Listar Ciencias agroalimentarias por título

Mostrando ítems 1135-1154 de 2372

    • Fertilización nitrogenada en pastos del género Cynodon 

      Solano López, Marvin Jaroht; Villalobos Villalobos, Luis Alonso (2022)
      La fertilización nitrogenada de pasturas es una práctica agronómica utilizada para incrementar el rendimiento en forrajes. En esta investigación se revisó literatura en distintos países de América con el ...

    • Fichas de forrajes (piso, corte, arbustivas) 

      Villalobos Villalobos, Luis Alonso (2020)
      Documento realizado en el marco del Proyecto de la Red Nacional de Pastos y Forrajes, Coordinado por Cámara Nacional de Productores de Leche. Poryecto: Validación y transferencia de casos de éxito, técnicas y variedades ...

    • Field performance of hermaphrodite papaya plants obtained through molecular selection and micropropagation 

      Araya Valverde, Emanuel; Bogantes Arias, Antonio; Holst Sanjuán, Andrea; Vargas Mora, Cristian; Gómez Alpízar, Luis; Brenes Angulo, Arturo; Sánchez Barrantes, Elodia María; Chavarría Vargas, Max; Barboza Barquero, Luis Orlando (2019)
      Most commercial papaya varieties segregate hermaphrodite and female plants. Growers normally select hermaphrodite plants in the field, due to market preferences. This requires planting multiple plants per site and later ...

    • 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 insights into the prokaryotic community structure of Lake Cote, Costa Rica: Influence on nutrient cycling 

      Brenes Guillén, Laura Natalia; Vidaurre Barahona, Daniela; Avilés Vargas, Lidia; Castro Gutiérrez, Víctor Manuel; Gómez Ramírez, Eddy; González Sánchez, Kaylen; Mora López, Marielos; Umaña Villalobos, Gerardo; Uribe Lorío, Lorena; Hassard, Francis (2022-10-03)
      Prokaryotic diversity in lakes has been studied for many years mainly focusing on community structure and how the bacterial assemblages are driven by physicochemical conditions such as temperature, oxygen, and nutrients. ...

    • First Report of a Phytoplasma Associated with Witches'-Broom of the Giant Coral Tree (Erythrina poeppigiana,Fabaceae) in Costa Rica 

      Saborío Rodríguez, Guido Alonso; Villalobos Muller, William (2007-11)

    • 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 ...

    • Fistulación en bovinos y uso de la técnica de degradabilidad ruminal para análisis de alimentos 

      Elizondo Salazar, Jorge Alberto; Monge Rojas, Cynthia Rebeca (2020-12-16)
      La calidad nutritiva de los alimentos o ingredientes utilizados para la alimentación de los rumiantes está en función del nivel de consumo, de la degradabilidad a nivel ruminal, de la digestibilidad, de la concentración ...