Browsing Agronomía by Procedence
Now showing items 1-20 of 64
-
Adaptación de una técnica de inmunosorbencia (ELISA) a la detección del virus del rayado fino del maíz en su insecto vector
(1983-06)An enzyme-linked immunosorbent assay (ELISA) was adapted for detection of maize rayado fino virus (RFV) in its insect vector Dalbulus maidis. Optimization of experimental conditions for the assay included the use of ... -
Algunos factores que afectan la transmisión del virus del rayado fino del maíz por Dalbulus maidis DeLong & Wolcott
(1974)Previous reports have shown that the leafhopper Dalbulus maidis transmits rayado fino virus (RFV) of maize in a manner characteristic of viruses that multiply in their insect vectors. Further studies of the virus vector ... -
Beetle vectors of Cowpea Mosaic Virus in Costa Rica
(1978-03-25)Se probó la capacidad de nueve especies de escarabajos para transmitir un tipo de Cowpea Mosaic Virus de Costa Rica, estrechamente relacionado serológicamente al CPMV-Arkansas. Se logró la transmisión del virus con Cerotoma ... -
‘Candidatus Phytoplasma costaricanum’ a novel phytoplasma associated with an emerging disease in soybean (Glycine max).
(2011-12)A novel phytoplasma, designated strain SoyST1c1, associated with a newly emerging disease in soybean (Glycine max), known as soybean stunt (SoyST), was found in 2002 in a soybean plantation in Alajuela Province, Costa Rica. ... -
Caracterización del MStV asociado a una enfermedad de maíz en Costa Rica
(1991-09)Maize stripe virus (MStV) was identified as a causal agent of a corn disease in Costa Rica. Cytoplasmic inclusion bodies in needle, ring and eight-shapes were observed by light microscopy in infected leaf tissue. Different ... -
Catharanthus roseus (Apocynaceae) naturally infected with diverse phytoplasmas in Costa Rica
(2019-01-30)Phytoplasmas (class Mollicutes) are causal agents of plant diseases with an economic impact on crops or threatening local biodiversity. A survey was conducted from 2012 to 2016 on infected Catharanthus roseus plants that ... -
Chayote mosaic virus, a New Tymovirus Infecting Cucurbitaceae
(2000-10)Chayote mosaic virus (ChMV) is a putative tymovirus isolated from chayote crops in Costa Rica. ChMV was characterized at the host range, serological, and molecular levels. ChMV was transmitted mechanically and induced ... -
Chayote mosaic, a new disease in Sechium edule caused by a tymovirus
(1997-04)A sap-transmissible virus was isolated from chayote (Sechium edule) in Costa Rica. Infected plants showed chlorotic spots and rings, and blotchy mosaics, which often coalesced to give a complete mosaic and leaf deformation. ... -
Citrus Huanglongbing Associated with ‘Candidatus Liberibacter asiaticus’ Present in the Northern Region of Costa Rica but Has Not Been Detected in Other Citrus- Growing Areas
(2015-12)Since 2011, citrus Huanglongbing (HLB, ex-greening) disease has been detected in Los Chiles, Costa Rica, close to the Nicaraguan border, by the State Phytosanitary Service (Servicio Fitosanitario del Estado; SFE) and by ... -
Comparative Epidemiology of Citrus tristeza virus in Plantings of Various Citrus Species in Costa Rica, and Long Distance Spread by the Brown Citrus Aphid
(2002)Five 400-tree plots were established to compare the virus increase and spread of Citrus tristeza virus (CTV) among grapefruit, orange and lemon plots in San Carlos and Nicoya citrus producing areas of Costa Rica. Tree ... -
Confirmation of Xylella fastidiosa infecting grapes (Vitis vinifera) in Costa Rica
(2008-11)In 2003, symptoms of Pierce Disease (PD) were observed in two vineyards established in two different localities in San Jose province (Santa Ana and La Uruca) and in La Garita, Alajuela province. Twenty four symptomatic ... -
Cultivo de meristemas, termo y quimioterapia en chayote (Sechium edule Jacq. Sw.) para la erradicación del virus del mosaico del chayote (ChMV)
(2006)Recientemente se identificó en Costa Rica una nueva enfermedad viral en chayote, denominada "virus del mosaico del chayote" (ChMV, Chayote mosaic virus). Además de disminuir los rendimientos, esta enfermedad causa reducciones ... -
Detección de crinivirus y begomovirus en plántulas de tomate y arvenses asociadas a semilleros
(2017)El objetivo de este trabajo fue detectar infecciones causadas por el Tomato chlorosis virus (ToCV) y begomovirus en plántulas de tomate, y en las arvenses de los alrededores de los invernaderos. En el período de un año, a ... -
Detección del viroide de la exocortis en plantaciones comerciales, utilizando la selección 861-S1 del cidro Etrog (Citrus medica L.)
(2004)La prueba de infectividad empleada tradicionalmente para el viroide de la exocortis consiste en injertar yemas de los árboles por evaluar en clones sensibles, como el cidro Arizona 861-S1, el cual ha sido previamente ... -
Detection of Plantago asiatica mosaic virus in lily hybrid plants(Lilium spp.) in Costa Rica grown from imported bulbs
(2017-12)Plantago asiatica mosaic virus (PlAMV) was detected in Costa Rica infecting lily plants showing foliar chlorotic and necrotic streaking. Virus identity was established by TEM, sequencing and ELISA. Pathogenicity was confirmed ... -
Detection of Potyvirus-like Particles Associated with Oil Palms (Elaeis guineensis) in Ecuador
(1996-09-03)Oil palm (Elaeis guineensis Jacq.) seedlings showing a conspicuous mottling, composed of alternating dark green and chlorotic areas in the form of discontinuous streaks or irregular ring patterns, were observed in the ... -
Una doble infección viral en orquídeas del género Cymbidium
(1986)A double -viral infection in Cymbidium hybrids is described. Virions were discovered by negative staining of sick plant sap, which showed a rigid type and a flexible virus. Two types of viral-cytoplasmatic inclusions, ... -
Efecto de cuatro rizobacterias promotoras de crecimiento sobre la pudrición basal causada por Phytophthora capsici en plantas de chile dulce (Capsicum annuum)
(2015)La pudrición basal causada por Phytophthora capsici es la enfermedad más importante del chile (Capsicum annuum) ya que en el mundo, y en Costa Rica causa grandes pérdidas económicas; son necesarias alternativas al control ... -
Efecto de la infección de PVX y PVY en la producción de Solanum tuberosum en invernadero con los cultivares Floresta y Granola
(2004)Se realizaron dos ensayos en invernadero para medir el efecto de la infección de PVY y PVX en las variedades cultivadas de papa Floresta y Granola, comúnmente sembradas en Costa Rica. Se sembraron vitroplantas libres de ... -
Effects of coffee processing residues on anaerobic microorganisms and corresponding digestion performance
(2017)The objective of this study was to delineate the effects of different coffee processing residues on the anaerobic microbes and corresponding digestion performance. The results elucidated that mucilage-rich feed enhanced ...