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Search Results: 1 - 10 of 61996 matches for " Luis Roberto Reveles Torres "
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Incidencia y sintomatología de cinco virus en parcelas comerciales de chile seco en Aguascalientes, San Luis Potosí y Zacatecas, México
Velásquez-Valle, Rodolfo;Reveles-Torres, Luis Roberto;Mena-Covarrubias, Jaime;
Revista mexicana de ciencias agrícolas , 2012,
Abstract: world-wide the chili pepper crop is affected by more than 60 viral diseases, although very little is known about them in the area of dry pepper plantation in northern-central mexico. consequently, the aims of this work were to identify the presence of the virus and the associated symptoms in commercial dry pepper fields of the states of zacatecas, san luis potosí, and aguascalientes, mexico. mirasol and ancho pepper plants were sampled and the presence of symptoms such as dwarfing, chlorosis, leaf deformation, defoliation, vascular necrosis and joined branches, were recorded. samples were analyzed using das-elisa with the antisera of the tobacco mosaic virus (tobacco mosaic virus: tmv), cucumber mosaic virus (cucumber mosaic virus: cmv), potato virus y (potato virus y: pvy), pepper mottle virus (pepper mottle virus: pepmov), and tobacco etch virus (tobacco etch virus: tev). these viruses were identified in pepper plants collected in dry pepper fields located in the three states mentioned earlier.
Incidencia y sintomatología de cinco virus en parcelas comerciales de chile seco en Aguascalientes, San Luis Potosí y Zacatecas, México Incidence and symptomatology of five viruses in commercial dry chili pepper fields in Aguascalientes, San Luis Potosí, and Zacatecas, Mexico
Rodolfo Velásquez-Valle,Luis Roberto Reveles-Torres,Jaime Mena-Covarrubias
Revista mexicana de ciencias agrícolas , 2012,
Abstract: A nivel mundial el cultivo de chile es afectado por más de 60 enfermedades virales; sin embargo, poco se conoce acerca de ellas en el área productora de chile seco del norte centro de México por lo que el objetivo del presente trabajo consistió en detectar la presencia y sintomatología de cinco virus en parcelas comerciales de chile seco en los estados mencionados. Plantas de chile de los tipos mirasol y ancho fueron muestreadas y se anotó la presencia de síntomas como enanismo, clorosis, deformación de hojas, defoliación, necrosis vascular y ramas unidas. Las muestras fueron analizadas mediante la técnica DAS-ELISA empleando los antisueros para el virus del mosaico del tabaco (Tobacco mosaic virus: TMV), mosaico del pepino (Cucumber mosaic virus: CMV), Y de la papa (Potato virus Y: PVY), moteado del chile (Pepper mottle virus: PepMoV) y jaspeado del tabaco (Tobacco etch virus: TEV). Esos virus fueron identificados en plantas de chile colectadas en las parcelas comerciales de chile seco de los tres estados antes mencionados. World-wide the chili pepper crop is affected by more than 60 viral diseases, although very little is known about them in the area of dry pepper plantation in northern-central Mexico. Consequently, the aims of this work were to identify the presence of the virus and the associated symptoms in commercial dry pepper fields of the states of Zacatecas, San Luis Potosí, and Aguascalientes, Mexico. Mirasol and ancho pepper plants were sampled and the presence of symptoms such as dwarfing, chlorosis, leaf deformation, defoliation, vascular necrosis and joined branches, were recorded. Samples were analyzed using DAS-ELISA with the antisera of the tobacco mosaic virus (Tobacco mosaic virus: TMV), cucumber mosaic virus (Cucumber mosaic virus: CMV), potato virus Y (Potato virus Y: PVY), pepper mottle virus (Pepper mottle virus: PepMoV), and tobacco etch virus (Tobacco etch virus: TEV). These viruses were identified in pepper plants collected in dry pepper fields located in the three states mentioned earlier.
Impacto económico, social y ambiental del manejo integral de huertos de durazno en Zacatecas
Sánchez Toledano, Blanca Isabel;Amador Ramírez, Mario Domingo;Rumayor Rodríguez, Agustín Fernando;Reveles Torres, Luis Roberto;
Revista mexicana de ciencias agrícolas , 2012,
Abstract: assessing the impacts of technologies generated by agricultural research is an important issue for inifap. initially, this assessment was referred almost exclusively to economic impacts, but in recent times social and environmental dimensions have been incorporated, as a result of concerns about the sustainability of production systems. in 2009, we conducted a series of surveys to the cooperating producers who participated in a technology transfer project for peach, where primary information was gathered on the economic, social and environmental impact on model gardens, promoted for 6 years in a technology transfer project. in addition, a specialized software was used to estimate the economic benefit to society of investment in the project, assuming the adoption of the technology in an area of 5 hectares, and expecting an average yield of 12 tons per hectare. the estimation of the economic return of the research was carried out by calculating the indicators of convenience; in this case tir was estimated at 63.69%, a van of $ 23.5 million pesos and a benefit /cost ratio of 7.02, which means that for every peso invested in the generation and dissemination of this practice, the country made a $7 profit.
Impacto económico, social y ambiental del manejo integral de huertos de durazno en Zacatecas Economic, social and environmental impact of the integral management of peach orchards in Zacatecas
Blanca Isabel Sánchez Toledano,Mario Domingo Amador Ramírez,Agustín Fernando Rumayor Rodríguez,Luis Roberto Reveles Torres
Revista mexicana de ciencias agrícolas , 2012,
Abstract: La evaluación de los impactos derivados de las tecnologías generadas por la investigación agropecuaria es un tema importante para el INIFAP. Inicialmente, esta evaluación estaba referida casi en forma exclusiva a los impactos económicos; sin embargo, en estos últimos tiempos se han incorporado las dimensiones social y ambiental, en consecuencia de la preocupación por la sostenibilidad de los sistemas de producción. En 2009, se aplicó una serie de encuestas a los productores cooperantes, participantes de un proyecto de transferencia tecnológica en durazno, donde se recabó información primaria sobre el impacto económico, social y ambiental en huertos modelo promovido a través de 6 a os en un proyecto de transferencia tecnológica. Por otro lado, se utilizó un software especializado para estimar el beneficio económico a la sociedad de la inversión realizada en el proyecto, asumiendo la adopción de la tecnología en una superficie de 5 mil hectáreas y esperando un rendimiento promedio de 12 toneladas por hectárea. La estimación del retorno económico de la investigación se realizó a través del cálculo de indicadores de conveniencia, en este caso se estimó una TIR de 63.69%, un VAN de $23.5 millones de pesos y una relación beneficio/costo de 7.02, esto significa que por cada peso invertido en la generación y difusión de esta práctica, el país obtuvo $7 en beneficio económico. Assessing the impacts of technologies generated by agricultural research is an important issue for INIFAP. Initially, this assessment was referred almost exclusively to economic impacts, but in recent times social and environmental dimensions have been incorporated, as a result of concerns about the sustainability of production systems. In 2009, we conducted a series of surveys to the cooperating producers who participated in a technology transfer project for peach, where primary information was gathered on the economic, social and environmental impact on model gardens, promoted for 6 years in a technology transfer project. In addition, a specialized software was used to estimate the economic benefit to society of investment in the project, assuming the adoption of the technology in an area of 5 hectares, and expecting an average yield of 12 tons per hectare. The estimation of the economic return of the research was carried out by calculating the indicators of convenience; in this case TIR was estimated at 63.69%, a VAN of $ 23.5 million pesos and a benefit /cost ratio of 7.02, which means that for every peso invested in the generation and dissemination of this practice, the country made a
Presencia de Circulifer tenellus Baker y Beet mild curly top virus en maleza durante el invierno en el centro norte de México Circulifer tenellus Baker and Beet mild curly top virus presence in weeds during the winter in north-central Mexico
Rodolfo Velásquez-Valle,Luis Roberto Reveles-Torres,Mario Domingo Amador-Ramírez,María Mercedes Medina-Aguilar
Revista mexicana de ciencias agrícolas , 2012,
Abstract: Una de las enfermedades más importantes del chile para secado en el norte centro de México es la denominada amarillamientos del chile. Existe poca información acerca de la interacción entre el vector (Circulifer tenellus Baker), el Beet mild curly top virus y la maleza durante el invierno en esta región, consecuentemente el objetivo del trabajo fue identificar maleza de invierno que sirve como refugio para el vector y hospedero del virus en esta región. Entre enero y marzo de 2011 se muestrearon 26 manchones de maleza en los estados de Aguascalientes y Zacatecas. Se capturaron adultos de C. tenellus en 69.2% de los manchones de maleza muestreados; la mayoría (75.5%) de los especímenes eran hembras. El Beet mild curly top fue identificado sólo 15.4% de los sitios de muestreo infectando especies de maleza como Eruca sativa, Reseda sp., Chenopodium sp. y Solanum rostratum L. One of the most important diseases of chili pepper for drying in the north-central Mexico is called yellowing of chili. There is little information about the interaction between the vector (Circulifer tenellus Baker), the Beet mild curly top virus and weeds during the winter in this region; therefore, the objective was to identify winter weeds that serve as are fuge for the vector and host of the virus in this region. Between January and March, 2011, 26 patches of weed were sampled in Aguascalientes and Zacatecas. Adult C. tenellus were captured in 69.2% of the weed sampled patches; most of the specimens were females (75.5%). Beet mild curly top was identified in only 15.4% of the sampling sites, infecting weed species suchas Eruca sativa, Reseda sp., Chenopodium sp. and Solanum rostratum L.
Introducción de floración en Tiquisque (Xanthosoma ssp) en cinco regiones de Costa Rica
Francisco Soborío,Luis Gómez,Sergio Torres,Roberto Valverde
Agronomía Costarricense , 2000,
Abstract:
Comportamiento en el campo de siete genotipos de tiquisque (Xanthosoma spp) propagados in vitro
Sergio Torres,Luis Gómez,Francisco Saborío,Roberto Valverde
Agronomía Costarricense , 2000,
Abstract:
Aspectos reproductivos de una población del charal Menidia jordani (Woolman) del Lago de Metztitlán, Hidalgo
Ibá?ez, Ana Laura;García Calderón, José Luis;Torres-Orozco B., Roberto;
Hidrobiológica , 2008,
Abstract: menidia jordani is a silverside species naturally distributed in the mexican and lerma drainage areas and has in metztitlán lake it most eastern area of distribution in a lentic system. the analysis of the reproductive biology of this species showed that even metztitlán lake is the extreme frontier of their distribution conserved its reproduction phenology in relation with other populations. the highest standard length was 58 mm and the length at first sexual maturation was at 43 mm. sexual ratio inequality was manifested in mayor proportion of females during all collects with exception of january of 2004.
Efecto del nivel proteico de la dieta sobre el desarrollo de juveniles de la langosta australiana Cherax quadricarinatus (Decapoda: Parastacidae)
Campa?a Torres,Alfredo; Villarreal Colmenares,Humberto; Civera Cerecedo,Roberto; Martínez Córdova,Luis Rafael;
Revista de Biología Tropical , 2003,
Abstract: an experimental study was conducted from october to december, 1999, in the aquaculture facilities of cibnor sc, at la paz, bcs. to evaluate the effect of diet protein level on the productive response, in juveniles of the australian lobster, cherax quadricarinatus, diets with four levels of crude protein (20.45, 28.25, 37.33 y 45.44%), were formulated and probed. growth, grow rate, survival, biomass and food conversion rate were greater in juveniles fed with diets of 37.33 and 45.44% of crude protein. it is concluded that diet protein level affects the productive response of redclaw and a level of 37% of crude protein in the diet is enough to obtain acceptable results
Aspectos reproductivos de una población del charal Menidia jordani (Woolman) del Lago de Metztitlán, Hidalgo Reproductive features of the "charal" Menidia jordani (Woolman) from Lake of Metztitlán, Hidalgo
Ana Laura Ibá?ez,José Luis García Calderón,Roberto Torres-Orozco B.
Hidrobiológica , 2008,
Abstract: Menidia jordani es una especie de charal que se distribuye de manera natural en las cuencas de México y del Río Lerma, y tiene en el Lago de Metztitlán, Hidalgo, el límite oriental de su área de distribución en ambientes lénticos. Los resultados del análisis de algunos aspectos de la biología reproductiva de la población de M. jordani que habita en el Lago de Metztitlán mostraron que, a pesar de vivir en un ambiente ubicado en la frontera de su área de distribución, conserva una fenología reproductiva similar a la de otras poblaciones. La máxima longitud estándar observada fue de 58 mm y la talla a la primera madurez sexual fue de 43 mm. Una notable desigualdad en la proporción de sexos a favor de las hembras se observó en todas las colectas, con excepción de la de enero del 2004. Menidia jordani is a silverside species naturally distributed in the Mexican and Lerma drainage areas and has in Metztitlán Lake it most eastern area of distribution in a lentic system. The analysis of the reproductive biology of this species showed that even Metztitlán Lake is the extreme frontier of their distribution conserved its reproduction phenology in relation with other populations. The highest standard length was 58 mm and the length at first sexual maturation was at 43 mm. Sexual ratio inequality was manifested in mayor proportion of females during all collects with exception of January of 2004.
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