Browsing Biología by Author "9de18ec5-29c6-431a-aef1-e7c67e101a26"
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Búsqueda y caracterización de proteínas biopesticidas novedosas a partir de cepas de Bacillus thuringiensis
Arrieta Castro, Glen; Rodríguez Sánchez, César; Víquez, A.; Murillo, L.; Mora Castro, Rebeca; Jiménez Ulate, Franklin; Espinoza Esquivel, Ana Mercedes (1999)En la actualidad se desarrollan y se cultivan comercialmente plantas transgénicas que expresan endotoxinas de Bacillus thuringiensis (Bt) como biopesticida para el control específico de insectos. Sin embargo, se teme que ... -
Characterization of a Bacillus thuringiensis strain collection isolated from diverse Costa Rican natural ecosystems
Arrieta Castro, Glen; Espinoza Esquivel, Ana Mercedes (Universidad de Costa Rica, 2006-03-19)Como los ecosistemas naturales de Costa Rica figuran entre los más diversos del mundo, se propuso aislar la bacteria entomopatógena Bacillus thuringiensis (Bt) con el fin de conformar una colección de cepas y caracterizarlas ... -
Comparación de dos métódos de preparación de tejido para estudiar la anatomía interna del delfácido Tagosodes orizicolus con microscopia de luz y electrónica
Macaya Lizano, Ana Victoria; Pereira Reyes, Reinaldo; Espinoza Esquivel, Ana Mercedes (Universidad de Costa Rica, 1997)Two methods of embedding, sectioning and staining were developed to study the intemal anatomy of the delphacid planthopper Tagosodes orizicolus, one of the most important plagues of rice in Latín America and the only vector ... -
Comparison of three in vitro protocols for direct somatic embryogenesis and plant regeneration of coffea arabica L. CVS. Caturra and Catuaí
Gatica Arias, Andrés Mauricio; Arrieta Espinoza, Griselda; Espinoza Esquivel, Ana Mercedes (Agronomía Costarricense, vol. 31, n. 1, 2007, 2007)Comparación de tres protocolos para la embriogénesis somática directa y la regeneración de plantas de Coffea arabica L. cvs. Caturra y Catuaí in vitro. La presente investigación tuvo como objetivo establecer una metodología ... -
Diversity of Bacillus thuringiensis strains isolated from coffee plantations infested with the coffee berry borer Hypothenemus hampei
Arrieta Castro, Glen; Hernández Soto, Alejandro; Espinoza Esquivel, Ana Mercedes (Universidad de Costa Rica, 2004)The coffee berry borer Hypothenemus hampei Ferrari (Coleoptera: Scolytidae) was first reported infecting Costa Rican coffee plantations in the year 2000. Due to the impact that this plague has in the economy of the country, ... -
External Morphology of Tagosodes orizicolus (Homoptera: Delphacidae) Revealed by Scanning Electron Microscopy
Mora Castro, Rebeca; Retana Salazar, Axel P.; Espinoza Esquivel, Ana Mercedes (2001)A comprehensive analysis of the ultrastructure of the delphacid rice pest Tagosodes orizicolus (Muir) was undertaken using scanning electron microscopy to resolve taxonomic problems in the distinction of females and nymphs ... -
A reliable bioassay procedure to evaluate per os toxicity of Bacillus thuringiensis strains against the rice delphacid, Tagosodes orizicolus (Homoptera: Delphacidae)
Mora Castro, Rebeca; Ibarra, Jorge E.; Espinoza Esquivel, Ana Mercedes (Universidad de Costa Rica, 2007)A reliable bioassay procedure was developed to test ingested Bacillus thuringiensis (Bt) toxins on the rice delphacid Tagosodes orizicolus. Initially, several colonies were established under greenhouse conditions, using ...