Ciencias agroalimentarias

Modelo de programación lineal para minimizar el costo de fertilización granulada de macro nutrimentos en el cultivo de la zanahoria en Costa Rica

Paniagua Molina, Javier (2015)

Se empleó un modelo de programación lineal para minimizar el costo de la fertilización de nutrimentos mayores, N, P, K, Ca y Mg, con la finalidad de buscar mecanismos para mejorar la competitividad de ...

Melón (Cucumis melo L.) cultivado bajo invernadero: correlaciones entre variables

Monge Pérez, José Eladio; Loría Coto, Michelle (2019-03-02)

Se establecieron correlaciones de Pearson para 63 genotipos de melón producidos bajo invernadero, entre cinco variables cuantitativas: peso del fruto (g), número de frutos por metro cuadrado, rendimiento por área (ton/ha), ...

First Report of Potato Spindle Tuber Viroid in Costa Rica

Badilla Porras, Ramsés; Hammond, Rosemarie W.; Rivera Herrero, Carmen (1999-11)

During 1997 to 1998, symptoms of leaf roll, dwarfism, chlorosis, and occasional leaf necrosis were observed on Solanum tuberosum in several plots in Cartago, the principal potato-production region of Costa Rica. Because ...

Catharanthus roseus (Apocynaceae) naturally infected with diverse phytoplasmas in Costa Rica

Villalobos Muller, William; Bottner, Kristi D.; Lee, Ing-Ming; Montero Astúa, Mauricio; Albertazzi Castro, Federico José; Coto Morales, Teresita; Sandoval Carvajal, Izayana; Garita Salazar, Laura Cristina; Moreira Carmona, Lisela (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 ...

First Report of New Phytoplasma Diseases Associated with Soybean, Sweet Pepper, and Passion Fruit in Costa Rica

Villalobos Muller, William; Moreira Carmona, Lisela; Rivera Herrero, Carmen; Lee, Ing-Ming (2009-02)

A new soybean disease outbreak occurred in 2002 in a soybean (Glycine max) plantation in Alajuela Province, Costa Rica. Symptoms on the affected plants included general stunting, small leaves, formation of excessive buds, ...

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 ...

Genetic Diversity of Xylella fastidiosa Strains from Costa Rica, São Paulo, Brazil, and United States

Montero Astúa, Mauricio; Hartung, John; Aguilar Alvarez, Estela Yamileth; Chacón Díaz, Carlos; Li, Wenbin; Albertazzi Castro, Federico José; Rivera Herrero, Carmen (2007-10)

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 ...

Confirmation of Xylella fastidiosa infecting grapes (Vitis vinifera) in Costa Rica

Aguilar Alvarez, Estela Yamileth; Moreira Carmona, Lisela; Rivera Herrero, Carmen (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 ...

First Report of Xylella fastidiosa Infecting Citrus in Costa Rica

Aguilar Alvarez, Estela Yamileth; Villalobos Muller, William; Moreira Carmona, Lisela; Rodríguez Solís, Carlos Mario; Kitajima, Elliot W.; Rivera Herrero, Carmen (2005-06)

Citrus variegated chlorosis (CVC) is an important disease mainly of sweet orange (Citrus sinensis (L.) Osbeck) cultivars. It was first described in Brazil in the state of Sā Paulo in 1987 (4). The disease has spread to all ...

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 ...

Meiosis Research in Orphan and Non-orphan Tropical Crops

Bolaños Villegas, Pablo Alberto; Argüello Miranda, Orlando (2019-03-05)

Plant breeding is directly linked to the development of crops that can effectively adapt to challenging conditions such as soil nutrient depletion, water pollution, drought, and anthropogenic climate change. These ...

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 ...

Evaluación preliminar de 201 genotipos de ocho diferentes hortalizas (berenjena, chile dulce, zucchini, ayote, sandía, pepino, tomate y melón) cultivados bajo invernadero en Costa Rica

Monge Pérez, José Eladio (2016-07)

El cambio climático puede tener grandes consecuencias en el cultivo de alimentos. Este capítulo hace una evaluación de características morfológicas, rendimiento y calidad de 8 diferentes hortalizas. Se presentan los cuadros ...