Información demográfica y políticas públicas a escala regional y local

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Productividad, escala y aprendizaje en una planta argentina de motores

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Sobre la escala de mortalidad

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El sistema de dirección y planificación de la economia cubana

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Población y pobreza: un modelo a escala de hogar y ejemplo de su aplicación en la República Bolivariana de Venezuela y Brasil

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Áreas de alta vulnerabilidad ambiental en América Latina y el Caribe: una perspectiva regional a escala subnacional

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Escala diagramática para quantificação da severidade de manchas em folhas de Eucalyptus globulus Labill. causadas por Teratosphaeria nubilosa (Cooke) Crous & U. Braun

The leaf spot (Mycosphaerella leaf disease = MLD) caused by Teratosphaeria nubilosa has caused damage in eucalypt plantations in southern and southeastern Brazil. The need to assess the disease in the field to evaluate of this damage, efficiency control, evaluation of germplasm induces to the necessity of having a visual scale for evaluation of disease. The objective was to develop a diagrammatic scale for young leaves and one for adult leaves of Eucalyptus globules for MLD. To do so, the leaves collected in the field were scanned for image analysis. The damaged area, the healthy leaf area and the external area of the same scale RGB (Red, Green, Blue) were determined. Subsequently, it was determinate the levels of severity depending on the sample distribution with seven levels for young leaves and six for adult leaves. For the visual acuity test and validate the scale, the leaves were evaluated for severity, with and without scale. With this proposed scales, the assessors showed good accuracy both for young and adult leaves with R2=0,98 and R2=0,80, respectively. The importance of the development of diagrammatic scales for assessing MLD in eucalyptus must to the fact that allows quantification of the symptoms accurately and precisely.

Focalización y pobreza: nuevas tendencias en la política social. Costa Rica: focalización y seguimiento de programas sociales en gran escala

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