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Genipa americana and Ageratina anisochroma, two new hosts of Candidatus Phytoplasma asteris in Costa Rica
We report two new plant species hosts for Candidatus Phytoplasma asteris: Genipa americana (Rubiaceae) and Ageratina anisochroma (Asteraceae). Phytoplasma infections were detected by real-time loop-mediated isothermal ...
Isolation and molecular characterization of Xylella fastidiosa from coffee plants in Costa Rica.
Coffee plants exhibiting a range of symptoms including mild to severe curling of leaf margins, chlorosis and deformation of leaves, stunting of plants, shortening of internodes, and dieback of branches have been reported ...
Guazuma ulmifolia (Sterculiaceae), a new natural host of 16SrXV phytoplasma in Costa Rica
Guazuma ulmifolia (Sterculiaceae), un nuevo hospedero natural de fitoplasmas del grupo 16SrXV en Costa Rica
Guacimo trees (Guazuma ulmifolia, Sterculiaceae) showing witches’ broom symptoms (GWB), small leaves, short internodes, stunting and no flower and fruit production were observed on side roads and fences in different areas ...
Chayote mosaic, a new disease in Sechium edule caused by a tymovirus
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. ...
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, ...
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
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 ...
First Report of Citrus variegation virus in Palestine Sweet Lime, as Coffee Shade in Costa Rica
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 Xylella fastidiosa infecting coffee in Costa Rica
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 ...
First Report of an Aster Yellows Subgroup 16SrI-B Phytoplasma Infecting Chayote in Costa Rica
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 Sugarcane yellow leaf virus (ScYLV) in Costa Rica
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 ...