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| Registros recuperados: 31 | |
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| Lulu,Jorge; Sentelhas,Paulo Cesar; Pedro Júnior,Mário José; Pezzopane,José Ricardo Macedo; Blain,Gabriel Constantino. |
| Leaf wetness duration (LWD) is a key parameter in agrometeorology because it is related to plant disease occurrence. As LWD is seldomly measured in a standard weather station it must be estimated to run warning systems for schedule chemical disease control. The objective of the present study was to estimate LWD over turfgrass considering different models with data from a standard weather station, and to evaluate the correlation between estimated LWD over turfgrass and LWD measured in a 'Niagara Rosada' vineyard, cultivated in a hedgerow training system, in Jundiaí, São Paulo State, Brazil. The wetness sensors inside the vineyard were located at the top of the plants, deployed at an inclination angle of 45º and oriented southwest, with three replications.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Vitis labrusca; LWD estimate; Relative humidity; Dew point temperature. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162008000700004 |
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| Hamada,Emília; Ghini,Raquel; Fernandes,Jeferson Lobato; Pedro Júnior,Mário José; Rossi,Paulo. |
| One of the main factors influencing the occurrence of plant diseases is the leaf wetness duration (LWD). However, this climatic parameter is not generally and systematically recorded at meteorological stations, and the alternative to obtain an estimate for LWD is the use of mathematical models. The objective of this study was to estimate LWD for the State of São Paulo, on the basis of the number of hours with relative humidity equal to or higher than 90%, and also plot them on a map with help of the Geographical Information System (GIS) tool. Using daily relative humidity data from ten meteorological stations of the State, for six years, adjustment equations were obtained for different LWD periods (hours day-1) (R² from 0.58 to 0.81) and of number of days... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Plant diseases; Relative humidity; Geographical Information System; Regression equation. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162008000700006 |
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| Hamada,Emília; Ghini,Raquel; Rossi,Paulo; Pedro Júnior,Mário José; Fernandes,Jeferson Lobato. |
| Viticulture in Brazil has been growing in importance in recent years. In the State of São Paulo, a significant percentage of the production is basically destined to in natura consumption and, more recently, much effort has been made by institutions to revitalize the viticulture in the State. Among fungal diseases, the downy mildew (Plasmopara viticola) is one of the main diseases affecting this crop in Brazil, with extreme damage effects on its production. The objective of this study was to estimate the incidence of the downy mildew on grape under the climatic conditions of the State of São Paulo, based on a mathematical model and using Geographical Information System - GIS tools. The study considered the months from September to April, a period in which... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Vitis spp.; Geographical Information System; Temperature; Relative humidity; Leaf wetness duration. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162008000700010 |
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| Toledo, Vagner de Alencar Arnaut de; UEM; Neves, Carolina Antunes; Copebrás; Alves, Eloi Machado; UEM; Oliveira, Jussara Ricardo de; Universidade Paranaense; Ruvolo-Takasusuki, Maria Cláudia Colla; UEM; Faquinello, Patrícia; UEM. |
| O objetivo foi avaliar o efeito da suplementação proteica sobre a produção de geleia real em colônias de Apis mellifera e correlacionar esta produção com as variáveis climáticas. Os tratamentos foram: colônias que receberam uma ração elaborada com 35% de proteína; colônias que receberam suplemento proteico comercial com 35% de proteína bruta e colônias que não receberam ração proteica. Não houve diferença (p > 0,05) entre os tratamentos para as variáveis de produção. As médias foram: quantidade de larvas aceitas, 8,56 ± 6,76; porcentagem de aceitação, 29,20 ± 22,03%; quantidade de geleia real produzida por colônia, 1,83 ± 0,82 g e quantidade produzida por cúpula, 213,58 ± 108,36 mg. A precipitação pluviométrica não influenciou (p > 0,05) a produção... |
| Tipo: Pesquisa de campo |
Palavras-chave: 5.04.05.00-4 Apis mellifera; Nutrição de abelhas; Proteína; Umidade relativa; Temperatura 5.04.05.02-0 Apis mellifera; Honeybee nutrition; Protein; Relative humidity; Temperature. |
| Ano: 2009 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/6836 |
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| Garbaba, Chemeda Abedeta. |
| Mycotoxin-producing fungal growth commonly reported from traditional maize storage system in southwestern Ethiopia. Un-safe moisture content at loading and non-climatically controlled nature of gombisa results in mycoflora growth and development on maize in storage system. Therefore, this paper was aimed to develop a photovoltaic driven ventilation system fitted to modified gomibsa for natural air in-bin drying of on-cobs-maize and increase the shelf life of the product. Modified gombisa was constructed from locally available materials for the current experiment. An appropriate fan type and size, humidistat set at >70% and two 20 Wp photovoltaic panels were used for ventilation purpose, fan control and power the fan, respectively. In total 1.76 m3 of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Modified gombisa; Maize in cobs; Temperature; Relative humidity; Ventilation system.. |
| Ano: 2018 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4850 |
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| Moya,Róger; Solano,Marco. |
| In Costa Rica, there has been a growing interest to use pineapple fiber from plant, for which current processes need to be improved or new processes need to be developed, with emphasis on drying methods. This work presents the design and evaluation of the behavior of a prototype portable solar dryer in four sites of Costa Rica. The design describes the main parts of the dryer, as well as how they were constructed. The behavior was evaluated according to temperature and relative humidity inside e outside the chamber, and the influence of direct and indirect solar radiation. In order to achieve improved dryer efficiency, a dehumidifier was used to control relative humidity, and a heating system was implemented during the hours of low temperature, low solar... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Air drying; Relative humidity; Moisture content; Temperature; Solar radiation. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542012000600009 |
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| Registros recuperados: 31 | |
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