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Papaya ringspot virus and Cucumber mosaic virus associated with a severe mosaic in melon

Rivera Herrero, Carmen; Ramírez Fonseca, Pilar; Rodríguez Solís, Carlos Mario (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 ...

Occurrence of Potato Powdery Scab Caused by Spongospora subterranea f. sp. subterranea in Costa Rica

Montero Astúa, Mauricio; Vásquez Sancho, Viviana; Rivera Herrero, Carmen (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 ...

Adaptación de una técnica de inmunosorbencia (ELISA) a la detección del virus del rayado fino del maíz en su insecto vector

Rivera Herrero, Carmen; Gámez Lobo, Rodrigo (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 ...

Chayote mosaic, a new disease in Sechium edule caused by a tymovirus

Hord, Melanie J.; Villalobos Muller, William; Lizano Umaña, Ana Victoria; Rivera Herrero, Carmen (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. ...

Caracterización del MStV asociado a una enfermedad de maíz en Costa Rica

Rivera Herrero, Carmen; Ramírez Fonseca, Pilar (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 ...

Detección del viroide de la exocortis en plantaciones comerciales, utilizando la selección 861-S1 del cidro Etrog (Citrus medica L.)
Detection of CEVd in an orange grove using the Arizona 861-S1 selection of the ‘Etrog’ citron

Villalobos Muller, William; Moreira Carmona, Lisela; Alfaro, Víctor Hugo; Yglesias, Gustavo; Rivera Herrero, Carmen (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 ...

Identificación del virus del mosaico del maíz, un rhabdovirus, en Costa Rica

Rivera Herrero, Carmen; Pereira Reyes, Reinaldo (1994)

Maize mosaic virus (MMV), a rhabdovirus, was identified associated to maize field plants, showing stunting and continuous chlorotic stripes uniformely distributed over the leaf blade.The virus was detected in field samples ...

Infección de la orquídea terrestre Phaius tankervillae (Orchidaceae) con el cymbidium mosaic potexvirus (CymMV) en Costa Rica

Moreira Carmona, Lisela; Villalobos Muller, William; Rodríguez Cerezo, Emilio; Rivera Herrero, Carmen (1999)

En 1996, en un pequeño vívero comercial en la zona oeste del Valle Central de Costa Rica se observaron plantas de la orquídea terrestres Phaius tankervilliae que mostraban síntomas foliares de leves a severos de un estriado ...

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 ...