Delonix regia is a species of flowering plant in the family Fabaceae, subfamily Caesalpinioideae. It is noted for its fern-like leaves and flamboyant display of flowers. In many tropical parts of the world it is grown as an ornamental tree and in English it is given the name Royal Poinciana orFlamboyant. It is also one of several trees known as Flame tree.
In India it is known as Gulmohar (Hindi and Urdu -‘Gul’ means ‘Flower’ and ‘Mohr’ is 'Peacock', thus the name suggests a spectacular show of color, like the extraordinary colors of a peacock's tail[1]). It is also known there as Krishnachura (Bengali: 'crown of the Lord Krishna). In Vietnamese it is known as Phượng vĩ (means "Phoenix's Tail) (Vietnamese), Malinche, and Tabachine.[2] In Guatemala, Antigua Guatemala, it is known as "Llama del Bosque".
This species was previously placed in the genus Poinciana, named for Phillippe de Longvilliers de Poincy, the 17th century governor of Saint Christophe (Saint Kitts), who is credited with introducing the plant to the Americas. Because it is a legume, the tree has nitrogen-fixating and soil-improving properties.(http://en.wikipedia.org/wiki/Delonix_regia)
Current name: Delonix regia
Authority: (Hook.) Raf.
Family: Fabaceae - Caesalpinioideae
Synonym(s)
Poinciana regia Boj. ex Hook.
Common names
(Amharic) : dire dawa zaf
(Arabic) : goldmore
(Bengali) : chura, radha
(Burmese) : seinban
(Creole) : poinciana royal
(English) : flamboyant, flamboyant flame tree, flame of the forest, flame tree, gold mohur, gul mohr, julu tree, peacock flower, royal poinciana
(French) : flamboyant, poinciana, royal
(Hindi) : gulmohr
(Spanish) : Acacia roja, clavellino, flamboyán, flor de pavo, framboyán, guacamaya, josefina, Morazán, poinciana
(Swahili) : mjohoro, mkakaya
(Tamil) : mayarum, mayirkonrai, panjadi, telugu
(Thai) : hang nok yung farang
(Vietnamese) : phuong
(Yoruba) : sekeseke
Botanic description
Delonix regia is a tree 10-15 (max. 18) m high, attaining a girth of up to 2 m; trunk large, buttressed and angled towards the base; bark smooth, greyish-brown, sometimes slightly cracked and with many dots (lenticels); inner bark light brown; crown umbrella shaped, spreading with the long, nearly horizontal branches forming a diameter that is wider than the tree’s height; twigs stout, greenish, finely hairy when young, becoming brown. Roots shallow. Leaves biparipinnate, alternate, light green, feathery, 20-60 cm long; 10-25 pairs of pinnae, 5-12 cm long, each bearing 12-40 pairs of small oblong-obtuse leaflets that are about 0.5-2 cm long and 0.3 cm wide; petiole stout. The numerous leaflets are stalkless, rounded at the base and apex, entire thin, very minutely hairy on both sides, green on the upper surface. At the base of the leaf stalk, there are 2 compressed stipules that have long, narrow, comblike teeth. Corymbs 15-30 cm long, borne laterally near the end of the twig, each with loosely arranged, slightly fragrant flowers; flowers 5-13 cm across, with 5 equal petals, on slender stalks 5-7.6 cm long. Petals 5-6.5 cm long, 2-3 cm wide, orbicular, broadly spoon shaped, rounded but broader than long, slightly wavy-margined or crisp, tapering into claws about 2.5 cm long, widely extended and bending backwards before falling. Petals 4, orange-red, almost scarlet, 1 longer and narrower than the others, whitish inside with red spots and streaks; stalk very long, slender and hairy. Sepals 5, thick, green outside and reddish with yellow border within, reflexed when the flowers open, pointed, finely hairy, about 2.5 cm long. Stamens 5 with 10 red filaments; pistil has a hairy 1-celled ovary about 1.3 cm long and slender style about 3 cm long. Fruit green and flaccid when young, turning to dark brown, hard, woody pods, 30-75 cm long, 3.8 cm thick, 5-7.6 cm broad, ending in a short beak when mature, with many horizontally partitioned seed chambers inside, indehiscent, finally splitting into 2 parts. The conspicuous pods hang down and remain attached most of the year even when the trees are leafless. Seeds 30-45, hard, greyish, glossy, to 2 cm long, oblong and shaped very much like date seeds, transversely mottled with a bony testa. They are arranged at right angles to the length of the pod. The generic name, ‘Delonix’, is derived from a Greek delos (visible), and onyx (claw), in allusion to the conspicuously clawed petals. The specific name, ‘regia’, is from the Latin word ‘regis’ (royal, regal, magnificent). Most of its common names are derived from its large, flame-red flowers.
The tree is native to Madagascar and has been widely planted for the last 150 years or more as a garden and avenue tree in both dry and moist regions of tropical India as far as Jammu in the northwest. It is also one of the most extensively planted ornamental trees in tropical and subtropical regions throughout the world. In Sri Lanka, the tree is grown as an ornamental; it has been tried in Cyprus, but it could not stand the winter cold. Trials carried out in Ghana failed, but in addition to India, it has been grown successfully in Burma, Jamaica, Nigeria, Borneo, South Africa, Egypt, Tanzania and Uganda. It is also been planted in southern Florida including Florida Keys, southern California, Bermuda, Mexico, Brazil and throughout the West Indies.
Natural Habitat
D. regia originates from Madagascar, where it is now almost extinct. It is now widespread in most tropical and subtropical areas of the world. Trees can grow at higher altitudes than recommended, but flowering becomes erratic. The tree demands light and grows weakly and sparsely under shade. It grows in areas with both high and scanty rainfall. D. regia has a superficial root system and competes successfully with the neighbouring shrubs and flowering plants, rendering bare the ground under its canopy. It should therefore be planted away from other plants in the gardens. Trees are deciduous only where the dry season is long and pronounced.
Geographic distribution
Native : Madagascar, Zambia
Exotic : Brazil, Burkina Faso, Cyprus, Egypt, Eritrea, Ethiopia, India, Jamaica, Kenya, Mexico, Niger, Nigeria, Puerto Rico, Singapore, South Africa, Sri Lanka, Sudan, Tanzania, Uganda, United States of America
Biophysical limits
Altitude: 0-2000 m, Mean annual rainfall: Over 700 mm, Mean annual temperature: 14-26 deg C. Soil type: The species seems to tolerate many types of soils from clay to sandy, but it prefers sandy soils.
Reproductive Biology
D. regia starts flowering in its 4th or 5th years. In Egypt, flowers appear in April with the 1st leaves and last for several months. In India, the tree remains leafless from March to May, the new leaves appearing at the end of the hot season in May or June. In moist places, the tree begins to develop young foliage before the flowering season and does not flower prolifically. It also flowers less prolifically on the shady sites than on the sunny sites. Planting of trees on dry sites therefore promotes copious flowering. In regions with heavy rainfall, every tree seems to follow its own rhythm of shedding of leaves and flowering. Pods of the previous year keep hanging until they are dropped by wind currents, where they rot on the ground, releasing the seeds. Flowers are bisexual.
D. regia is easily propagated from seeds that have a hard, woody testa and take a long time to germinate. They may lie for 2-3 years in the soil without germinating and usually take 12-349 days to germinate. To break this dormancy, pretreatment is practised; a small portion of the seed coat is clipped, or seeds are boiled in hot water, then allowed to soak for 24 hours. After seeds are sown in unshaded nursery beds, they germinate within 5-10 days, with a germination rate of up to 90%; subsequent growth in the nursery is quite fast. Alternatively, the seeds can be directly sown in polythene bags, 4-5 seeds/bag. Seedlings watered and weeded regularly are planted out in the rainy season, with total time required in the nursery being 3-5 months. Keeping the plants for more than 9 months is not desirable, as they become too tall to handle, but seedlings can be transplanted even when 20-25 cm high. Trees can also be propagated from branch cuttings. Natural regeneration is common. Young plants are not fire resistant and should be protected from grazing.
Tree Management
D. regia can be planted in areas where rainfall is less than the recommended amount, as long as irrigation is practised. It is fast growing, and pollarding is a suitable practice. Careful pruning will achieve good crown form. The trees have shallow root systems and the wood is weak; they are therefore liable to being uprooted during strong storms and broken by strong winds. After the leaves are shed, the trees are less attractive, with their conspicuous pods remaining on the bare branches and with prominent tunnels and nests of termites that commonly attacks this species. Another objectionable feature is the surface root system, which sometimes breaks sidewalks and walls. Because of these undesirable characteristics, some authorities classify flamboyant as a tree that should not be planted.
Germplasm Management
Seeds can be stored for a long time if insect attack is avoided, which can be done by adding ash to the seeds. Seed storage behaviour is orthodox and a germination rate of 47% has been recorded after 9 years of storage at room temperature; no loss in viability following 4 years of storage. Viability is maintained following 3 years of hermetic storage at room temperature with 13-12% mc, and for at least 5 years in hermetic storage at room temperature. Average moisture of seeds is 10.45%, and there are about 2000-3245 seeds/kg.
Apiculture: Flowers are reputed to produce bee forage. Fuel: The large pods as well as the wood are used for fuel. Timber: The sapwood is light yellow, and the heartwood is yellowish to light brown. It is soft, heavy (specific gravity 0.8), coarse grained, weak, brittle, takes good polish and is rather resistant to moisture and insects although very susceptible to attack by dry-wood termites. Gum or resin: The tree yields a thick mucilage of water-soluble of gum in yellowish or reddish-brown warty tears; the seeds contain gum that may find use in textile and food industries. Medicine: Bark has medicinal properties. Other products: The hard, elongated seeds are occasionally used as beads.
Services
Shade or shelter: D. regia is planted as a shade tree in dairy farms, tea plantations and compounds. Ornamental: It is mainly valued as a decorative tree, often being planted in avenues and gardens. Boundary or barrier or support: D. regia can be planted as live fence posts.
Pests and diseases
Beetles and larvae of Poecilips sierralemensis bore into the pods to release the seeds. Trees are susceptible to attack by shoot borers and are occasionally defoliated by a caterpillar or an insect; leaves may be eliminated completely. D. regia is attacked by Ganoderma lucidum root rot, especially in the high rainfall areas.
Bein E. 1996. Useful trees and shrubs in Eritrea. Regional Soil Conservation Unit (RSCU), Nairobi, Kenya.
Bekele-Tesemma A, Birnie A, Tengnas B. 1993. Useful trees and shrubs for Ethiopia. Regional Soil Conservation Unit (RSCU), Swedish International Development Authority (SIDA).
Birnie A. 1997. What tree is that? A beginner's guide to 40 trees in Kenya. Jacaranda designs Ltd.
El Hadidi MN, Boulos L. 1988. The trees of Egypt. The American University in Cairo Press. 113, Sharia Kasr el Aini.
Hong TD, Linington S, Ellis RH. 1996. Seed storage behaviour: a compendium. Handbooks for Genebanks: No. 4. IPGRI.
ICRAF. 1992. A selection of useful trees and shrubs for Kenya: Notes on their identification, propagation and management for use by farming and pastoral communities. ICRAF.
Katende AB et al. 1995. Useful trees and shrubs for Uganda. Identification, Propagation and Management for Agricultural and Pastoral Communities. Regional Soil Conservation Unit (RSCU), Swedish International Development Authority (SIDA).
Keay RW. 1989. Trees of Nigeria. Claredon Press Oxford.
Lanzara P and Pizetti M. 1978. Simon & Schuster’s guide to trees. Simon & Schuster, Inc., New York.
Little EL, Wadsworth FH. 1964. Common trees of Puerto Rico and the Virgin Islands. Agricultural Handbook. No. 249. US Department of Agriculture. Washington DC.
Luna RK. 1996. Plantation trees. International Book Distributors, Dehra Dun, India.
Mbuya LP et al. 1994. Useful trees and shrubs for Tanzania: Identification, Propagation and Management for Agricultural and Pastoral Communities. Regional Soil Conservation Unit (RSCU), Swedish International Development Authority (SIDA).
Noad T, Birnie A. 1989. Trees of Kenya. General Printers, Nairobi.
Storrs AEG. 1995. Know your trees: some common trees found in Zambia. Regional Soil Conservation Unit (RSCU).
Streets RJ. 1962. Exotic forest trees of the British Commonwealth. Claredon Press, Oxford.
Vogt K. 1995. A field guide to the identification, propagation and uses of common trees and shrubs of dryland Sudan. SOS Sahel International (UK).
Williams R.O & OBE. 1949. The useful and ornamental plants in Zanzibar and Pemba. Zanzibar Protectorate.
(://www.worldagroforestrycentre.org)
(http://www.opete.info)Species identity
TaxonomySynonym(s)
Common names
(Amharic) : dire dawa zaf
(Arabic) : goldmore
(Bengali) : chura, radha
(Burmese) : seinban
(Creole) : poinciana royal
(English) : flamboyant, flamboyant flame tree, flame of the forest, flame tree, gold mohur, gul mohr, julu tree, peacock flower, royal poinciana
(French) : flamboyant, poinciana, royal
(Hindi) : gulmohr
(Spanish) : Acacia roja, clavellino, flamboyán, flor de pavo, framboyán, guacamaya, josefina, Morazán, poinciana
(Swahili) : mjohoro, mkakaya
(Tamil) : mayarum, mayirkonrai, panjadi, telugu
(Thai) : hang nok yung farang
(Vietnamese) : phuong
(Yoruba) : sekeseke
Botanic description
Delonix regia is a tree 10-15 (max. 18) m high, attaining a girth of up to 2 m; trunk large, buttressed and angled towards the base; bark smooth, greyish-brown, sometimes slightly cracked and with many dots (lenticels); inner bark light brown; crown umbrella shaped, spreading with the long, nearly horizontal branches forming a diameter that is wider than the tree’s height; twigs stout, greenish, finely hairy when young, becoming brown. Roots shallow. Leaves biparipinnate, alternate, light green, feathery, 20-60 cm long; 10-25 pairs of pinnae, 5-12 cm long, each bearing 12-40 pairs of small oblong-obtuse leaflets that are about 0.5-2 cm long and 0.3 cm wide; petiole stout. The numerous leaflets are stalkless, rounded at the base and apex, entire thin, very minutely hairy on both sides, green on the upper surface. At the base of the leaf stalk, there are 2 compressed stipules that have long, narrow, comblike teeth. Corymbs 15-30 cm long, borne laterally near the end of the twig, each with loosely arranged, slightly fragrant flowers; flowers 5-13 cm across, with 5 equal petals, on slender stalks 5-7.6 cm long. Petals 5-6.5 cm long, 2-3 cm wide, orbicular, broadly spoon shaped, rounded but broader than long, slightly wavy-margined or crisp, tapering into claws about 2.5 cm long, widely extended and bending backwards before falling. Petals 4, orange-red, almost scarlet, 1 longer and narrower than the others, whitish inside with red spots and streaks; stalk very long, slender and hairy. Sepals 5, thick, green outside and reddish with yellow border within, reflexed when the flowers open, pointed, finely hairy, about 2.5 cm long. Stamens 5 with 10 red filaments; pistil has a hairy 1-celled ovary about 1.3 cm long and slender style about 3 cm long. Fruit green and flaccid when young, turning to dark brown, hard, woody pods, 30-75 cm long, 3.8 cm thick, 5-7.6 cm broad, ending in a short beak when mature, with many horizontally partitioned seed chambers inside, indehiscent, finally splitting into 2 parts. The conspicuous pods hang down and remain attached most of the year even when the trees are leafless. Seeds 30-45, hard, greyish, glossy, to 2 cm long, oblong and shaped very much like date seeds, transversely mottled with a bony testa. They are arranged at right angles to the length of the pod. The generic name, ‘Delonix’, is derived from a Greek delos (visible), and onyx (claw), in allusion to the conspicuously clawed petals. The specific name, ‘regia’, is from the Latin word ‘regis’ (royal, regal, magnificent). Most of its common names are derived from its large, flame-red flowers.
Ecology and distribution
History of cultivationThe tree is native to Madagascar and has been widely planted for the last 150 years or more as a garden and avenue tree in both dry and moist regions of tropical India as far as Jammu in the northwest. It is also one of the most extensively planted ornamental trees in tropical and subtropical regions throughout the world. In Sri Lanka, the tree is grown as an ornamental; it has been tried in Cyprus, but it could not stand the winter cold. Trials carried out in Ghana failed, but in addition to India, it has been grown successfully in Burma, Jamaica, Nigeria, Borneo, South Africa, Egypt, Tanzania and Uganda. It is also been planted in southern Florida including Florida Keys, southern California, Bermuda, Mexico, Brazil and throughout the West Indies.
Natural Habitat
D. regia originates from Madagascar, where it is now almost extinct. It is now widespread in most tropical and subtropical areas of the world. Trees can grow at higher altitudes than recommended, but flowering becomes erratic. The tree demands light and grows weakly and sparsely under shade. It grows in areas with both high and scanty rainfall. D. regia has a superficial root system and competes successfully with the neighbouring shrubs and flowering plants, rendering bare the ground under its canopy. It should therefore be planted away from other plants in the gardens. Trees are deciduous only where the dry season is long and pronounced.
Geographic distribution
Native : Madagascar, Zambia
Exotic : Brazil, Burkina Faso, Cyprus, Egypt, Eritrea, Ethiopia, India, Jamaica, Kenya, Mexico, Niger, Nigeria, Puerto Rico, Singapore, South Africa, Sri Lanka, Sudan, Tanzania, Uganda, United States of America
Biophysical limits
Altitude: 0-2000 m, Mean annual rainfall: Over 700 mm, Mean annual temperature: 14-26 deg C. Soil type: The species seems to tolerate many types of soils from clay to sandy, but it prefers sandy soils.
Reproductive Biology
D. regia starts flowering in its 4th or 5th years. In Egypt, flowers appear in April with the 1st leaves and last for several months. In India, the tree remains leafless from March to May, the new leaves appearing at the end of the hot season in May or June. In moist places, the tree begins to develop young foliage before the flowering season and does not flower prolifically. It also flowers less prolifically on the shady sites than on the sunny sites. Planting of trees on dry sites therefore promotes copious flowering. In regions with heavy rainfall, every tree seems to follow its own rhythm of shedding of leaves and flowering. Pods of the previous year keep hanging until they are dropped by wind currents, where they rot on the ground, releasing the seeds. Flowers are bisexual.
Propagation and management
Propagation methodsD. regia is easily propagated from seeds that have a hard, woody testa and take a long time to germinate. They may lie for 2-3 years in the soil without germinating and usually take 12-349 days to germinate. To break this dormancy, pretreatment is practised; a small portion of the seed coat is clipped, or seeds are boiled in hot water, then allowed to soak for 24 hours. After seeds are sown in unshaded nursery beds, they germinate within 5-10 days, with a germination rate of up to 90%; subsequent growth in the nursery is quite fast. Alternatively, the seeds can be directly sown in polythene bags, 4-5 seeds/bag. Seedlings watered and weeded regularly are planted out in the rainy season, with total time required in the nursery being 3-5 months. Keeping the plants for more than 9 months is not desirable, as they become too tall to handle, but seedlings can be transplanted even when 20-25 cm high. Trees can also be propagated from branch cuttings. Natural regeneration is common. Young plants are not fire resistant and should be protected from grazing.
Tree Management
D. regia can be planted in areas where rainfall is less than the recommended amount, as long as irrigation is practised. It is fast growing, and pollarding is a suitable practice. Careful pruning will achieve good crown form. The trees have shallow root systems and the wood is weak; they are therefore liable to being uprooted during strong storms and broken by strong winds. After the leaves are shed, the trees are less attractive, with their conspicuous pods remaining on the bare branches and with prominent tunnels and nests of termites that commonly attacks this species. Another objectionable feature is the surface root system, which sometimes breaks sidewalks and walls. Because of these undesirable characteristics, some authorities classify flamboyant as a tree that should not be planted.
Germplasm Management
Seeds can be stored for a long time if insect attack is avoided, which can be done by adding ash to the seeds. Seed storage behaviour is orthodox and a germination rate of 47% has been recorded after 9 years of storage at room temperature; no loss in viability following 4 years of storage. Viability is maintained following 3 years of hermetic storage at room temperature with 13-12% mc, and for at least 5 years in hermetic storage at room temperature. Average moisture of seeds is 10.45%, and there are about 2000-3245 seeds/kg.
Functional uses
ProductsApiculture: Flowers are reputed to produce bee forage. Fuel: The large pods as well as the wood are used for fuel. Timber: The sapwood is light yellow, and the heartwood is yellowish to light brown. It is soft, heavy (specific gravity 0.8), coarse grained, weak, brittle, takes good polish and is rather resistant to moisture and insects although very susceptible to attack by dry-wood termites. Gum or resin: The tree yields a thick mucilage of water-soluble of gum in yellowish or reddish-brown warty tears; the seeds contain gum that may find use in textile and food industries. Medicine: Bark has medicinal properties. Other products: The hard, elongated seeds are occasionally used as beads.
Services
Shade or shelter: D. regia is planted as a shade tree in dairy farms, tea plantations and compounds. Ornamental: It is mainly valued as a decorative tree, often being planted in avenues and gardens. Boundary or barrier or support: D. regia can be planted as live fence posts.
Pests and diseases
Beetles and larvae of Poecilips sierralemensis bore into the pods to release the seeds. Trees are susceptible to attack by shoot borers and are occasionally defoliated by a caterpillar or an insect; leaves may be eliminated completely. D. regia is attacked by Ganoderma lucidum root rot, especially in the high rainfall areas.
Bibliography
Anon. 1986. The useful plants of India. Publications & Information Directorate, CSIR, New Delhi, India.Bein E. 1996. Useful trees and shrubs in Eritrea. Regional Soil Conservation Unit (RSCU), Nairobi, Kenya.
Bekele-Tesemma A, Birnie A, Tengnas B. 1993. Useful trees and shrubs for Ethiopia. Regional Soil Conservation Unit (RSCU), Swedish International Development Authority (SIDA).
Birnie A. 1997. What tree is that? A beginner's guide to 40 trees in Kenya. Jacaranda designs Ltd.
El Hadidi MN, Boulos L. 1988. The trees of Egypt. The American University in Cairo Press. 113, Sharia Kasr el Aini.
Hong TD, Linington S, Ellis RH. 1996. Seed storage behaviour: a compendium. Handbooks for Genebanks: No. 4. IPGRI.
ICRAF. 1992. A selection of useful trees and shrubs for Kenya: Notes on their identification, propagation and management for use by farming and pastoral communities. ICRAF.
Katende AB et al. 1995. Useful trees and shrubs for Uganda. Identification, Propagation and Management for Agricultural and Pastoral Communities. Regional Soil Conservation Unit (RSCU), Swedish International Development Authority (SIDA).
Keay RW. 1989. Trees of Nigeria. Claredon Press Oxford.
Lanzara P and Pizetti M. 1978. Simon & Schuster’s guide to trees. Simon & Schuster, Inc., New York.
Little EL, Wadsworth FH. 1964. Common trees of Puerto Rico and the Virgin Islands. Agricultural Handbook. No. 249. US Department of Agriculture. Washington DC.
Luna RK. 1996. Plantation trees. International Book Distributors, Dehra Dun, India.
Mbuya LP et al. 1994. Useful trees and shrubs for Tanzania: Identification, Propagation and Management for Agricultural and Pastoral Communities. Regional Soil Conservation Unit (RSCU), Swedish International Development Authority (SIDA).
Noad T, Birnie A. 1989. Trees of Kenya. General Printers, Nairobi.
Storrs AEG. 1995. Know your trees: some common trees found in Zambia. Regional Soil Conservation Unit (RSCU).
Streets RJ. 1962. Exotic forest trees of the British Commonwealth. Claredon Press, Oxford.
Vogt K. 1995. A field guide to the identification, propagation and uses of common trees and shrubs of dryland Sudan. SOS Sahel International (UK).
Williams R.O & OBE. 1949. The useful and ornamental plants in Zanzibar and Pemba. Zanzibar Protectorate.
(://www.worldagroforestrycentre.org)
Jamur akar merah
| Penyakit | : | Jamur akar merah |
| Penyebab | : | Ganoderma philippii (Bres. & Henn.) |
| Inang | : | Flamboyan (Delonix regia Rafin.) |
| Gejala | : | Gejala berupa akar yang sakit tertutup oleh miselium berwarna merah yang melekat dengan tanah, gejala lanjut miselium akan berwarna merah anggur tua. Kayu yang terinfeksi berwarna kuning suram pucat, busuk basat, terkadang kering, tergantung pada kondisi tanah. Pada gejala lanjut, cendawan akan membentuk tubuh buah pada pangkal batang, berbentuk seperti kuku kuda (console, bracket) tipis, keras, berkayu, permukaan atasnya cokelat merah tua, permukaan bawah putih krem, dan berlekuk. Gejala yang tampak berupa daun-daun menguning, layu, dan gugur, sehingga lama-kelamaan tanaman akan menjadi gundul. |
| Deskripsi | : | Penularan penyakit terjadi karena adanya kontak antara akar tanaman sakit dengan akar tanaman sehat; spora cendawan hanya dapat menginfeksi tunggul tanaman sakit/ rentan. |
| Pengendalian | : | Pada saat akan melakukan peremajaan/ penanaman, semua sisa tanggul tanaman/ akar harus dibersihkan; Pohon yang sakit atau mati harus dibongkar; dibuat selokan isolasi atau pembukaan leher akar; Pengelolaan drainase yang baik. |
Jamur akar putih
| Penyakit | : | Jamur akar putih |
| Penyebab | : | Rigidoporus lignosus (Klotzsch) Imazeki |
| Inang | : | Flamboyan (Delonix regia Rafin.) |
| Gejala | : | Cendawan membentuk miselium berwarna putih, bercabang-cabang yang melekat erat pada permukaan akar. Tubuh buah dibentuk pada pangkal batang, berbentuk tipis, berwarna merah jambu. |
First report of Ganoderma colossus on Delonix regia in Oman
S. Al-Bahry1, A.E. Elshafie1* and M. Deadman2
1 Department of Biology, Sultan Qaboos University, PO Box 34, Al Khod 123, Sultanate of Oman
2 Department of Crop Sciences, Sultan Qaboos University, PO Box 34, Al Khod 123, Sultanate of Oman
2 Department of Crop Sciences, Sultan Qaboos University, PO Box 34, Al Khod 123, Sultanate of Oman
*elshafie@squ.edu.om
Accepted: 14 Jun 2004
The flame tree (Delonix regia) is an important introduced amenity tree in Oman. It is planted on roadsides, in parks and public gardens for its beautiful flowers and elegant fernlike, bi-pinnate leaves. It is an excellent heat-tolerant plant, with moderate water needs. At Sultan Qaboos University, Oman in September 2003, several Delonix trees developed bracket-like, spongy, sessile basidocarps, which were yellow above and brown below (Fig. 1A). Around 20 severely infected trees were examined and uprooted. These displayed symptoms of leaf yellowing and branch death. An increase in the incidence of leaf yellowing, with branch and plant death was observed during the summer period (average temperature 40°C). Basidiocarps emerging from branches and tree trunks caused cracking of the bark followed by secretions of dark brown gummy substances. The brackets were identified as Ganoderma colossus# at Royal Botanic Garden Kew (RBGK), United Kingdom. The basidiospores were brown, ovate, rough-walled, bitunicate, 14-16 x 9-11 mm (Fig. 1B).
The only previous record of this fungus on Delonix regia, that we are aware of, is from Vietnam (Kleinwachter et al., 2001). In this case no external symptoms were recorded, such as the leaf yellowing and branch death observed in Oman. G. colossus is a pantropical species, which has been reported on a range of species. The species was originally described from Costa Rica and occurs on Phoenix canariensis, Ficus carica and Celtis laevigata in the USA (Adaskaveg & Gilbertson, 1988) and as a root and stem rot pathogen of pine, eucalyptus andCallitris in South Africa (Luckhoff, 1955). Specimens of G. colossus are held at RBGK originating from Saudi Arabia (date palm), Malaysia and Sierra Leone (oil palm), Pakistan (bamboo) and on Gmelina arborea from Nigeria.
This is the first record of G. colossus on D. regia in Oman and research is now underway at Sultan Qaboos University to examine its implications for D. regia and the economically important date palms (Phoenix dactylifera). We suspect that the source of the infection is the imported peat moss used for improving the soil. The same fungus has also been observed infecting Ficus altissima at the same campus (Elshafie et al., 2004).
#Editor's note: G. colossus is also wrongly described as G. colossum, a common orthographic error.
Figure 1: A (main photo): Basidiocarps of Ganoderma colossus on trunk of Delonix regia. B (inset): basidiospores
Acknowledgements
We are grateful to Peter Roberts for the identification of G. colossus and information about specimens held at RBGK.
References
Adaskaveg JE, Gilbertson RL, 1988. Basidiospores, pilocystidia and other basidioscarp characters in several species of the Ganoderma lucidum complex. Mycologia 80, 493-507.
Elshafie A, Al Bahri S, Al Saadi A, Al Raeesi A, Al Maqbali Y, Deadman M, 2004. First report of Ganoderma colossus on Ficus altissima in Oman. New Disease Reports (www.bspp.org.uk/ndr) Volume 9: February - July 2004.
Kleinwachter P, Anh N, Keit TT, Schlegel B, Dahse HM, Hartl A, Grafe U, 2001. Colossolactones, new triterpenoid metabolites from Vietnam mushroom Ganoderma colossum. Journal of Natural Products 64, 236-239.
Luckhoff HA, 1955. Two hitherto unrecorded fungal diseases attacking Pines and Eucalyptus in South Africa. Journal of South African Forestry Association 26, 47-61.
©2004 The Authors
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