Forest Products from Latin America. Annotated Bibliography of ...

Chudnoff, M.; Goytia, E. 1967. The effect of incising
on drying, treatability, and bending strength of posts. Res.
Pap. ITF-5. U.S. Department of Agriculture, Forest Service,
Institute of Tropical Forestry.
A commercially feasible post incising machine is described
and was used to prepare test material to determine the effect
of incisions on: (1) air drying time, (2) preservative
absorption and penetration, and (3) bending strength of
small diameter posts. Incising had no significant effect on
air drying time but resulted in significant improvement in
the treatability of the 20 species evaluated. Incising does
result in a 15 to 25 percent reduction in bending strength
but this loss is tolerable compared to benefits gained by
preservative enrichment of the vulnerable groundlines.
Chudnoff, M.; Goytia, E. 1971. Treatability of Puerto
Rican woods. Res. Pap. ITF-11. U.S. Department of
Agriculture, Forest Service, Institute of Tropical Forestry.
A simple but highly sensitive wafer assay was used to classify
the treatability of the more common woods of Puerto
Rico and the Virgin Islands. Sapwood only was treated.
Oil absorption of coated and uncoated wafers can be related
to the absorption of nonincised and incised posts
treated in a hot- and cold-bath system. For nonincised
posts only 6 out of the 53 species evaluated were predicted
to obtain an adequate treatment (6-12 lb/ft3 ). If incised,
32 species would have an acceptable retention. Similar results
may be anticipated for water-borne preserving salts.
Chudnoff, M.; Goytia, E. 1972. Preservative treat-
ments and service life of fence posts in Puerto Rico (1972)
Progress Report). Res. Pap. ITF-12. U.S. Department of
Agriculture, Forest Service, Institute of Tropical Forestry.
Posts treated by four nonpressure techniques using five
wood preservation chemicals have been set out at four
test locations. About 6,700 treated and nontreated con-
trol posts representing some 70 species are under study.
This report describes materials and methods used, chemi-
cal retentions and penetrations obtained, and reviews the
condition of the posts up through the April 1972 inspec-
tion. Some installations date back to 1944, but most of the
test posts have been in service for 13 years or less. Ver-
tical cold-soaking and the hot- and cold-bath technique
are most effective and should be preferred over conven-
tional cold soaking or salt combinations applied by double
diffusion.
Chudnoff, M.; Maldonado, E.D. 1964. Preservative
treatments and service life of fence posts in Puerto Rico.
Res. Pap. ITF-1. U.S. Department of Agriculture, Forest
Service, Institute of Tropical Forestry.
Posts treated by four nonpressure techniques using five
wood preservation chemicals have been set out at four
test locations. About 6,000 treated and nontreated control
posts representing 68 species are under study. This report
describes materials and methods used, chemical retentions
and penetrations obtained, and reviews the condition of
the posts up through the September 1963 inspection. Some
installations date back to 1944, but most of the test posts
have been in service for only 3.5 to 4.5 years. Vertical cold-
soaking, the hot- and cold-bath technique, and double diffu-
sion salts applied by complete immersion are most effective
and should be preferred over conventional cold-soaking or
salt combinations applied by end diffusion.
Chudnoff, M.; Boone, R.S.; Goytia, E. 1967. Preser-
vative treatments and service life of fence posts in Puerto
Rico. Res. Pap. ITF-4. U.S. Department of Agriculture,
Forest Service, Institute of Tropical Forestry.
Posts treated by four nonpressure techniques using five
wood preservation chemicals have been set out at four
test locations. About 6,000 treated and nontreated con-
trol posts representing 70 species are under study. This
report describes materials and methods used, chemical re-
tentions and penetrations obtained, and reviews the con-
dition of the posts up through the April 1967 inspection.
Some installations date back to 1944, but most of the test
posts have been in service for 8 years or less. Vertical cold-
soaking, the hot- and cold-bath technique, and double diffu-
sion salts applied by complete immersion are most effective
and should be preferred over conventional cold-soaking or
salt combinations applied by end diffusion.
Chudnoff, M.; Gjovik, L. R.; Wawriw, R. 1973. Effectiveness
of groundline treatments of creosoted pine
poles under tropical exposure. Forest Products Journal.
23 (9): 80-84.
Reports on a trial after 5 years of exposure in Puerto Rico.
Results showed that preservation with creosote alone is in-
adequate under these conditions. The three proprietary
paste treatments tested were all highly effective in prevent-
ing decay (despite low retention of preservative in some
cases).
Chudnoff, M.; Eslyn, W.E.; Wawriw, R. 1978. Effectiveness
of groundline treatments of creosoted pine
poles under tropical exposure. Forest Products Journal.
28 (4):28-32.
The final report on a study in which poles of southern pine
were treated with creosote and stored outdoors for 8 years
before being treated with penta-gel, F-creosote paste, or
F-As injection and tested in contact with the ground in
Puerto Rico for 10 years. Freedom from decay and preser-
vative retention as measured by toxicity to Lentinus lep-
ideus in soil block tests increased in the order creosote,
penta-gel, F-creosote, F-As injection. Results indicate that
creosote-treated poles require supplementary ground level
protection for tropical use; where decay is most likely, F-As
injections are recommended.
Clark, J.W. 1969. Natural decay resistance of 15 exotic
woods imported for exterior use. Res. Pap. 103. Madison,
WI: U.S. Department of Agriculture, Forest Service, Forest
Products Laboratory.
Conejos, J. 1969. Preservation characteristics of 127
woods of the Venezuelan Guayana (Caracteristicas de
preservacion de 127 maderas de la Guayana, Venezolana).
Merida, Venezuela: Laboratorio Nacional de Productos
Forest ales.
CTFT (Centre Technique Forestier Tropical). 1984.
Technical sheets on French Guyanan woods (Fiches techniques
sur des bois guyanais). Nogent-sur-Marne, France:
Bois et Forets des Tropiques. 204:53-72.
Descriptions of five species of tropical woods from French
Guyana, including information on the durability and treatability
of Ocotea rubra, Erisma unicinatum, Adnira coriacea,
Vouacapoua americana, Eperua falcata, E. grandiflora, and
E. rubiginosa.
De Groot, R.C. 1986. Durability of utility poles in
Panama. Res. Pap. FPL-RP-478. Madison, WI: U.S. De-
partment of Agriculture, Forest Service, Forest Products
Laboratory. 12 p.
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