Influence of temperature and leaf wetness duration in the severity of Cercospora leaf spot of beet
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Summa phytopathologica (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-54052016000100089 |
Resumo: | ABSTRACT In the present study, the influence of temperature (15, 20, 25, 30 and 35°C) and leaf wetness period (6, 12, 24 and 48 hours) on the severity of Cercospora leaf spot of beet, caused by Cercospora beticola, was studied under controlled conditions. Lesion density was influenced by temperature and leaf wetness duration (P<0.05). Data were subjected to nonlinear regression analysis. The generalized beta function was used for fitting the disease severity and temperature data, while a logistic function was chosen to represent the effect of leaf wetness on the severity of Cercospora leaf spot. The response surface resultant of the product of the two functions was expressed as ES = 0.0001105 * (((x-8)2.294387) * ((36-x)0.955017)) * (0.39219/(1+25.93072 * exp (-0.16704*y))), where: ES represents the estimated severity value (0.1); x, the temperature (ºC) and y, the leaf wetness duration (hours). This model should be validated under field conditions to assess its use as a computational forecast system for Cercospora leaf spot of beet. |
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Influence of temperature and leaf wetness duration in the severity of Cercospora leaf spot of beetBeta vulgarisCercospora beticolaepidemiologyplant disease forecastingABSTRACT In the present study, the influence of temperature (15, 20, 25, 30 and 35°C) and leaf wetness period (6, 12, 24 and 48 hours) on the severity of Cercospora leaf spot of beet, caused by Cercospora beticola, was studied under controlled conditions. Lesion density was influenced by temperature and leaf wetness duration (P<0.05). Data were subjected to nonlinear regression analysis. The generalized beta function was used for fitting the disease severity and temperature data, while a logistic function was chosen to represent the effect of leaf wetness on the severity of Cercospora leaf spot. The response surface resultant of the product of the two functions was expressed as ES = 0.0001105 * (((x-8)2.294387) * ((36-x)0.955017)) * (0.39219/(1+25.93072 * exp (-0.16704*y))), where: ES represents the estimated severity value (0.1); x, the temperature (ºC) and y, the leaf wetness duration (hours). This model should be validated under field conditions to assess its use as a computational forecast system for Cercospora leaf spot of beet.Grupo Paulista de Fitopatologia2016-03-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-54052016000100089Summa Phytopathologica v.42 n.1 2016reponame:Summa phytopathologica (Online)instname:Grupo Paulista de Fitopatologiainstacron:GPF10.1590/0100-5405/2111info:eu-repo/semantics/openAccessMarcuzzo,Leandro LuizHaveroth,RobertoNacimento,Alineeng2016-03-18T00:00:00Zoai:scielo:S0100-54052016000100089Revistahttp://www.scielo.br/sphttps://old.scielo.br/oai/scielo-oai.phpsumma@fca.unesp.br1980-54540100-5405opendoar:2016-03-18T00:00Summa phytopathologica (Online) - Grupo Paulista de Fitopatologiafalse |
dc.title.none.fl_str_mv |
Influence of temperature and leaf wetness duration in the severity of Cercospora leaf spot of beet |
title |
Influence of temperature and leaf wetness duration in the severity of Cercospora leaf spot of beet |
spellingShingle |
Influence of temperature and leaf wetness duration in the severity of Cercospora leaf spot of beet Marcuzzo,Leandro Luiz Beta vulgaris Cercospora beticola epidemiology plant disease forecasting |
title_short |
Influence of temperature and leaf wetness duration in the severity of Cercospora leaf spot of beet |
title_full |
Influence of temperature and leaf wetness duration in the severity of Cercospora leaf spot of beet |
title_fullStr |
Influence of temperature and leaf wetness duration in the severity of Cercospora leaf spot of beet |
title_full_unstemmed |
Influence of temperature and leaf wetness duration in the severity of Cercospora leaf spot of beet |
title_sort |
Influence of temperature and leaf wetness duration in the severity of Cercospora leaf spot of beet |
author |
Marcuzzo,Leandro Luiz |
author_facet |
Marcuzzo,Leandro Luiz Haveroth,Roberto Nacimento,Aline |
author_role |
author |
author2 |
Haveroth,Roberto Nacimento,Aline |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Marcuzzo,Leandro Luiz Haveroth,Roberto Nacimento,Aline |
dc.subject.por.fl_str_mv |
Beta vulgaris Cercospora beticola epidemiology plant disease forecasting |
topic |
Beta vulgaris Cercospora beticola epidemiology plant disease forecasting |
description |
ABSTRACT In the present study, the influence of temperature (15, 20, 25, 30 and 35°C) and leaf wetness period (6, 12, 24 and 48 hours) on the severity of Cercospora leaf spot of beet, caused by Cercospora beticola, was studied under controlled conditions. Lesion density was influenced by temperature and leaf wetness duration (P<0.05). Data were subjected to nonlinear regression analysis. The generalized beta function was used for fitting the disease severity and temperature data, while a logistic function was chosen to represent the effect of leaf wetness on the severity of Cercospora leaf spot. The response surface resultant of the product of the two functions was expressed as ES = 0.0001105 * (((x-8)2.294387) * ((36-x)0.955017)) * (0.39219/(1+25.93072 * exp (-0.16704*y))), where: ES represents the estimated severity value (0.1); x, the temperature (ºC) and y, the leaf wetness duration (hours). This model should be validated under field conditions to assess its use as a computational forecast system for Cercospora leaf spot of beet. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-03-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-54052016000100089 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-54052016000100089 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/0100-5405/2111 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Grupo Paulista de Fitopatologia |
publisher.none.fl_str_mv |
Grupo Paulista de Fitopatologia |
dc.source.none.fl_str_mv |
Summa Phytopathologica v.42 n.1 2016 reponame:Summa phytopathologica (Online) instname:Grupo Paulista de Fitopatologia instacron:GPF |
instname_str |
Grupo Paulista de Fitopatologia |
instacron_str |
GPF |
institution |
GPF |
reponame_str |
Summa phytopathologica (Online) |
collection |
Summa phytopathologica (Online) |
repository.name.fl_str_mv |
Summa phytopathologica (Online) - Grupo Paulista de Fitopatologia |
repository.mail.fl_str_mv |
summa@fca.unesp.br |
_version_ |
1754193418445127680 |