Physical characteristics of oily spraying liquids and droplets formed on coffee leaves and glass surfaces
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Outros Autores: | , |
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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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 |