ABSTRACT.- Metal nanoparticles are widely studied due to their various applications, such as their potential use in the control of phytopathogens and the promotion of plant growth, with a significant impact on agriculture. Various microbial metabolites are used to reduce and stabilize metals and metal oxides to the nanoscale. In the present work, the biological synthesis of silver and copper oxide nanoparticles using Trichoderma harzianum TA2 is reported.

ABSTRACT.- Insect cuticular lipids, especially epicuticular hydrocarbons (CHC), have a significant role in insect ecology and interactions with other organisms, including fungi. The CHC composition of a specific insect species may influence the outcome of the interaction with a specific fungal strain. Some insects, such as Piezodorus guildinii, have low susceptibility towards fungal infections seemingly due to their CHC composition. The entomopathogenic fungus Beauveria bassiana can assimilate CHC and incorporate them as building blocks via cytochrome P450 monooxygenases (CYPs).

After more than 20 years from its departure point in Beijing 2000, the Symposium lands for the second time in South America, where it will tackle the issues of the current P cycle, in the agroecosystems of the region but also of the world. On one hand, many agroecosystems in the world, such as South American one, face phosphorus scarcity for sustaining economically viable levels of primary and secondary production.

This study investigates the co-inoculation of soybeans with rhizobia and PMB Bacillus strains with and without addition of P fertilizer on plant P uptake and crop yield.

Current sustainability challenges of production systems require comprehensive answers with a multidimensional approach. The objective of this study is to select indicators that allow quantifying the productive-economic, social, and environmental evolution of dairy systems transitioning towards agroecology through a co-innovation approach.

CONTENIDO. -- Síntesis de la situación sgroclimática de enero-- Perspectivas climáticas trimestrales elaboradas por el IRI de la Universidad de Columbia (Más información puede encontrarse en el sitio del IRI:http://www.iri.columbia.edu) -- Índice de vegetación (NDVI) -- Precipitaciones -- Porcentaje de agua disponible (PAD) -- Agua no retenida (ANR) -- Índice de bienestar hídrico (IBH) -- Perspectivas climáticas feb-mar-abr elaboradas por el IRI de la Universidad de Columbia.

El presente trabajo tiene como principal objetivo el desarrollo de una metodología para la identificación de cultivos agrícolas de verano en Uruguay, a partir del uso de imágenes satelitales y aprendizaje automático. Para ello, como insumo se utilizaron bases de datos con información georreferenciada de campo, e imágenes satelitales de libre acceso. De las bases, dos fueron proporcionadas por organizaciones de productores agropecuarios y son de chacras con agricultura, y otras del Ministerio de Ganadería, Agricultura y Pesca de Uruguay (MGAP).