El objetivo del trabajo fue estudiar cómo los requerimientos foto-térmicos de dos ciclos de madurez, corto y largo, inciden en diferentes épocas de siembra.Se realizaron cuatro experimentos en condiciones de campo en la estación experimental INIA La Estanzuela (Uruguay), todos bajo régimen de riego con el objetivo de neutralizar el efecto más importante y no manejable que incide en los cultivos de verano: el agua disponible para el cultivo. Los experimentos se sembraron en cuatro fechas de siembra: 21 de octubre, 7 de noviembre, 28 de noviembre y 15 de diciembre de 2014.

Abstract A 5-yr retrospective study was conducted to characterize the spectrum of diseases causing mortality in 1301 backyard chickens submitted to the California Animal Health and Food Safety laboratory in Davis, California. Infectious diseases were diagnosed in the majority (60.4%). Viral diseases comprised 50% of the infectious entities, followed by bacterial diseases with an incidence of 39%. Marek's disease in the viral group and Escherichia coli in the bacterial group were the most commonly diagnosed infectious diseases.

Summary: Enterotoxemia caused by Clostridium perfringens type D, sometimes also called overeating disease or pulpy kidney disease, is a prevalent clostridial disease of sheep and goats. This chapter discusses the etiology, epidemiology and pathogenesis, clinical signs, diagnosis, prophylaxis, and treatment of diseases produced by C. perfringens type D. Type D enterotoxemia in sheep is a pure enterotoxemia, with no bacterial invasion of tissues, whereas in goats it may be a pure enterotoxemia, a localized enteric disease, or a combination of both. C.