Consulta: subjectFacets:"Leaf wetness duration"
Registros recuperados: 3
Data/hora: 06/06/2024 08:13:56

Climatic risk of grape downy mildew (Plasmopara viticola) for the State of São Paulo, Brazil
Provedor de dados: 63
Autores: 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

Agrometeorology and plant disease management: a happy marriage
Provedor de dados: 63
Autores: Gillespie,Terry James; Sentelhas,Paulo Cesar.
Many plant disease outbreaks are triggered by suitably warm temperatures during periods of leaf wetness. Measurements or estimations of leaf wetness duration provided by Agrometeorologists have allowed Plant Pathologists to devise weather timed spray schemes which often reduce the number of sprays required to control plant diseases, thus lowering costs and benefitting the environment. In the near future, tools such as numerical weather models with small grid spacings, and improved weather radar, are expected to reduce the need for tight networks of surface observations. The weather models will also provide growers with forecast warnings of potential upcoming disease outbreaks, which will further enhance the contribution of agrometeorology to plant disease...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Leaf wetness duration; Temperature; Disease warning systems.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162008000700012

Microclimate and ramulosis occurrence in a cotton crop under three plant population densities in Southern Brazil
Provedor de dados: 114
Autores: Monteiro,J. E. B. A.; Sentelhas,P. C.; Chiavegato,E. J.
This study aimed to evaluate crop microclimate and its influence on ramulosis disease in a cotton crop conducted in three population densities. The experiment was carried out in Piracicaba, state of São Paulo, Brazil, where the genotypes IAC 23 and Coodetec 401 were sowed with the following plant population densities: 55,000; 111,000; and 166,000 plants per hectare. To start the epidemic process, a conidia suspension of Colletotrichum gossypii var. cephalosporioides was inoculated in the crop at 30 and 45 days after sowing. The weather variables, air temperature, relative humidity and leaf wetness duration, were recorded with an automatic weather station located at the experimental area and with six micro-stations located within the crop canopy (three in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Air temperature; Leaf wetness duration; Colletotrichum gossypii var. cephalosporioides; Yield; Disease intensity.
Ano: 2006
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1668-298X2006000200001