Effect of lesion age, humidity, and fungicide application on sporulation of Alternaria alternata, the cause of brown spot of tangerine
Autor(a) principal: | |
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Data de Publicação: | 2006 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1094/PD-90-1051 http://hdl.handle.net/11449/35142 |
Resumo: | Alternaria brown spot, caused by Alternaria alternata, causes yield losses and fruit blemishes on many tangerines and their hybrids in most citrus areas of the world where susceptible cultivars are grown. Although the conditions affecting infection and disease severity are known, little information is available on inoculum production on infected tissue. We found that sporulation on leaves began about 10 days after symptoms developed, was abundant from 20 to 40 days, and declined thereafter. Conidial production was far greater on leaf than on fruit or twig lesions. Spore production per unit area of leaf lesion was greater on the more susceptible hybrids, Minneola and Orlando tangelos, than on the less susceptible Murcott tangor. At 74% relative humidity, conidial production on leaf lesions was low, but it was abundant at 85, 92.5, 96, and 100%. Application of Q(o)I or copper fungicides, but not ferbam, suppressed sporulation on leaf lesions for about 14 to 21 days after application. Additional applications did not appear to be more effective than a single spray in reducing inoculum production. |
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spelling |
Effect of lesion age, humidity, and fungicide application on sporulation of Alternaria alternata, the cause of brown spot of tangerineAlternaria brown spot, caused by Alternaria alternata, causes yield losses and fruit blemishes on many tangerines and their hybrids in most citrus areas of the world where susceptible cultivars are grown. Although the conditions affecting infection and disease severity are known, little information is available on inoculum production on infected tissue. We found that sporulation on leaves began about 10 days after symptoms developed, was abundant from 20 to 40 days, and declined thereafter. Conidial production was far greater on leaf than on fruit or twig lesions. Spore production per unit area of leaf lesion was greater on the more susceptible hybrids, Minneola and Orlando tangelos, than on the less susceptible Murcott tangor. At 74% relative humidity, conidial production on leaf lesions was low, but it was abundant at 85, 92.5, 96, and 100%. Application of Q(o)I or copper fungicides, but not ferbam, suppressed sporulation on leaf lesions for about 14 to 21 days after application. Additional applications did not appear to be more effective than a single spray in reducing inoculum production.São Paulo State Univ, Jaboticabal, SP, BrazilUniv Florida, Ctr Agr Res & Educ, Ctr Citrus Res & Educ, Lake Alfred, FL 33850 USAUniv Florida, Ctr Citrus Res & Educ, Dept Plant Pathol, Lake Alfred, FL 33850 USAUniv Ghana, Accra, GhanaSão Paulo State Univ, Jaboticabal, SP, BrazilAmer Phytopathological SocUniversidade Estadual Paulista (Unesp)Univ FloridaUniv GhanaReis, R. F.de Goes, A.Mondal, S. N.Shilts, T.Brentu, F. C.Timmer, L. W.2014-05-20T15:24:33Z2014-05-20T15:24:33Z2006-08-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article1051-1054http://dx.doi.org/10.1094/PD-90-1051Plant Disease. St Paul: Amer Phytopathological Soc, v. 90, n. 8, p. 1051-1054, 2006.0191-2917http://hdl.handle.net/11449/3514210.1094/PD-90-1051WOS:000239218500012Web of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengPlant Disease2.9410,575info:eu-repo/semantics/openAccess2021-10-23T11:27:16Zoai:repositorio.unesp.br:11449/35142Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T21:28:35.250245Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Effect of lesion age, humidity, and fungicide application on sporulation of Alternaria alternata, the cause of brown spot of tangerine |
title |
Effect of lesion age, humidity, and fungicide application on sporulation of Alternaria alternata, the cause of brown spot of tangerine |
spellingShingle |
Effect of lesion age, humidity, and fungicide application on sporulation of Alternaria alternata, the cause of brown spot of tangerine Reis, R. F. |
title_short |
Effect of lesion age, humidity, and fungicide application on sporulation of Alternaria alternata, the cause of brown spot of tangerine |
title_full |
Effect of lesion age, humidity, and fungicide application on sporulation of Alternaria alternata, the cause of brown spot of tangerine |
title_fullStr |
Effect of lesion age, humidity, and fungicide application on sporulation of Alternaria alternata, the cause of brown spot of tangerine |
title_full_unstemmed |
Effect of lesion age, humidity, and fungicide application on sporulation of Alternaria alternata, the cause of brown spot of tangerine |
title_sort |
Effect of lesion age, humidity, and fungicide application on sporulation of Alternaria alternata, the cause of brown spot of tangerine |
author |
Reis, R. F. |
author_facet |
Reis, R. F. de Goes, A. Mondal, S. N. Shilts, T. Brentu, F. C. Timmer, L. W. |
author_role |
author |
author2 |
de Goes, A. Mondal, S. N. Shilts, T. Brentu, F. C. Timmer, L. W. |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Univ Florida Univ Ghana |
dc.contributor.author.fl_str_mv |
Reis, R. F. de Goes, A. Mondal, S. N. Shilts, T. Brentu, F. C. Timmer, L. W. |
description |
Alternaria brown spot, caused by Alternaria alternata, causes yield losses and fruit blemishes on many tangerines and their hybrids in most citrus areas of the world where susceptible cultivars are grown. Although the conditions affecting infection and disease severity are known, little information is available on inoculum production on infected tissue. We found that sporulation on leaves began about 10 days after symptoms developed, was abundant from 20 to 40 days, and declined thereafter. Conidial production was far greater on leaf than on fruit or twig lesions. Spore production per unit area of leaf lesion was greater on the more susceptible hybrids, Minneola and Orlando tangelos, than on the less susceptible Murcott tangor. At 74% relative humidity, conidial production on leaf lesions was low, but it was abundant at 85, 92.5, 96, and 100%. Application of Q(o)I or copper fungicides, but not ferbam, suppressed sporulation on leaf lesions for about 14 to 21 days after application. Additional applications did not appear to be more effective than a single spray in reducing inoculum production. |
publishDate |
2006 |
dc.date.none.fl_str_mv |
2006-08-01 2014-05-20T15:24:33Z 2014-05-20T15:24:33Z |
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/10.1094/PD-90-1051 Plant Disease. St Paul: Amer Phytopathological Soc, v. 90, n. 8, p. 1051-1054, 2006. 0191-2917 http://hdl.handle.net/11449/35142 10.1094/PD-90-1051 WOS:000239218500012 |
url |
http://dx.doi.org/10.1094/PD-90-1051 http://hdl.handle.net/11449/35142 |
identifier_str_mv |
Plant Disease. St Paul: Amer Phytopathological Soc, v. 90, n. 8, p. 1051-1054, 2006. 0191-2917 10.1094/PD-90-1051 WOS:000239218500012 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Plant Disease 2.941 0,575 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
1051-1054 |
dc.publisher.none.fl_str_mv |
Amer Phytopathological Soc |
publisher.none.fl_str_mv |
Amer Phytopathological Soc |
dc.source.none.fl_str_mv |
Web of Science 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_ |
1808129324284379136 |