Roystonea Oleracea (Jacq.) O.F.Cook

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Roystonea oleracea (Jacq.) O.F.Cook También llamada palma real del Caribe, es una impresionante palmera nativa del norte de Venezuela, Colombia, y algunas islas de las Antillas Menores. Pertenece a la familia de las Arecáceas. El nombre de Roystonea se puso como homenaje al general estadounidense del siglo XIX Roy Stone, que mandaba las tropas que invadieron Puerto Rico, la palabra oleracea tiene origen latino, y en botánica se usa para plantas que se consumen como alimento, ya que su palmito era muy apreciado en Martinica. Por otro lado su fruto es rico en aceite, por lo que en su zona de origen es utilizado como alimento del ganado porcino. Tiene un majestuoso tronco columnar que puede superar los 30 m de altura y los 60 cm de diámetro, es la mayor de este género. Las bases de las hojas tienen una vaina que abraza la parte superior del tronco formando lo que se llama un capitel, en este caso es de color verde claro y muy decorativo. La hoja es pinnada y de aspecto ordenado, ya que los foliolos se disponen en uno o dos planos a ambos lados del raquis, hecho que la diferencia de otra especie muy parecida y más conocida, la R. regia, que tiene los foliolos más estrechos y en varios planos, lo que le da a la hoja una apariencia plumosa. Son de un verde oscuro por el haz y más claro por el envés. De la parte inferior del citado capitel nacen las inflorescencias, que son ramificadas y portan tanto las flores masculinas como femeninas, por lo que es una planta monoica. Las flores son blanquecinas y el fruto es una drupa de color marrón purpúreo al madurar. Produce néctar y polen en abundancia, lo que resulta muy atractivo para las abejas, que son sus principales polinizadores. De sus frutos se alimentan guacamayos y loros, que ayudan a dispersar las semillas. Es de crecimiento rápido; necesita una situación soleada y riego abundante. Imperial palm, cabbage palm .

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Red Ring Disease of Coconut Palms Is Caused by the Red Ring Nematode (Bursaphelenchus Cocophilus), Though This Nematode May Also Be Known As the Coconut Palm Nematode
1 Red ring disease of coconut palms is caused by the red ring nematode (Bursaphelenchus cocophilus), though this nematode may also be known as the coconut palm nematode. This disease was first described on coconut palms in 1905 in Trinidad and the association between the disease and the nematode was reported in 1919. The vector of the nematode is the South American palm weevil (Rhynchophorus palmarum), both adults and larvae. The nematode parasitizes the weevil which then transmits the nematode as it moves from tree to tree. Though the weevil may visit many different tree species, the nematode only infects members of the Palmae family. The nematode and South American palm weevil have not yet been observed in Florida. 2 Information Sources: Brammer, A.S. and Crow, W.T. 2001. Red Ring Nematode, Bursaphelenchus cocophilus (Cobb) Baujard (Nematoda: Secernentea: Tylenchida: Aphelenchina: Aphelenchoidea: Bursaphelechina) formerly Rhadinaphelenchus cocophilus. University of Florida, IFAS Extension. EENY236. Accessed 11-27-13 http://edis.ifas.ufl.edu/in392 Griffith, R. 1987. “Red Ring Disease of Coconut Palm”. The American Pathological Society Plant Disease, Volume 71, February, 193-196. accessed 12/5/2013- http://www.apsnet.org/publications/plantdisease/ba ckissues/Documents/1987Articles/PlantDisease71n02_193.PDF Griffith, R., R. M. Giblin-Davis, P. K. Koshy, and V. K. Sosamma. 2005. Nematode parasites of coconut and other palms. M. Luc, R. A. Sikora, and J. Bridges (eds.) In Plant Parasitic Nematodes in Subtropical and Tropical Agriculture. C.A.B. International, Oxon, UK. Pp. 493-527. 2 The host trees susceptible to the red ring nematode are usually found in the family Palmae.
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