SUMMARY. Togninia minima (anamorph Phaeoacremonium aleophilum) is one of the main fungi responsible for trunk diseases of grapevines and other woody hosts worldwide. Sequences of protein-coding genes of isolates from countries in different continents have been published, presenting a useful resource for examination of the diversity and spatial distribution of T. minima genotypes.

ARROZ Mejoramiento Épocas de siembra. Ensayos varietales. Ensayos regionales varietales. Respuesta varietal a nitrògeno. Convenio de Cooperación Técnico Agrícola con la República de China. Situación actual y perspectivas del mejoramiento genético de arroz en Uruguay. Manejo Ensayos regionales de fertilización. Manejo de nitrógeno. Discusión general de fertilización. Tesis de graduación. Ensayos especiales. Control de maleza. Fitopatologìa Camas de infección. Propagaciòn y daño provocado por enfermedades del tallo. Evaluación de fungicidas a campo.

ARROZ Mejoramiento Épocas de siembra. Ensayos varietales. Ensayos regionales varietales. Respuesta varietal a nitrògeno. Convenio de Cooperación Técnico Agrícola con la República de China. Situación actual y perspectivas del mejoramiento genético de arroz en Uruguay. Manejo Ensayos regionales de fertilización. Manejo de nitrógeno. Discusión general de fertilización. Tesis de graduación. Ensayos especiales. Control de maleza. Fitopatologìa Camas de infección. Propagaciòn y daño provocado por enfermedades del tallo. Evaluación de fungicidas a campo.

ABSTRACT. Chemical communication among kin bacteria modulates diverse activities. Despite the general consensus that signaling among non-kin organisms is likely to influence microbial behavior, there is limited information on the potential for microbial interactions to alter microbial phenotypes in natural habitats. We explored patterns of interaction that alter inhibitory phenotypes among Streptomyces isolates from distinct communities.

ABSTRACT. Haemonchus contortus is a blood-sucking parasite causing the presence of faecal occult blood (FOB). The objective was to study three different FOB tests in order to have a new indicator of H. contortus infection in sheep that could be included in the genetic evaluation system as an alternative selection criterion to faecal worm egg count (FEC). A total of 29 Corriedale lambs were experimentally infected with 10.000 larvae of H. contortus.

ABSTRACT. The objective of the present study was to characterise the behaviour of Holstein steers in three different production systems. Forty-eight castrated Holstein males were randomly divided into three groups and allocated to the following three outdoor treatments:(T1) animals confined in a yard with an area of 210 m2, (T2) animals confined in a similar-sized yard but with 6 h of access to a pasture plot, (T3) animals maintained throughout the experiment on a pasture plot.

ABSTRACT. Soil quality improvement by reducing soil tillage is one tool of sustainable agriculture. Covers crops left on soil surface prevent soil erosion, reduces evapotranspiration and weeds, and improves soil infi ltration; key factors for a successful vegetable production on heavy clay soils. The objective of this research was to evaluate the effect of cover crops plus ridge tillage on soil water content, soil, physico-chemical and biological properties and on vegetable yield.

RESUMEN. La solarización es la cobertura hermética del suelo, humedecido a capacidad de campo con polietileno transparente ultravioleta (UV) durante un tiempo variable. Mediante la captura de energía solar se aumenta la temperatura del suelo, perjudicando las semillas de malezas anuales. Esta técnica fue evaluada en almácigos de cebolla con excelentes resultados por INIADIGEGRA-FAGRO en 2005-2006 en tres localidades.

ABSTRACT. In two consecutive years (2008 and 2009), ewe lambs that had not attained puberty were allocated to one of two groups (Unteased [n=50 in both years] or Teased [n = 50 in 2008 and n=49 in 2009]) for 17 days (D1 to D17). In 2009, the ovaries of all ewe lambs were examined on D5, D9 and D12 by transrectal ultrasonography. From D18 to D28, crayon-harnessed teaser rams were introduced to both groups each year. In both years a greater proportion (P 0.05). We have demonstrated that teasing advances the onset of puberty.