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	Provedor de dados Scientia Agricola (2) REA (2) Autor Lulu,Jorge (2) Santos,Eduardo Alvarez (2) Sentelhas,Paulo Cesar (2) Alves,Karina A. (1) Angelocci,Luiz Roberto (1) Blain,Gabriel C. (1) Genta,Werner (1) Gillespie,Terry James (1) Griesang,Fabiano (1) Higashibara,Leandro R. (1) Monteiro,José Eduardo Boffino Almeida (1) Pedro Júnior,Mário J. (1) Pezzopane,José Eduardo Macedo (1) Pezzopane,José R. M. (1) Saab,Otavio J. G. Abi (1) Sentelhas,Paulo C. (1) Mais... Palavra-chave Dew (4) Rain (2) Air assistance (1) Air-assisted sprayer (1) Application technology (1) Deployment angle (1) Disease-warning systems (1) Electrical conductivity (1) Electronic sensors (1) Flat plate wetness sensor (1) Microclimate (1) Plant disease (1) Vitis vinifera (1) Warning systems (1) Mais... Tipo do documento Info:eu-repo/semantics/article (4) Ano 2017 (1) 2008 (3) País Brazil (4) Idioma Inglês (4)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 4 Primeira ... 1 ... Última PESTICIDES DEPOSITION IN VINEYARDS ON DIFFERENT CONDITIONS OF LEAF WETNESS REA Saab,Otavio J. G. Abi; Griesang,Fabiano; Alves,Karina A.; Higashibara,Leandro R.; Genta,Werner. ABSTRACT The high susceptibility to diseases of fine table grapes cultivars demand intensive use of pesticides, and the presence of water on the leaf surface can worsen the deposition of these products. The objective of this study was to evaluate the spray deposition in vine leaves in different conditions of leaf wetness, and test the effectiveness of an artificial ventilation method to remove water on the leaf surface. We evaluated the spray deposition in vine applied over: wet canopy (presence of high leaf wetness); canopy dried artificially (dried with air jet from air-assisted sprayer, wind speed of 25 km h−1) and canopy dried naturally (naturally dried leaves and free of water on its surface). Saline marker was used in the spray and the deposition on... Tipo: Info:eu-repo/semantics/article Palavras-chave: Air assistance; Air-assisted sprayer; Application technology; Dew; Electrical conductivity; Vitis vinifera. Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000200286 Spatial variability of leaf wetness duration in a 'Niagara Rosada' vineyard REA Lulu,Jorge; Sentelhas,Paulo C.; Pedro Júnior,Mário J.; Pezzopane,José R. M.; Blain,Gabriel C.. Despite considerable efforts to develop accurate electronic sensors to measure leaf wetness duration (LWD), little attention has been given to studies about how is LWD variability in different positions of the crop canopy. In order to evaluate the influence of 'Niagara Rosada' (Vitis labrusca) grapevine structure on the spatial variability of LWD, the objective of this study was to determine the canopy position of the ‘Niagara Rosada’ table grape with longer LWD and its correlation with measured standard LWD over turfgrass. LWD was measured in four different canopy positions of the vineyard (sensors deployed at 45º with the horizontal): at the top of the plants, with sensors facing southwest and northeast (Top-SW and Top-NE), and at the grape bunches... Tipo: Info:eu-repo/semantics/article Palavras-chave: Dew; Rain; Flat plate wetness sensor. Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162008000100011 Performance of cylindrical leaf wetness duration sensors in a tropical climate condition Scientia Agricola Santos,Eduardo Alvarez; Sentelhas,Paulo Cesar; Gillespie,Terry James; Lulu,Jorge. Leaf wetness duration (LWD) measurements are required for disease warning in several agricultural systems, since it is an important variable for the diagnose of plant disease epidemiology. The cylindrical sensor is an inexpensive and simple electronic LWD sensor initially designed to measure this variable for onions, however some studies show that it may be helpful for standard measurements in weather stations and also for different crops. Therefore, the objective of this study was to assess their performance under tropical climate conditions, in Brazil, having as standard measurements those obtained by flat plate sensors, which have presented very good performance when compared with visual observations. Before field assessments, all LWD sensors used in... Tipo: Info:eu-repo/semantics/article Palavras-chave: Deployment angle; Electronic sensors; Dew; Rain; Disease-warning systems. Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162008000700003 Spatial variability of leaf wetness duration in cotton, coffee and banana crop canopies Scientia Agricola Santos,Eduardo Alvarez; Sentelhas,Paulo Cesar; Pezzopane,José Eduardo Macedo; Angelocci,Luiz Roberto; Monteiro,José Eduardo Boffino Almeida. Despite the importance of leaf wetness duration for plant disease epidemiology, there has been little attention paid to research on how its variability relates to different cropping situations. The objective of this study was to evaluate the spatial variability of leaf wetness duration (LWD) in three crops, comparing these measurements with turfgrass LWD, obtained in a standard weather station. LWD was measured by electronic sensors in three crops with different canopy structures and leaf area: cotton, coffee and banana. For the cotton crop, cylindrical sensors were deployed at the lower third and on the top of the canopy, facing southwest. For the coffee crop, flat plate sensors were installed in the lower third of the canopy facing northeast and... Tipo: Info:eu-repo/semantics/article Palavras-chave: Dew; Microclimate; Plant disease; Warning systems. Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162008000700005 Registros recuperados: 4 Primeira ... 1 ... Última

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