Common Name:

General Information

Dipterocarpus costulatus is a large tree
The tree is a source of keruing timber and is commonly harvested from the wild for local use and also for trade.
The conservation status is based upon the rate of habitat loss. The plant is classified as 'Critically Endangered' in the IUCN Red List of Threatened Species(2013)[].

Known Hazards

None known

Botanical References

Range

Southeast Asia - Malaysia, Brunei.

Habitat

Local,in lowland forest on poor soils on flat and undulating land, rarely ascending to 600 metres[].

Properties

Conservation Status	Critically Endangered
Other Uses Rating
Habit	Tree
Height	0.00 m
Cultivation Status	Wild

Cultivation Details

Not known

Edible Uses

None known

Medicinal

None known

Other Uses

Although we have seen no specific information for this species, all members of this genus contain an oleo-resin in the trunk - though it is not always freely produced and is also not always of good quality[]. The oil is obtained by cutting a hole in the trunk near the base (about 90 - 150cm from the ground) and then dipping out the resin with a spoon as it collects there. To prolong the flow, a fire made from dead leaves or brushwood is made in the hole at intervals - this burns off the dried resinous film and allows the resin to flow again[, ].

The tree is a source of keruing timber[]. We have no specific information, but a general description of keruing timber is as follows:-
The heartwood is light red to red brown or purplish red brown; it is clearly demarcated from the 5 - 7cm wide band of sapwood. The texture is coarse; the grain straight or interlocked. The wood is moderately heavy to heavy; moderately hard; somewhat durable, being resistant to dry wood borers, fairly resistant to fungi but susceptible to termites. It seasons slowly, with a high risk of checking and distortion; once dry it is poorly stable to moderately stable in service. It has a high blunting effect on tools due to the presence of silica, stellite-tipped and tungsten carbide tools are recommended; some species are very resinous and can clog tools; there is occasional tearing on quartersawn wood; nailing and screwing are good, but require pre-boring; gluing is correct, but care is required because of the resin. A general construction timber, it is used in carpentry, panelling, joinery, floors, timber frame houses, boxes and crates, veneer etc[].

Propagation

Seed -

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