodora, Eucalyptus paniculata, Eucalyptus saligna and Eucalyptus tereticornis were exposed in three test sites in the State of São Paulo, Brazil. The results of the inspection carried out in 1985, after 5 years of exposure, are reported in the present paper.
M S Cavalcante, G A C Lopez, E S F Mucci, R G Montagna
Natural durability and basic physical and mechanical properties of secondary commercially less accepted wood species from Brazil
2002 - IRG/WP 02-10451
The natural durability towards basidiomycete fungi and termites of several secondary timber from Brazil (Vatairea sp., Hymenolobium sp., Inga sp., Manilkara sp., Caryocar sp., Terminalia sp., Apuleia sp.) has been evaluated according to the EN 350-1. Some basic physical and mechanical properties (density, shrinkage, hardness, colour, static strength in flexion and compression) were also measured according to the appropriate standards. The results given in this paper could help in promoting the utilization of these timbers for certain end-uses.
M-F Thévenon, A Thibaut
Lignocellulotitic Hymenomycetes from native forest and Pinus elliottii Engelm in the Fontes do Ipiranga State Park, São Paulo, Brazil
1991 - IRG/WP 1468
Results show a distinct microflora for each forest type. A total of 9 families, 45 genera and 67 species were distributed among the two forest ecosystems were studied. Antrodiella, Auricularia, Grammothele, Steccherinum, Stereum and Trametes were found only in the native forest, where Antrodiella hydrophila (Berk. & Curt.) Ryv., Grammothele sp, Phellinus gilvus (Schw.) Pat., Rigidoporus microporus (Fr.) Overeem, Schizopora flavipora (Cke.) Ryv. and Trametes versicolor (Fr.) Pilat. were the most frequent species. Logs associated with Dentipellis dissita (Berk. & Cke.) Mass., Hydnochaete badia Bres., Lentinus calyx (Speg.) Pegler, Lentinus nigroosseus Pilat., Phellinus gilvus (Schw.) Pat., Rigidoporus lineatus (Pers.) Ryv., Steccherinum reniforme (Berk. & Curt.) Banker., Tomentella pallida (Rick) Penteado, Trametes versicolor (Fr.) Pilat., showed rapid decay during the sampling period. The Pinus elliottii plantation demonstrated specificity for Cladoderris dendritica Pers., Skvortzovia furfurella (Bres.) Bononi & Hjortst. The majority of the logs in this type of forest yielded Scytinostroma basidiocarps. Cladoderris and Scytinostroma formed basidiocarps over the entire log. Logs with Hypochnicium punctulatum (Cke.) Erikss., H. Sphaerosporum (Hohn. & Litsch.) Erikss., Scytinostroma aff. galactinum (Fr.) Donk, Scytinostroma sp1, Scytinostroma sp2, Skvortzovia furfurella (Bres.) Bononi & Hjortst., Trechispora cohaereuns (Schw.) Julich. & Stalp., and Trechispora sp had apparently a higher rate of decay than others. Antrodiella hydrophila (Berk. & Curt.) Ryv., Hypochnicium sphaerosporum (Hohn. & Litch.) Erikss., Hymenochaete aff. dura (Berk. & Curt.), Lentinus calyx (Speg.) Pegler, Pachykytospora alabamae (Berg. & Cke.) Ryv., Porodisculus pendulus (Schw.) Murr., Schizopora flavipora (Cke.) Ryv., Scytinostroma aff. galactinum (Fr.) Donk and Trechispora cohaereuns (Schw.) Julich & Stalp., are reported for the first time in Brazil.
M Aparecida de Jesus
New developments in wood preservation
1974 - IRG/WP 335
Most of the developments in wood preservation in recent years have been stimulated by changing circumstances, particularly the increasing interest in reducing hazards and environmental, pollution but also the serious difficulties that are now being encountered in obtaining economic supplies of established preservatives. There is perhaps a danger that new controls to reduce pollution dangers may be too severe.
B A Richardson
Natural durability of wood in ground contact - A correlation between field and laboratory tests
1985 - IRG/WP 2182
A field test is being carried out to evaluate the natural durability of 20 hardwoods. The resistance to decay and termite attack was evaluated in accelerated laboratory tests. The results of the field test after 6 years and 8 months indicate that there is not necessarily agreement between results from laboratory and field tests. It is pointed out that apart from the artificiality of the laboratory tests, a possible cause of the discrepancies can be the different performance of the same wood species in different test sites.
M S Cavalcante, G A C Lopez, R G Montagna, M E S Fosco Mucci
Some statistics on the Brazilian Wood Preservation Industry: 1980-81
1982 - IRG/WP 3214
Statistical data on the production of pressure treated wood and on the consumption of wood preservatives are given for the years of 1980 and 1981 in Brazil.
M S Cavalcante, F C Geraldo, A R De Freitas
A field test with Benzotar, an industrial residue, as a wood preservative
1985 - IRG/WP 3349
Benzotar, a residue of production of benzoic acid, was tested in field as a wood preservative. Results, after 6.5 years of exposure, showed that this product presents properties that improve the performance of wood in ground contact. This paper describes these results and presents a discussion an some aspects of its potential utilization in Brazil.
S Milano, L R Silva
The most important wood-destroying insects in various countries (Results of questionnaire)
1981 - IRG/WP 1136
Performance of CCA treated Eucalyptus round ties
1985 - IRG/WP 3342
After 5.5 years of field exposure in the south of Brazil round Eucalyptus ties treated with CCA type A Oxide (OSMOSE K-33-A) preservative with retentions from 12 to 14 kg/m³ (0.75 to 0.873 PCF) (active ingredient basis) are performing very well. No decay or insect attack was observed in the 100 ties in test in real conditions of use; 10% of ties show incipient checking (what is a natural trend of Eucalyptus ties) and 3% show weaking of the nails.
V J Carlos, F R Niederauer, J P P Wehr
Influence of abiotic factors on the production of Basidiocarps by lignocellulolitic Hymenomycetes from native forest and plantations of Pinus elliottii Engelm in the Fontes do Ipiranga State Park, São Paulo, Brazil
1991 - IRG/WP 1469
A report on the influence of abiotic factors on the production of basidiocarps by lignocellulotic Hymenomycetes of native forest and Pinus elliottii. It was concluded that the climatic conditions (temperature, humidity, microhabitat) and the decay stage of the logs affected the production of basidiocarps by Hymenomycetes.
M Aparecida de Jesus
Damage by wood-attacking insects in buildings in Sao Paulo State - Brazil. (including errata slip)
1978 - IRG/WP 175
From 1974 to 1978 up to 602 buildings attacked by wood-boring insects were inspected by Instituto de Pesquisas Tecnologicas in Sao Paulo State - Brazil. Damage was caused mainly by subterranean termites, dry-wood termites and wood-attacking beetles. Up to US $ 1000,000 is the amount needed to control such insects in the buildings inspected
A T De Lelis
Production of treated wood in Brazil in 1984
1986 - IRG/WP 3357
The data of the Brazilian production of sleepers, poles, crossarms, fence posts and other commodities are given for the year of 1984.
M S Cavalcante
Contribution to the knowledge of wood-rotting fungi in Brazil. Part 1: Occurrence and distribution of fungi on different substrates from the Manaus region, Amazonas State
1995 - IRG/WP 95-10096
A total of 945 spezimens of fungi were studied with regard to their distribution on ditterent substrates, abundances and economic importance. The samples came from the collection ot the Wood Pathology Laboratory of CPPF/INPA in Manaus, Brazil. Altogether, 163 spezies and 87 genera were identified. The following genera Trametes, Auricularia, Panus, Rigidoporus and Hymenochaete were represently by more than 5 species. Auricularia delicata ((Hook.) Underw., Auricularia fuscosuccinea (Mont.) Farl., Coriolopsis occidentalis (Klotz.) Culln., Favolus brasiliensis Fr., Fomes faciatus (Sw.: Fr.) Cke., Hexagona hydnoides (Fr.) K. Fidalgo, Panus rudis Fr., Phellinus gilvus (Schw.) Pat., Pleurotus spp, Rigidoporus lineatus (Pers.) Ryv., Schizophyllum commune Fr. and Schizopora carneo-lutea (Rodw. & Clel.) Kotl. & Pouz., were found on all stubstrates. Kretzschmaria clavus Fr. Sacc., Pachykytospora alabamae (Berk. & Cke.) Ryv., Polyporus infernalis Berk., Stereum fasciatus Schw., and Xylaria telfairii (Berk.) Fr., occurred on naturally fallen trees. The well known parasites as Grammothele fuligo (Berk. & Br.) Ryv., Hypoderma capitatum Erikss. & Hjorst., Phellinus robiniae Murr., Rigidoporus microporus (Fr.) Overeem and Schizopora carneo-lutea were found on several substrates. The most common species was collected on naturally fallen trees and cut logs.
M Aparecida de Jesus
Durability of exterior natural wood finishes in Brazil
1985 - IRG/WP 3343
Wood finishes systems were evaluated in natural weathering conditions during 5 (five) years, over "Parana-pine" (Araucaria angustifolia). Test samples results show that: - Semitransparent wood preservative stains, based on polimerized linseed oil, provided very good protection to the wood, compared with the one based on alkyd varnish; - Solid color wood preservative stains provided good durability. However, film degrading process was identical to the one of conventional finishes; - Conventional paint and varnish showed decomposition caused by cracking, checking and flaking (scaling).
D R Macedo
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 dithiocarbamate plus ethylenediamine plus disodium cyanodithioymide-carbonate showed good effectiveness against sap stain fungi but failed to prevent mold growth.