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Lozano, J.C.Zeigler, Robert S.[Methods to screen for resistance against foliar bacterial pathogens]Methods to screen for resistance against foliar bacterial pathogens

Frosi, JFCarmona, PZeigler, Robert S.Pulver, Edward L.[Identificación de Pseudomonas fuscovaginae en Brasil y su posible influencia sobre el manchado del grano]Identificación de Pseudomonas fuscovaginae en Brasil y su posible influencia sobre el manchado del grano

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...


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

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...


Levy, MCorrea Victoria, Fernando J.Zeigler, Robert S.Xu, SHamer, 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

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. ...


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

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...


Martínez Racines, César PompilioCorrea Victoria, Fernando J.Amézquita, María CristinaTulande Valencia, EdgarLema, GZeigler, 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

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...


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

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...


Zeigler, Robert S.Aricapa, María GirlenaHoyos, 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
Roy, A.C.Sarkarung, SurapongZeigler, Robert S.[Nutrition of savanna rice lines under Colombian savanna soil conditions]Nutrition of savanna rice lines under Colombian savanna soil conditions
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

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