Siembras en el tapiz: consideraciones generales y estado actual de la información en la zona de suelos sobre Cristalino
Potential botanical pesticides from Asteraceae essential oils for tomato production: Activity against whiteflies, plants and bees.
ABSTRACT. Tomato (Solanum lycopersicum L.) crops are affected by a diversity of pests. Among these pests, the whitefly Trialeurodes vaporariorum (Westwood) (Hemiptera: Aleyrodidae) and the leaf miner, Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae) cause large yield losses. The effects from these insects are often minimized by applying synthetic pesticides, although these have many drawback.
Competition for oestrous ewes between rams reared by their mothers or artificially reared: Effects on sexual behaviour and testosterone and cortisol serum concentrations.
A b s t r a c t: The objective of this study was to determine how the social competition for an oestrous ewe affects the sexual behaviour and the endocrine response in two groups of rams, one reared by their mothers and another artificially reared. Thus, we compared the sexual behaviour and testosterone and cortisol changes in each group of rams in competitive and non-competitive tests, both during the first and second breeding seasons.
Resultados experimentales de la evaluación nacional de cultivares de trigo ciclo largo: período 2016.
EQUIPOS DE TRABAJO INIA Evaluación de Cultivares Ing. Agr. (PhD.) Marina Castro Evaluación de Cultivares Ing. Agr. Santiago Manasliski Ensayos regionales Young Téc. Sist. Int. Gan. Máximo Vera Asistente de Investigación Beatriz Castro Valeria Cardozo Asistentes de Información y Proc. de datos Protección Vegetal Ing. Agr. (Ph.D.) Silvia Pereyra (Fitopatología) Lic. Biol. (Ph.D.) Gustavo Azzimonti (Fitopatología) Ing. Agr. (Ph.D.) Silvia Germán (Mej. por resistencia) Tec. Agrop. Richard García (Mej. por resistencia) Tec. Lech.
Persistence of tall fescue in a subtropical environment: tiller survival over summer in response to flowering control and nitrogen supply.
ABSTRACT. Enhancing pasture persistence is crucial to achieve more sustainable grass-based animal production systems. Although it is known that persistence of perennial ryegrass is based on a high turnover of tillers during late spring and summer, little is known about other forage species, particularly in subtropical climates. To address this question, this study evaluated survival of grazed tall fescue tillers growing in a subtropical climate.