Browsing Agronomía by Title
Now showing items 489-508 of 668
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Occurrence and characterisation of calcium oxalate crystals in stems and fruits of Hylocereus costaricensis and Selenicereus megalanthus (Cactaceae: Hylocereeae)
(2016-10)Detailed description about occurrence of calcium oxalate (CaOx) crystals in the edible vine cactus species Hylocereus costaricensis and Selenicereus megalanthus is scarce. Therefore, we evaluated and characterized the ... -
Occurrence of Potato Powdery Scab Caused by Spongospora subterranea f. sp. subterranea in Costa Rica
(2002-11)Powdery scab of potatoes, caused by Spongospora subterranea (Wallr.) Lagerheim f. sp. subterranea Tomlinson, is important worldwide due to its effect on tuber quality and transmission of Potato mop-top virus. Although ... -
Occurrence of Squash yellow mild mottle virus and Pepper golden mosaic virus in Potential New Hosts in Costa Rica
(2013-09)Leaf samples of Solanum lycopersicum, Capsicum annuum, Cucurbita moschata, Cucurbita pepo, Sechium edule and Erythrina spp. were collected. All samples were positive for begomoviruses using polymerase chain reaction and ... -
Oomycete Species Associated with Soybean Seedlings in North America—Part I: Identification and Pathogenicity Characterization
(2017)Oomycete pathogens are commonly associated with soybean root rot and have been estimated to reduce soybean yields in the United States by 1.5 million tons on an annual basis. Limited information exists regarding the frequency ... -
Oomycete Species Associated with Soybean Seedlings in North America—Part II: Diversity and Ecology in Relation to Environmental and Edaphic Factors
(2017)Soybean (Glycine max (L.) Merr.) is produced across a vast swath of North America, with the greatest concentration in the Midwest. Root rot diseases and damping-off are a major concern for production, and the primary causal ... -
La organización y función del genoma del virus del mosaico dorado del frijol
(Universidad de Costa Rica, 1994) -
Papaya
(2015-01-01)Papaya (Carica papaya) is a semiwoody, usually single-stemmed, herbaceous plant (Fig. 1). It originated along the Caribbean lowlands of Mesoamerica and is now extensively and exclusively distributed in tropical and subtropical ... -
Papaya fruit image analysis in a segregating F2 mapping population
(2019)Image analysis can be used to phenotype papaya fruits and to extract from single images as many fruit properties as possible. This becomes especially attractive for mapping large populations, which, because of their size, ... -
Papaya ringspot virus and Cucumber mosaic virus associated with a severe mosaic in melon
(1991-09)Severe mosaic disease was observed in several melon fields in Costa Rica during the period 1987-1991. Two viruses, papaya ringspot virus (PRSV) and cucumber mosaic virus (CMV) were associated in single and mixed infections ... -
Participation of plant hormones in determination and progression of somatic embryogenesis
(2005-11)In vitro culture protocols have been developed for many species, mainly using empirical approaches, to induce somatic embryogenesis from various explant types. However, the underlying biochemical mechanisms governing ... -
Particle size and roasting on water sorption in conilon coffee during storage
(2016)The aim of this work was to evaluate alterations on the water sorption of coffee due to the effect of roast, grind and storage in two temperatures (10 and 30 ºC) during 180 days. Crude grain coffee (Coffea canephora) with ... -
Perspectiva socio-económica sobre la precocidad en frijol
(Universidad de Costa Rica, 1988)La precocidad es un concepto de fitomejoramiento y producción que presenta muchas dimensiones diferentes. Afecta el riesgo, el manejo de cultivos, la mano de obra, el uso de la tierra y del capital, las posibilidades de ... -
Perspectivas para el uso de marcadores moleculares en el mejoramiento del frijol
(Universidad de Costa Rica, 1989)Los marcadores moleculares son la herramienta más novedosa para el mejoramiento de cultivos en los últimos años. En el caso de frijol (Phaseolus vulgaris L) ya existen una gama amplia de marcadores de ADN para caracteres ... -
Peso estimado en cabras con una cinta comercial de pesaje y perímetro torácico
(2017)El objetivo del presente trabajo fue determinar la viabilidad técnica de utilizar una cinta para medir la circunferencia pectoral y estimar el peso corporal en caprinos. El estudio se llevó a cabo en la Estación Experimental ... -
Phenotype of Arabidopsis thaliana semi-dwarfs with deep roots and high growth rates under water-limiting conditions is independent of the GA5 loss-of-function alleles
(2015-07-10)BACKGROUND AND AIMS: The occurrence of Arabidopsis thaliana semi-dwarf accessions carrying inactive alleles at the gibberellin (GA) biosynthesis GA5 locus has raised the question whether there are pleiotropic effects on ... -
Plan operacional de transacción periódica: PROFRIJOL-POT 1999-2003
(Universidad de Costa Rica, 1999) -
Plan operativo anual: POA 1996 / 97
(Universidad de Costa Rica, 1996)