ABSTRACT.- "Systems thinking" approaches include some techniques and methods developed by social scientists to encourage debate, recognising that their practice is inevitably full of value and that research is a part of intervention. In general, systems theories explain the need to transcend disciplines to increase our understanding of a situation by considering different levels of impact, especially through visualisation tools.

RESUMO.- O objetivo deste trabalho foi avaliar a qualidade de cultivares e clones de morangos e o seu potencial de armazenamento sob refrigeração. O delineamento experimental utilizado foi de blocos ao acaso, com quatro repetições de aproximadamente 150g. Os tratamentos consistiram na avaliação de três cultivares e quatro clones, sendo eles:LBH 15.1.Arazá, SGH 140.3. Guenoa, LBF 236.3 Yvapitá, LBG 121.4, LBK 16.1, LBK 35.1 e LBK 28.1. As avaliações foram realizadas na colheita e dez dias após o armazenamento a -0,5ºC, mais dois dias em temperatura de 20ºC.

Contenido. Síntesis de la Situación Agroclimática de Mayo-- 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 Jun-Jul-Ago elaboradas por el IRI de la Universidad de Columbia. Destacamos para este mes:Previsión de temperaturas mínimas.

ABSTRACT.- The levels of resistance to bacterial wilt (BW) of potatoes caused by Ralstonia solanacearum (Rs) are limited. Solanum commersonii (cmm) is a wild tuber-bearing potato highlighted for its resistance to BW.

ABSTRACT.- Controlling a pest species raises questions about the harmful effects its eradication could cause in ecosystems. Currently, in Uruguay are being analyzed strategies to eradicate the New World Screwworm (NWS), Cochliomyia hominivorax (Diptera:Calliphoridae), an obligatory ectoparasite that causes myiasis in warm-blooded vertebrates, including humans. The loss of a species implies a risk of secondary extinctions and cascading effects that depend on the ecological function of the species and the capacity of the rest of the species with which it interacts to compensate for its loss.

ABSTRACT.- Since 2015, a high mortality rate of strawberry plants has been observed in the north of Uruguay related to crown and root diseases caused by a pathogens complex. In 2016, associated with the death of plants, Cylindrocarpon spp. was isolated with a frequency of 42.4 %, ranking third, preceded by Neopestalotiopsis sp. and Fusarium spp. Aiming to increase the knowledge of the pathogens that integrate the complex, three isolates of Cylindrocarpon spp. were characterized by molecular, morphological and pathogenicity analyses in strawberry plants.

Una de las principales enfermedades que afecta al cultivo de la papa es la marchitez bacteriana, causada por Ralstonia solanacearum. Con este trabajo se busca caracterizar la resistencia a marchitez bacteriana en germoplasma seleccionado del Programa nacional de papa y otros materiales promisorios de diverso origen.

El tizón tardío de la papa, causado por Phytophthora infestans, es la enfermedad más importante del cultivo a nivel mundial. En este trabajo se evaluó la resistencia a P. infestans en una colección núcleo de 43 clones de parientes silvestres.