Physical characteristics of oily spraying liquids and droplets formed on coffee leaves and glass surfaces

Detalhes bibliográficos
Autor(a) principal: Decaro, Sergio T.
Data de Publicação: 2015
Outros Autores: Ferreira, Marcelo Da C., Lasmar, Olinto
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1590/1809-4430-Eng.Agric.v35n3p588-600/2015
http://hdl.handle.net/11449/211226
Resumo: The physical characteristics of a spray liquid are important in getting a good droplet formation and control efficiency over a particular target. As a function of these characteristics, it is possible to decipher which is the best adjuvant based on the respective concentration used during the spray. Therefore, ten spraying liquids were prepared, which varied in concentrations of pesticide lufenuron + profenofos, mineral oil, water and manganese sulfate. Pendant droplets formed from these mixtures were measured to examine their impact on surface tension. Droplets were applied to the surface of coffee leaves and the surface tension, contact angle formed and the leaf area wetted by the droplet, were measured. A smooth glass surface was taken as a comparative to the coffee leaves. The highest concentrations of oil resulted in lower surface tension, smaller contact angles of droplets on leaf surfaces and larger areas wetted by the droplets. Both surfaces showed hydrophilic behavior.
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spelling Physical characteristics of oily spraying liquids and droplets formed on coffee leaves and glass surfacesCaracterísticas físicas de caldas oleosas e de gotas formadas em superfície de folhas de café e de vidrosurface tensioncontact anglewetted areaoiltensão superficialângulo de contatoárea molhadaóleoThe physical characteristics of a spray liquid are important in getting a good droplet formation and control efficiency over a particular target. As a function of these characteristics, it is possible to decipher which is the best adjuvant based on the respective concentration used during the spray. Therefore, ten spraying liquids were prepared, which varied in concentrations of pesticide lufenuron + profenofos, mineral oil, water and manganese sulfate. Pendant droplets formed from these mixtures were measured to examine their impact on surface tension. Droplets were applied to the surface of coffee leaves and the surface tension, contact angle formed and the leaf area wetted by the droplet, were measured. A smooth glass surface was taken as a comparative to the coffee leaves. The highest concentrations of oil resulted in lower surface tension, smaller contact angles of droplets on leaf surfaces and larger areas wetted by the droplets. Both surfaces showed hydrophilic behavior.As características físicas da calda de pulverização são importantes para que haja boa formação de gotas e eficiência de controle sobre determinado alvo. Em função dessas características, pode-se decidir sobre qual o melhor adjuvante, em sua respectiva concentração, poderá ser utilizado durante a pulverização. Para tanto, foram preparadas dez caldas fitossanitárias em que variaram as concentrações do inseticida lufenuron + profenofós, óleo mineral, água e sulfato de manganês. Gotas pendentes formadas a partir dessas misturas foram medidas em sua tensão superficial. Aplicaram-se gotas sobre a superfície de folhas de café e foram medidos a tensão superficial, o ângulo de contato formado e a área da folha molhada pela gota. Uma superfície lisa de vidro foi tomada como comparativo às folhas de café. As maiores concentrações de óleo resultaram em menores valores de tensão superficial, menores ângulos de contato de gotas com a superfície foliar e maiores áreas molhadas pelas gotas. Ambas as superfícies mostraram-se hidrofílicas.FCAV, Departamento de FitossanidadeAssociação Brasileira de Engenharia AgrícolaFCAVDecaro, Sergio T.Ferreira, Marcelo Da C.Lasmar, Olinto2021-07-14T10:21:12Z2021-07-14T10:21:12Z2015info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article588-600application/pdfhttp://dx.doi.org/10.1590/1809-4430-Eng.Agric.v35n3p588-600/2015Engenharia Agrícola. Associação Brasileira de Engenharia Agrícola, v. 35, n. 3, p. 588-600, 2015.1809-44300100-6916http://hdl.handle.net/11449/21122610.1590/1809-4430-Eng.Agric.v35n3p588-600/2015S0100-69162015000300588S0100-69162015000300588.pdfSciELOreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengEngenharia Agrícolainfo:eu-repo/semantics/openAccess2023-10-07T06:02:01Zoai:repositorio.unesp.br:11449/211226Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462023-10-07T06:02:01Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Physical characteristics of oily spraying liquids and droplets formed on coffee leaves and glass surfaces
Características físicas de caldas oleosas e de gotas formadas em superfície de folhas de café e de vidro
title Physical characteristics of oily spraying liquids and droplets formed on coffee leaves and glass surfaces
spellingShingle Physical characteristics of oily spraying liquids and droplets formed on coffee leaves and glass surfaces
Decaro, Sergio T.
surface tension
contact angle
wetted area
oil
tensão superficial
ângulo de contato
área molhada
óleo
title_short Physical characteristics of oily spraying liquids and droplets formed on coffee leaves and glass surfaces
title_full Physical characteristics of oily spraying liquids and droplets formed on coffee leaves and glass surfaces
title_fullStr Physical characteristics of oily spraying liquids and droplets formed on coffee leaves and glass surfaces
title_full_unstemmed Physical characteristics of oily spraying liquids and droplets formed on coffee leaves and glass surfaces
title_sort Physical characteristics of oily spraying liquids and droplets formed on coffee leaves and glass surfaces
author Decaro, Sergio T.
author_facet Decaro, Sergio T.
Ferreira, Marcelo Da C.
Lasmar, Olinto
author_role author
author2 Ferreira, Marcelo Da C.
Lasmar, Olinto
author2_role author
author
dc.contributor.none.fl_str_mv FCAV
dc.contributor.author.fl_str_mv Decaro, Sergio T.
Ferreira, Marcelo Da C.
Lasmar, Olinto
dc.subject.por.fl_str_mv surface tension
contact angle
wetted area
oil
tensão superficial
ângulo de contato
área molhada
óleo
topic surface tension
contact angle
wetted area
oil
tensão superficial
ângulo de contato
área molhada
óleo
description The physical characteristics of a spray liquid are important in getting a good droplet formation and control efficiency over a particular target. As a function of these characteristics, it is possible to decipher which is the best adjuvant based on the respective concentration used during the spray. Therefore, ten spraying liquids were prepared, which varied in concentrations of pesticide lufenuron + profenofos, mineral oil, water and manganese sulfate. Pendant droplets formed from these mixtures were measured to examine their impact on surface tension. Droplets were applied to the surface of coffee leaves and the surface tension, contact angle formed and the leaf area wetted by the droplet, were measured. A smooth glass surface was taken as a comparative to the coffee leaves. The highest concentrations of oil resulted in lower surface tension, smaller contact angles of droplets on leaf surfaces and larger areas wetted by the droplets. Both surfaces showed hydrophilic behavior.
publishDate 2015
dc.date.none.fl_str_mv 2015
2021-07-14T10:21:12Z
2021-07-14T10:21:12Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://dx.doi.org/10.1590/1809-4430-Eng.Agric.v35n3p588-600/2015
Engenharia Agrícola. Associação Brasileira de Engenharia Agrícola, v. 35, n. 3, p. 588-600, 2015.
1809-4430
0100-6916
http://hdl.handle.net/11449/211226
10.1590/1809-4430-Eng.Agric.v35n3p588-600/2015
S0100-69162015000300588
S0100-69162015000300588.pdf
url http://dx.doi.org/10.1590/1809-4430-Eng.Agric.v35n3p588-600/2015
http://hdl.handle.net/11449/211226
identifier_str_mv Engenharia Agrícola. Associação Brasileira de Engenharia Agrícola, v. 35, n. 3, p. 588-600, 2015.
1809-4430
0100-6916
10.1590/1809-4430-Eng.Agric.v35n3p588-600/2015
S0100-69162015000300588
S0100-69162015000300588.pdf
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Engenharia Agrícola
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 588-600
application/pdf
dc.publisher.none.fl_str_mv Associação Brasileira de Engenharia Agrícola
publisher.none.fl_str_mv Associação Brasileira de Engenharia Agrícola
dc.source.none.fl_str_mv SciELO
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Repositório Institucional da UNESP
collection Repositório Institucional da UNESP
repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
repository.mail.fl_str_mv
_version_ 1797789313669267456

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