Now showing items 21-30 of 72
Genetic Diversity of Xylella fastidiosa Strains from Costa Rica, São Paulo, Brazil, and United States
The diversity of 42 Xylella fastidiosa strains from Costa Rica, São Paulo, Brazil, and the United States were analyzed using the sequence of the 16S rRNA gene by variable number of tandem repeat (VNTR) fragment analysis ...
Incidence, Distribution, and Association of Spongospora subterranea and Potato mop-top virus in Costa Rica
A survey was conducted in 39 potato (Solanum tuberosum) fields in Costa Rica to determine incidence and association of Spongospora subterranean f. sp. subterranea and Potato mop-top pomovirus (PMTV). The fields were located ...
The Complex Biogeography of the Plant Pathogen Xylella fastidiosa: Genetic Evidence of Introductions and Subspecific Introgression in Central America
The bacterium Xylella fastidiosa is a plant pathogen with a history of economically damaging introductions of subspecies to regions where its other subspecies are native. Genetic evidence is presented demonstrating the ...
Confirmation of Xylella fastidiosa infecting grapes (Vitis vinifera) in Costa Rica
Confirmación de la presencia de Xylella fastidiosa infectando vid (Vitis vinifera) en Costa Rica
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 ...
First Report of the Cymbidium Mosaic Potexvirus (CymMV) Infecting the Terrestrial Orchid Phaius tankervilliae in Costa Rica
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, ...
Algunos factores que afectan la transmisión del virus del rayado fino del maíz por Dalbulus maidis DeLong & Wolcott
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 ...
Adaptación de una técnica de inmunosorbencia (ELISA) a la detección del virus del rayado fino del maíz en su insecto vector
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 ...
Beetle vectors of Cowpea Mosaic Virus in Costa Rica
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 ...
First Report of Xylella fastidiosa in Nerium oleander in Costa Rica
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 ...