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Isolation and molecular characterization of Xylella fastidiosa from coffee plants in Costa Rica. 

Aguilar Alvarez, Estela Yamileth; Rodríguez Solís, Carlos Mario; Garita Salazar, Laura Cristina; Villalobos Muller, William; Moreira Carmona, Lisela; Hartung, John; Rivera Herrero, Carmen; Montero Astúa, Mauricio; Chacón Díaz, Carlos (2008-10)
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 ...

First Report of Citrus Blight in Costa Rica 

Villalobos Muller, William; Moreira Carmona, Lisela; Derrick, Kenneth S.; Beretta, M.J.G.; Lee, Richard F.; Rivera Herrero, Carmen (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 Xylella fastidiosa in Avocado in Costa Rica 

Montero Astúa, Mauricio; Saborío Rodríguez, Guido Alonso; Chacón Díaz, Carlos; Garita Salazar, Laura Cristina; Villalobos Muller, William; Moreira Carmona, Lisela; Hartung, John; Rivera Herrero, Carmen (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 ...
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‘Candidatus Phytoplasma costaricanum’ a novel phytoplasma associated with an emerging disease in soybean (Glycine max). 

Lee, Ing-Ming; Bottner Parker, Kristi D.; Zhao, Yan; Villalobos Muller, William; Moreira Carmona, Lisela (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. ...

First Report of a Phytoplasma Associated with Witches'-Broom of the Giant Coral Tree (Erythrina poeppigiana,Fabaceae) in Costa Rica 

Saborío Rodríguez, Guido Alonso; Villalobos Muller, William (2007-11)
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Comparative Epidemiology of Citrus tristeza virus in Plantings of Various Citrus Species in Costa Rica, and Long Distance Spread by the Brown Citrus Aphid 

Gottwald, Timothy R.; Villalobos Muller, William; Rivera Herrero, Carmen (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 ...
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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 

Villalobos Muller, William; Martini, Marta; Garita Salazar, Laura Cristina; Osler, Ruggero; Moreira Carmona, Lisela; Muñoz García, Melania Nelly (2011-04)
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 ...
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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. ...

Genipa americana and Ageratina anisochroma, two new hosts of Candidatus Phytoplasma asteris in Costa Rica 

Villalobos Muller, William; Montero Astúa, Mauricio; Coto Morales, Teresita; Sandoval Carvajal, Izayana; Moreira Carmona, Lisela (2018-08-23)
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 ...
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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 ...
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Villalobos Muller, William (24)
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  • Repositorios universitarios

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Repositorio Institucional de la Universidad de Costa Rica. Algunos derechos reservados. Este repositorio funciona con DSpace.