Evaluación del control de nematodos fitoparásitos en el cultivo de arroz (Oryza sativa L.), utilizando el agente de control biológico Pochonia chlamydosporia (Goddard) zare y gams

Esta investigación se realizó en la finca propiedad del productor Nodier Aparicio, dedicada a la producción de arroz a nivel comercial, la cual está ubicada en Guarumal, Distrito de Alanje, Provincia de Chiriquí. El ensayo se realizó en condiciones de secano favorecido utilizando la variedad de arroz IDIAP 54-05. Se utilizó un Diseño de Bloques Completamente al a Azar (DBCA), para evaluar 5 tratamientos con 3 repeticiones. Los datos obtenidos fueron procesados con el programa SAS CA, 2008. Se evaluó la eficacia biológica del producto Nema-Kell (Pochonia chlamydosporia) sobre el control de nematodos fitoparásitos y su efecto sobre características agronómicas del cultivo de arroz. En la cual se obtuvo una reducción significativa en el número de nematodos fitoparásitos en campo con el producto Nema-Kell SC (Pochonia chlamydosporia) a una dosis de 1 L/ha, pero contrastando con el tratamiento químico Oxate 24 SL (Oxamil) este supera a la formulación biológica. Para las variables agronómicas de altura de planta, longitud de raíces, ahijamiento, número de granos por panícula y rendimiento los mejores resultados se obtuvieron en el tratamiento químico, sin embargo, el producto Nema-Kell SC (Pochonia chlamydosporia) presento resultados positivos y satisfactorios en las variables agronómicas evaluadas

Lectures on Gauged Supergravity and Flux Compactifications

The low-energy effective theories describing string compactifications in the presence of fluxes are so-called gauged supergravities: deformations of the standard abelian supergravity theories. The deformation parameters can be identified with the various possible (geometric and non-geometric) flux components. In these lecture notes we review the construction of gauged supergravities in a manifestly duality covariant way and illustrate the construction in several examples.Comment: 48 pages, lectures given at the RTN Winter School on Strings, Supergravity and Gauge Theories, CERN, January 200

Recent Advances in Graph Partitioning

We survey recent trends in practical algorithms for balanced graph partitioning together with applications and future research directions

A century of trends in adult human height

Being taller is associated with enhanced longevity, and higher education and earnings. We reanalysed 1472 population-based studies, with measurement of height on more than 18.6 million participants to estimate mean height for people born between 1896 and 1996 in 200 countries. The largest gain in adult height over the past century has occurred in South Korean women and Iranian men, who became 20.2 cm (95% credible interval 17.5-22.7) and 16.5 cm (13.3-19.7) taller, respectively. In contrast, there was little change in adult height in some sub-Saharan African countries and in South Asia over the century of analysis. The tallest people over these 100 years are men born in the Netherlands in the last quarter of 20th century, whose average heights surpassed 182.5 cm, and the shortest were women born in Guatemala in 1896 (140.3 cm; 135.8-144.8). The height differential between the tallest and shortest populations was 19-20 cm a century ago, and has remained the same for women and increased for men a century later despite substantial changes in the ranking of countries