Listar Ciencias agroalimentarias por título
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First Report of Citrus variegation virus in Palestine Sweet Lime, as Coffee Shade in Costa Rica
(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
(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
(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
(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
(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
(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
(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
(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
(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
(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
(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
(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 ... -
Fitopatología y comportamientos culturales: posible introducción de la cepa de chaya del Cassava common mosaic virus en Costa Rica
(2023-12-30)Objetivo/Antecedentes. Las hojas del arbusto de chaya (Cnidoscolus aconitifolius) o árbol espinaca, o chicasquil (en Costa Rica), son parte de la tradición culinaria Mesoamericana, con origen en el sur de México y ... -
Flameo y nitrato como nuevas opciones para el manejo de plantas arvenses en el cultivo de café en finca La Hilda, San Pedro de Poás, Alajuela
(2024-01-12)La producción de café se encuentra amenazada por los efectos del cambio climático, para enfrentar tales efectos se pueden realizar prácticas agroecológicas que permitirán la rentabilidad económica y ambiental. Las plantas ... -
Floración in vitro - revisión de literatura
(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 ... -
Flores hembra de melón (Cucumis melo)
(2021-05-31)La presentación contiene fotografías de diversos genotipos de flores hembra de melón (Cucumis melo). -
Flujo de germoplasma e impacto del PROFRIJOL en Centroamérica: periodo 1987-1996
(Universidad de Costa Rica, 1997)En Centro América se cultivan actualmente más de 480,000 ha con frijoles color negro, rojo, moteados y rosados, obteniéndose unas 461,000 Tm de producción, con rendimientos promedio que no sobrepasan los 700 kg/ ha. El ... -
Flujo de germoplasma, redes regionales de Investigación agrícola y el papel de los derechos de propiedad intelectual
(Universidad de Costa Rica, 1999)En el pasado, el germoplasma ha fluido libremente sin que se presentaran problemas importantes entre todas las instituciones participantes dentro de cada red. Sin embargo, los cambios recientes en el ambiente en que la ... -
Forage biomass estimated with a pre-calibrated equation of a rising platemeter in pastures grown in tropical conditions
(2023)Accurate estimates of forage biomass allow for better adjustments of stocking rate, carrying capacity, and dry matter intake in livestock operations. Among the most common methods to estimate biomass are platemeters, for ... -
Forage Brassicas Stockpiled for Fall Grazing: Yield and Nutritive Value
(2016-01)Forage brassicas can potentially be used to extend the grazing season into the fall for beef cattle operations, thereby reducing input costs. Nine cultivars of forage brassicas were seeded on two planting dates, and their ...