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<center>'''COPAL'''</center>
MIWARANDUBA
DESCRIPTION AND USES
Sometimes described as an inferior balata, ma9aranduba is collected as a latex from trees of
the same genus as genuine balata (Manilkara).
Ma9aranduba, like sorva, has been used mainly for chewing gum manufacture, though in
slightly different formulations.
WORLD SUPPLY AND DEMAND TRENDS
Markets
With the development of synthetic gums for making chewing gum, the international market
for maçaranduba has declined sharply.
In the 1950s, recorded exports from Brazil, the major producer, were around
300-400 tormes/year; most of it went to the United States. More recent data (from the early
1980s onwards, including that shown in Table 37) are somewhat incomplete but indicate
exports of less than 10 tonnes/year for most years. Unofficial, trade sources indicate that the
level of exports in the early 1990s has been around 20-30 tonnes annually.
Levels of exports from other countries in the region, if any, are not known.
Use of natural gums by the Brazilian chewing gum industry is believed to be very small, and
no significant shift in this direction is anticipated which would offer prospects for substantial
increases in domestic consumption of maçaranduba.
Supply sources
Table 37 indicates a general decline in Brazilian production over the last decade or so, and
by 1990 it was only just over 100 tonnes. Data from earlier years suggest that production
peaked in 1965, at around 1 000 tonnes. Since 1982, all recorded production of maoranduba
in Brazil, like balata, has come from Pará state.
Production in other countries is not known but it is likely to be small.
Quality and prices
Magaranduba has a lower trans polyisoprene (gutta) content than genuine balata, about 25%,
and this accounts for its description as inferior balata. Its value (and price) is therefore
assumed to be lower than that of balata and this is borne out by Brazilian export values for
consignments shipped in the early 1980s: the unit value of balata was approximately 1.5-2.0
times that of maoranduba.
[138]
PLANT SOURCES
Botanical/common names
Family Sapotaceae:
Manilkara huberi (Ducke) Stand./Chev. Maoranduba
MORS and RIZZINI (1966) regard M. huberi as a synonym of M. elata (Fr. All.) Monac.
Description and distribution
M. huberi, which is generally considered to be the source of maoranduba, is a tall
Amazonian tree, up to 40 m or more in height.
COLLECTION/PRIMARY PROCESSING
Methods of collection of maçaranduba are the same as those described earlier for balata, and
primary processing is performed in the same way as for sorva and balata, with the latex being
turned into balls and blocks.
In Brazil, traders' perceptions of how the latex is collected in the forest differ (COPPEN et
al., 1994). Some believe that earlier, destructive methods of obtaining the latex have given
way to those involving tapping, while others explain that, unlike sorva and balata, which can
be tapped, maçaranduba is always obtained by first felling the tree. This may be related,
however, to the fact that the wood of M. huberi is very resistant to fungal attack and so
highly valued as a source of timber.
In Brazil, the final processing and export of maçaranduba, like sorva, is concentrated in the
hands of one or two Manaus-based companies. These companies notify traders based in small
river towns of their need for certain products. Such traders, in turn, finance extractivists for
a period of up to several months to search for the commodity in question. The costs of this
search, and of looking after the families whilst the men are away, are met by the middleman
as a partial advance payment for the commodity.
Yields
There is very little published information on yields from M. huberi. OLIVEIRA et al. (1992)
state that tapping is carried out at intervals of two years, yielding an annual equivalent of 1
kg of maçaranduba per tree.
VAL'UE-ADDED PROCESSING
As was indicated for balata, no value-added processing is believed to have ever been carried
out at source on maçaranduba.
PRODUCTS OTHER THAN LATEX
The fruits of M. huberi are edible and are sometimes found in local markets (in Belém, in
Brazil, for example).
[139]
As noted above, the timber is also highly valued. Macaranduba wood is very dense and
resistant to biodeterioration, and is used for making railway sleepers.
DEVELOPMENTAL POTENTIAL
The poor market prospects for maçaranduba and the low yields of latex obtained (at
infrequent intervals in its native state), mean that M. huberi has very little potential in
developmental terms. It is unlikely that any investment in research would lead to a more
favourable conclusion.
SELECTED BIBLIOGRAPHY
ALTMAN, R.F.A. (1955) [Analysis of magaranduba latex from Manilkara huberi] (in Portuguese).
Boletim Tecnico do Instituto Agro Norte, 31, 81-95.
COPPEN, J.J.W., GORDON, A. and GREEN, C.L. (1994) The developmental potential of selected
Amazonian non-wood forest products: an appraisal of opportunities and constraints. Paper presented
at the FAO Expert Consultation Meeting on Non-Wood Forest Products, Santiago, Chile, 4-8 July.
LESCURE, J.P. (1995) [Extractivism in Amazonia. Viability and Development] (in French). Final
Project Report. ORSTOM/INPA/Aarhus University.
LESCURE, J.P. and CASTRO, A. (1990) [Extractivism in central Amazonia. An outline of economic
and botanical aspects] (in French). Paper presented at UNESCO-IUFRO-FAO Workshop
"L'Aménagement et la Conservation de l'Ecosystème Forestier Tropical Humide", Cayenne, 10-19
May.
MORS, W.B. and RIZZINI, C.T. (1966) Latex-yielding plants. pp 1-12. In Useful Plants of Brazil.
San Francisco/London: Holden-Day.
OLIVEIRA, FA., MARQUES, L.C.T. and FERREIRA, C.A.P. (1992) [Non-Wood Products of the
National Forest of Tapajos, Santarem, Para, Brazil] (in Portuguese). Preliminary report
TCP/BRA/0154/FAO for IBAMA. 20 pp.
[140]
Table 37. Macaranduba: production and exports from Brazil, 1978 and 1986-92
(tonnes)
1978 1986 1987 1988 1989 1990 1991 1992
Production 451 376 298 192 127 116 na na
Exports na 3 - na na
Source: National statistics (taken from COPPEN et al. , 1994, and LESCURE, 1995)
[[Category:FAO, NWFT 6]]