Browsing Agronomía by Title
Now showing items 209-228 of 346
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Factores que influyen en la embriogénesis somática in vitro de palmas (Arecaceae)
(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 ... -
Field Survey of Cucumber mosaic virus Subgroups I and II in Crop Plants in Costa Rica
(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
(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
(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
(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 ... -
Genetic Diversification and Dispersal of Taro (Colocasia esculenta (L.) Schott)
(2016-06-17)Taro (Colocasia esculenta (L.) Schott) is widely distributed in tropical and sub-tropical areas. However, its origin, diversification and dispersal remain unclear. While taro genetic diversity has been documented at the ...