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Journal Article 1990

Autor: Zeigler, Robert S. Álvarez, E.

Ninety-five strains of fluorescent (presumed to be Pseudomonas spp.) and nonfluorescent pathogens of rice causing grain and sheath rot, dirty panicle, and manchado de grano, and 21 strains of nonpathogenic fluorescent pseudomonads isolated from rice grain and sheaths from 22 countries were compar...

Enlace original: https://cgspace.cgiar.org/handle/10568/43254

Investigación en Agricultura
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Zeigler, Robert S. ,  Álvarez, E. ,  [Characteristics of Pseudomonas spp. causing grain discoloration and sheath rot of rice, and associated pseudomonas epiphytes] ,  Characteristics of Pseudomonas spp. causing grain discoloration and sheath rot of rice, and associated pseudomonas epiphytes
Journal Article 1993

Autor: Levy, M Correa Victoria, Fernando J. Zeigler, Robert S. Xu, S Hamer, JE

We determined DNA fingerprints and pathotypes on international differentials for 151 isolates of the rice blast fungus Pyricularia grisea that were collected from 15 rice cultivars at a blast disease breeding nursery in Santa Rosa, Colombia. The pathogen population expressed an extraordinarily hi...

Enlace original: https://cgspace.cgiar.org/handle/10568/42892

Investigación en Agricultura
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Levy, M ,  Correa Victoria, Fernando J. ,  Zeigler, Robert S. ,  Xu, S ,  Hamer, JE ,  [Genetic diversity of the rice blast fungus in a disease nursery in Colombia] ,  Genetic diversity of the rice blast fungus in a disease nursery in Colombia
Journal Article 1987

Autor: Zeigler, Robert S. Álvarez, E.

Many types of symptoms associated with discolored grain have been observed on rice (Oryza sativa) sheaths, leaves, and grain in Mexico, Guatemala, Panama, Surinam, Colombia, Peru, and Brazil. These include brown necrotic lesions ranging from small specks to large brown to maroon sheath blotches. ...

Enlace original: https://cgspace.cgiar.org/handle/10568/43208

Investigación en Agricultura
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Zeigler, Robert S. ,  Álvarez, E. ,  [Bacterial sheath brown rot of rice caused by Pseudomonas fuscovaginae in Latin America] ,  Bacterial sheath brown rot of rice caused by Pseudomonas fuscovaginae in Latin America
Journal Article 1996

Autor: Martínez Racines, César Pompilio Correa Victoria, Fernando J. Amézquita, María Cristina Tulande Valencia, Edgar Lema, G Zeigler, Robert S.

Crosses were made between Fanny (highly susceptible to blast) and 11 cultivars differing in blast resistance. Using the pedigree method (PM) segregating generations were evaluated and selected for blast resistance. Via anther culture (AC), doubled-haploids were obtained from F1 plants and from F2...

Enlace original: https://cgspace.cgiar.org/handle/10568/43288

Investigación en Agricultura
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Martínez Racines, César Pompilio ,  Correa Victoria, Fernando J. ,  Amézquita, María Cristina ,  Tulande Valencia, Edgar ,  Lema, G ,  Zeigler, Robert S. ,  [Comparison of rice lines derived through anther culture and the pedigree method in relation to blast (Pyricularia grisea Sacc.) resistance] ,  Comparison of rice lines derived through anther culture and the pedigree method in relation to blast (Pyricularia grisea Sacc.) resistance
Journal Article 1990

Autor: Zeigler, Robert S. Morales, Francisco José

The inheritance of the ability of Sogatodes oryzicola to support replication of the rice hoja blanca virus (RHBV) was studied by following the segregation of progeny of crosses between insects of known pedigree and known ability to support virus replication and transmission. Virus transmission to...

Enlace original: https://cgspace.cgiar.org/handle/10568/43483

Investigación en Agricultura
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Zeigler, Robert S. ,  Morales, Francisco José ,  [Genetic determination of replication of rice hoja blanca virus within its planthopper vector, Sogatodes oryzicola] ,  Genetic determination of replication of rice hoja blanca virus within its planthopper vector, Sogatodes oryzicola
Journal Article 1987

Autor: Zeigler, Robert S. Aricapa, María Girlena Hoyos, E.

Pathogenic fluorescent Pseudomonas spp. were isolated from discolored rice seed and flag-leaf sheath samples received from Argentina, Bolivia, Brazil, Burundi, Chile, China, Colombia, Costa Rica, Cuba, Dominican Republic, Ecuador, El Salvador, Guatemala, Jamaica, Nicaragua, Panama, Peru, Philippi...

Enlace original: https://cgspace.cgiar.org/handle/10568/42748

Investigación en Agricultura
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Zeigler, Robert S. ,  Aricapa, María Girlena ,  Hoyos, E. ,  [Distribution of fluorescent Pseudomonas spp. causing grain and sheath discoloration of rice in Latin America] ,  Distribution of fluorescent Pseudomonas spp. causing grain and sheath discoloration of rice in Latin America
Journal Article 1987

Autor: Zeigler, Robert S. Rubiano Mejía, M.E. Álvarez, E.
Enlace original: https://cgspace.cgiar.org/handle/10568/65734

Investigación en Agricultura
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Zeigler, Robert S. ,  Rubiano Mejía, M.E. ,  Álvarez, E. ,  [Heat and chemical therapy to eradicate Pseudomonas fuscovaginae from rice seed] ,  Heat and chemical therapy to eradicate Pseudomonas fuscovaginae from rice seed
Journal Article 1986

Autor: Zeigler, Robert S. Hoyos, E. Aricapa, María Girlena
Enlace original: https://cgspace.cgiar.org/handle/10568/65736

Investigación en Agricultura
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Zeigler, Robert S. ,  Hoyos, E. ,  Aricapa, María Girlena ,  [Nonrice hosts of the causal agent of bacterial sheath brown rot (BSBR) in Latin America] ,  Nonrice hosts of the causal agent of bacterial sheath brown rot (BSBR) in Latin America
Journal Article 1994

Autor: Correa Victoria, Fernando J. Zeigler, Robert S.

Forty-five international races of Pyricularia grisea, representing all nine race groups, were identified in a "hot spot" breeding site (Santa Rosa) in Colombia, with the largest number included in the IA group. The international race system did not fully describe the virulence spectrum of the iso...

Enlace original: https://cgspace.cgiar.org/handle/10568/43929

Investigación en Agricultura
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Correa Victoria, Fernando J. ,  Zeigler, Robert S. ,  [Pathogenic variability in Pyricularia grisea at a rice blast "hot spot" breeding site in Eastern Colombia] ,  Pathogenic variability in Pyricularia grisea at a rice blast "hot spot" breeding site in Eastern Colombia

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