Now showing items 242-261 of 420

    • Factores que influyen en la embriogénesis somática in vitro de palmas (Arecaceae) 

      Viñas Meneses, María; Jiménez García, Víctor (2011-12)
      La embriogénesis somática (ES) es una vía de desarrollo in vitro que presenta una serie de ventajas sobre otras técnicas utilizadas para la regeneración de palmas. Esta técnica tiene gran potencial para superar las ...
    • Fatty acids and triacylglycerols in the mesocarp and kernel oils of maturing Costa Rican Acrocomia aculeata fruits 

      Lieb, Veronika M.; Schex, Roland; Esquivel Rodríguez, Patricia; Jiménez García, Víctor; Schmarr, Hans-Georg; Carle, Reinhold; Steingass, Christof Björn (2019-03)
      Total lipids, fatty acids, and triacylglycerols in mesocarp and kernels from Costa Rican Acrocomia aculeata fruits were characterized at three maturity stages. C16:0 and C18:1n9 were the most abundant fatty acids in the ...
    • Field Survey of Cucumber mosaic virus Subgroups I and II in Crop Plants in Costa Rica 

      Hord Dedmon, Melanie Jane; García Piñeres, Alfonso J.; Villalobos Barrantes, Heidy M.; Rivera Herrero, Carmen; Macaya Trejos, Gabriel; Roossinck, Marilyn J. (2001-09)
      Leaf samples were collected from cucurbit and solanaceous crop plants and Musa spp. in 28 locations in five provinces of Costa Rica during the period from January to October 1996. Sampling sites were selected in dry, humid, ...
    • First Report of an Aster Yellows Subgroup 16SrI-B Phytoplasma Infecting Chayote in Costa Rica 

      Villalobos Muller, William; Moreira Carmona, Lisela; Rivera Herrero, Carmen; Bottner Parker, Kristi D.; Lee, Ing-Ming (2002-03)
      An outbreak of a witches' broom disease affected approximately 20% of plants in several chayote (Sechium edule (Jacq.) Schwartz) fields in the commercial production area of the Ujarrás Valley, Cartago Province, Costa Rica ...
    • First Report of Citrus Blight in Costa Rica 

      Villalobos Muller, William; Moreira Carmona, Lisela; Derrick, Kenneth S.; Beretta, M.J.G.; Lee, Richard F.; Rivera Herrero, Carmen (2005-01)
      Citrus blight (CB), causing a chronic decline of citrus, has been an important disease in Florida for over 100 years. CB was first reported in Brazil in the 1980s and is now responsible for the removal of nearly 10% of the ...
    • First Report of Citrus variegation virus in Palestine Sweet Lime, as Coffee Shade in Costa Rica 

      Moreira Carmona, Lisela; Albertazzi Castro, Federico José; Garita Salazar, Laura Cristina; Ortiz Arias, Beatriz; Villalobos Muller, William (2011)
      Symptoms resembling those of Citrus variegation virus (CVV) were observed in old Palestine sweet lime trees (Citrus limettioides Tan.) used as coffee shade in the Central Valley in Costa Rica. The symptoms include leaf ...
    • First report of Iris yellow spot virus in Costa Rica 

      Montero Astúa, Mauricio; Dejuk Protti, Natasha; Vásquez Céspedes, Elena; Garita Salazar, Laura Cristina; Moreira Carmona, Lisela (2017)
      Iris yellow spot virus (IYSV), an emerging disease of onion crops, was identified by transmission electron microscopy, enzyme linked immunosorbent assay, and reverse transcription polymerase chain reaction in Costa Rica. ...
    • First Report of New Phytoplasma Diseases Associated with Soybean, Sweet Pepper, and Passion Fruit in Costa Rica 

      Villalobos Muller, William; Moreira Carmona, Lisela; Rivera Herrero, Carmen; Lee, Ing-Ming (2009-02)
      A new soybean disease outbreak occurred in 2002 in a soybean (Glycine max) plantation in Alajuela Province, Costa Rica. Symptoms on the affected plants included general stunting, small leaves, formation of excessive buds, ...
    • First Report of Orchid fleck virus in Costa Rica 

      Moreira Carmona, Lisela; Rivera Herrero, Carmen; Rodríguez Solís, Carlos Mario; Kitajima, Elliot Watanabe; Freitas Astúa, Juliana (2002-12)
      Orchid fleck virus (OFV), a tentative member of the family Rhabdoviridae, infects orchids in several countries. The virus is vectored worldwide by the mite Brevipalpus californicus (Banks) (Acari: Tenuipalpidae). Eleven ...
    • First Report of Potato Spindle Tuber Viroid in Costa Rica 

      Badilla Porras, Ramsés; Hammond, Rosemarie W.; Rivera Herrero, Carmen (1999-11)
      During 1997 to 1998, symptoms of leaf roll, dwarfism, chlorosis, and occasional leaf necrosis were observed on Solanum tuberosum in several plots in Cartago, the principal potato-production region of Costa Rica. Because ...
    • First report of Sugarcane yellow leaf virus (ScYLV) in Costa Rica 

      Ávila Arias, Roberto; Arrieta Méndez, Marie-Claire; Villalobos Muller, William; Moreira Carmona, Lisela; Chavarría Soto, Erick; Lockhart, Benham E.; Rivera Herrero, Carmen (2001-03)
      In Costa Rica, sugarcane plants with symptoms similar to those described for yellow leaf syndrome (YLS) (1,2) were first observed in 1994 in research plots of imported material in the midland areas of San Carlos and ...
    • First Report of the Cymbidium Mosaic Potexvirus (CymMV) Infecting the Terrestrial Orchid Phaius tankervilliae in Costa Rica 

      Moreira Carmona, Lisela; Villalobos Muller, William; Hsu, H.T.; Rodríguez Cerezo, Emilio; Rivera Herrero, Carmen (1998-10)
      In 1996, plants of the terrestrial orchid Phaius tankervilliae from a nursery in the Central Valley of Costa Rica were observed with mild to severe foliar symptoms of chlorotic streak. No differences were observed in growth, ...
    • First Report of Xylella fastidiosa in Avocado in Costa Rica 

      Montero Astúa, Mauricio; Saborío Rodríguez, Guido Alonso; Chacón Díaz, Carlos; Garita Salazar, Laura Cristina; Villalobos Muller, William; Moreira Carmona, Lisela; Hartung, John; Rivera Herrero, Carmen (2008-01)
      Since the late 1990s, chlorotic mottling, marginal scorch, deformation of leaves, defoliation, shortening of internodes, and branch dieback have been observed in avocado trees (Persea americana Mill.) in Costa Rica. The ...
    • First Report of Xylella fastidiosa in Nerium oleander in Costa Rica 

      Montero Astúa, Mauricio; Saborío Rodríguez, Guido Alonso; Chacón Díaz, Carlos; Villalobos Muller, William; Rodríguez Solís, Carlos Mario; Moreira Carmona, Lisela; Rivera Herrero, Carmen (2008-08)
      Oleander (Nerium oleander L.) shrubs presenting mottling, leaf tip and margin scorch, short internodes, defoliation, and branch dieback were observed at different localities in the Central Valley in Costa Rica. Severity ...
    • First Report of Xylella fastidiosa Infecting Citrus in Costa Rica 

      Aguilar Alvarez, Estela Yamileth; Villalobos Muller, William; Moreira Carmona, Lisela; Rodríguez Solís, Carlos Mario; Kitajima, Elliot Watanabe; Rivera Herrero, Carmen (2005-06)
      Citrus variegated chlorosis (CVC) is an important disease mainly of sweet orange (Citrus sinensis (L.) Osbeck) cultivars. It was first described in Brazil in the state of Sā Paulo in 1987 (4). The disease has spread to all ...
    • First report of Xylella fastidiosa infecting coffee in Costa Rica 

      Rodríguez Solís, Carlos Mario; Obando Jiménez, Juan José; Villalobos Muller, William; Moreira Carmona, Lisela; Rivera Herrero, Carmen (2001-09)
      In 1995, severe symptoms were observed on ‘Caturra’ and ‘Catuaí’ coffee (Coffea arabica L.) varieties in farms in the southern part of the Central Valley in Costa Rica. Symptoms were reduced leaf size, malformation of ...
    • Floración in vitro - revisión de literatura 

      Jiménez García, Víctor; Montero Carmona, Wayner (2009-01)
      La floración in vitro puede ser inducida en diferentes estadios durante el desarrollo de las plantas in vitro mediante variaciones en los factores físicos y químicos relacionados con el cultivo de tejidos. Dentro de los ...
    • Frecuencia de los hongos asociados al desarrollo de mohos poscosecha en el pedúnculo de la piña en dos zonas de Costa Rica 

      Castro Chinchilla, Johanny; Umaña Rojas, Gerardina (2017)
      La piña es uno de los principales cultivos de exportación en Costa Rica y la presencia de moho en el pedúnculo afecta su calidad en los mercados internacionales. El objetivo de esta investigación fue determinar en frutos ...