The tree is widely exploited for its very valuable timber, which is traded internationally, and plantations have been established in several countries. A high. Identity. Top of page. Preferred Scientific Name. Khaya ivorensis A. Chev. Preferred Common Name. African mahogany. International Common. Khaya ivorensis is distributed from Côte d’Ivoire east to Cameroon and south to Cabinda (Angola); it possibly also occurs in Guinea, Liberia.
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Trees of 30 years old may produce fruits and seeds abundantly. Traditionally, the wood is used for dugout canoes. The proportion of Khaya ivorensis in these amounts is obscure. Young trees have a slender stem and a small crown. Khaya ivorensis is considered one of the most important timber species for plantations, combining fast growth and good timber quality. It grows many white flowers at the end of its branches. The seeds are best sown in seed beds in ivorensix nursery.
In the nursery, light shade is advantageous for seedlings up to 2 khayq old; this reduces attacks by Hypsipyla shoot borers and the development of leaf galls. The bitter-tasting bark is widely used in traditional medicine.
In Brazil Khaya ivorensis is used for reforestation because of its resistance to Hypsipyla grandellathe major pest of Brazilian mahogany. The sapwood is often removed soon after felling to prevent attacks by ambrosia beetles.
The heartwood is pale pinkish brown to pale red, darkening ivornesis deep brown with a golden lustre upon exposure. It is threatened by habitat loss. It does not have many demands to survive because it can tolerate some shade and short periods of flood during rainy seasons.
There appears to be a more or less gradual transition in species according to ecological gradients, from the moist evergreen forest zone through semi-deciduous forest to the savanna zone. kuaya
Logs may have a spongy or brittle heart, and care is needed in felling and sawing operations. The high buttresses at the base of the bole often necessitate the construction of a platform before felling can take place, or the removal of the buttresses before felling to recover more timber. It grows to be about 40—50 m high. In mixed plantations the average bole diameter was 39 cm at 27 years after planting, with dominant trees being 28 m tall and 47 cm in diameter. The integration of Khaya ivorensis in agroforestry systems, as is already the case in cocoa based systems in Nigeria, can be considered economically and technically feasible and an ecologically ivogensis strategy.
Khaya ivorensis – Wikipedia
Views Read View source View history. Limonoids have been isolated from the bark and seeds. It grows in groups or singly. Once dry, the wood is fairly stable in service. Smoke from the wood showed good results in tests of smoking fish, protecting the fish effectively against fungi. More extensive establishment of plantations of Khaya ivorensis is certainly desirable in tropical Africa, but Hypsipyla attack is a serious drawback.
Plant Resources of Tropical Africa Introduction. Its woody fruit is slightly thinner than those of Khaya grandfoliola. It is fairly widely grown in plantations within its natural area of distribution, but also in tropical Asia and tropical America. Some of these showed significant antifeedant activity in insects, and some antifungal and antibacterial activities.
Root pulp is applied as an enema to treat dysentery. It has been proposed for inclusion in CITES appendix I or II, but it has not been listed due to insufficient information on regeneration, extent of plantations and sustainability under current management regimes. Extensive biosystematic studies on Khaya are recommended, covering the whole range of the genus and also considering the ecological requirements.
The wood of makore Tieghemella is similar, but more durable. Khaya ivorensis is a species in the African mahogany family.
Regeneration of Khaya ivorensis is not promoted by large disturbances in the forest, but it benefits from small gaps. The monoaxial state may persist to a height of 10 m. Ground young shoots and leaves are applied externally as an anodyne.
This may be partly due to some genetic resistance against Hypsipyla robusta attack. Navigation menu Personal tools Log in Request account.
Provenance trials in Ghana showed a fairly high heritability for height growth, with the growth of the highest-ranking progenies being nearly twice that of the lowest-ranking ones. It generally air dries and kiln dries easily with little degrade, but some warping may occur due to the presence of interlocked grain.
Seedlings are planted out when 60—90 cm tall, usually as stumps or striplings. Accessed 13 November This page was last modified on 20 Decemberat The application of 0. The combined effects of selection of provenances with genetic resistance and mhaya silvicultural practices could have a substantial positive impact on the damage caused by Hypsipyla robusta stem borers. The rates of shrinkage are moderate, from green to oven dry 2.