Temporal progress and spatial patterns of quiescent diseases in guava influenced by sanitation practices

Detalhes bibliográficos
Autor(a) principal: Fischer,Ivan Herman
Data de Publicação: 2017
Outros Autores: Soares-Colletti,Ana Raquel, Palharini,Maria Cecília de Arruda, Parisi,Marise Cagnin Martins, Amorim,Lilian
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Scientia Agrícola (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162017000100068
Resumo: ABSTRACT: Postharvest diseases are a major problem in guava crops as the symptoms normally appear during fruit ripening. This study aimed to detect and characterize the temporal dynamics and spatial patterns of the most important guava diseases in orchards with and without removal of crop residues as a sanitation practice. The experiment was conducted in an orchard of ‘Pedro Sato’ guavas, over two consecutive seasons, and data were collected from the flowering to the fruit ripening stage. In immature guavas treated with paraquat and ethrel, Colletotrichum spp. was detected from the 5th day of incubation. Anthracnose was detected in flowers at incidences higher than 50 % and black spot in fruit larger than 5.5 cm in length. The monomolecular and the exponential models provided the best fit to anthracnose and black spot incidence progress curve data, respectively. Both diseases showed a predominantly random spatial pattern in the orchard. The removal of crop residues reduced the rate of disease progress in at least one season, and was effective in reducing the areas under the quiescent disease progress curves (AUDPC) of anthracnose. Anthracnose incidence increased from 57 to 96 % and black spot from 1 to 48 %, respectively, at fruit maturation levels 1 and 3. A negative correlation was found between disease incidence and the color of the fruit skin (°h). Fruit harvested during the later maturation stages showed higher incidence of the diseases. Due to the wide distribution and early infection of quiescent diseases, starting at flowering, preventive management should consider disease monitoring and removal of crop residues.
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spelling Temporal progress and spatial patterns of quiescent diseases in guava influenced by sanitation practicesColletotrichumGuignardiaPsidium guajavapostharvest fruit rotABSTRACT: Postharvest diseases are a major problem in guava crops as the symptoms normally appear during fruit ripening. This study aimed to detect and characterize the temporal dynamics and spatial patterns of the most important guava diseases in orchards with and without removal of crop residues as a sanitation practice. The experiment was conducted in an orchard of ‘Pedro Sato’ guavas, over two consecutive seasons, and data were collected from the flowering to the fruit ripening stage. In immature guavas treated with paraquat and ethrel, Colletotrichum spp. was detected from the 5th day of incubation. Anthracnose was detected in flowers at incidences higher than 50 % and black spot in fruit larger than 5.5 cm in length. The monomolecular and the exponential models provided the best fit to anthracnose and black spot incidence progress curve data, respectively. Both diseases showed a predominantly random spatial pattern in the orchard. The removal of crop residues reduced the rate of disease progress in at least one season, and was effective in reducing the areas under the quiescent disease progress curves (AUDPC) of anthracnose. Anthracnose incidence increased from 57 to 96 % and black spot from 1 to 48 %, respectively, at fruit maturation levels 1 and 3. A negative correlation was found between disease incidence and the color of the fruit skin (°h). Fruit harvested during the later maturation stages showed higher incidence of the diseases. Due to the wide distribution and early infection of quiescent diseases, starting at flowering, preventive management should consider disease monitoring and removal of crop residues.Escola Superior de Agricultura "Luiz de Queiroz"2017-02-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162017000100068Scientia Agricola v.74 n.1 2017reponame:Scientia Agrícola (Online)instname:Universidade de São Paulo (USP)instacron:USP10.1590/1678-992x-2015-0425info:eu-repo/semantics/openAccessFischer,Ivan HermanSoares-Colletti,Ana RaquelPalharini,Maria Cecília de ArrudaParisi,Marise Cagnin MartinsAmorim,Lilianeng2016-11-29T00:00:00Zoai:scielo:S0103-90162017000100068Revistahttp://revistas.usp.br/sa/indexPUBhttps://old.scielo.br/oai/scielo-oai.phpscientia@usp.br||alleoni@usp.br1678-992X0103-9016opendoar:2016-11-29T00:00Scientia Agrícola (Online) - Universidade de São Paulo (USP)false
dc.title.none.fl_str_mv Temporal progress and spatial patterns of quiescent diseases in guava influenced by sanitation practices
title Temporal progress and spatial patterns of quiescent diseases in guava influenced by sanitation practices
spellingShingle Temporal progress and spatial patterns of quiescent diseases in guava influenced by sanitation practices
Fischer,Ivan Herman
Colletotrichum
Guignardia
Psidium guajava
postharvest fruit rot
title_short Temporal progress and spatial patterns of quiescent diseases in guava influenced by sanitation practices
title_full Temporal progress and spatial patterns of quiescent diseases in guava influenced by sanitation practices
title_fullStr Temporal progress and spatial patterns of quiescent diseases in guava influenced by sanitation practices
title_full_unstemmed Temporal progress and spatial patterns of quiescent diseases in guava influenced by sanitation practices
title_sort Temporal progress and spatial patterns of quiescent diseases in guava influenced by sanitation practices
author Fischer,Ivan Herman
author_facet Fischer,Ivan Herman
Soares-Colletti,Ana Raquel
Palharini,Maria Cecília de Arruda
Parisi,Marise Cagnin Martins
Amorim,Lilian
author_role author
author2 Soares-Colletti,Ana Raquel
Palharini,Maria Cecília de Arruda
Parisi,Marise Cagnin Martins
Amorim,Lilian
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Fischer,Ivan Herman
Soares-Colletti,Ana Raquel
Palharini,Maria Cecília de Arruda
Parisi,Marise Cagnin Martins
Amorim,Lilian
dc.subject.por.fl_str_mv Colletotrichum
Guignardia
Psidium guajava
postharvest fruit rot
topic Colletotrichum
Guignardia
Psidium guajava
postharvest fruit rot
description ABSTRACT: Postharvest diseases are a major problem in guava crops as the symptoms normally appear during fruit ripening. This study aimed to detect and characterize the temporal dynamics and spatial patterns of the most important guava diseases in orchards with and without removal of crop residues as a sanitation practice. The experiment was conducted in an orchard of ‘Pedro Sato’ guavas, over two consecutive seasons, and data were collected from the flowering to the fruit ripening stage. In immature guavas treated with paraquat and ethrel, Colletotrichum spp. was detected from the 5th day of incubation. Anthracnose was detected in flowers at incidences higher than 50 % and black spot in fruit larger than 5.5 cm in length. The monomolecular and the exponential models provided the best fit to anthracnose and black spot incidence progress curve data, respectively. Both diseases showed a predominantly random spatial pattern in the orchard. The removal of crop residues reduced the rate of disease progress in at least one season, and was effective in reducing the areas under the quiescent disease progress curves (AUDPC) of anthracnose. Anthracnose incidence increased from 57 to 96 % and black spot from 1 to 48 %, respectively, at fruit maturation levels 1 and 3. A negative correlation was found between disease incidence and the color of the fruit skin (°h). Fruit harvested during the later maturation stages showed higher incidence of the diseases. Due to the wide distribution and early infection of quiescent diseases, starting at flowering, preventive management should consider disease monitoring and removal of crop residues.
publishDate 2017
dc.date.none.fl_str_mv 2017-02-01
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=S0103-90162017000100068
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162017000100068
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/1678-992x-2015-0425
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 Escola Superior de Agricultura "Luiz de Queiroz"
publisher.none.fl_str_mv Escola Superior de Agricultura "Luiz de Queiroz"
dc.source.none.fl_str_mv Scientia Agricola v.74 n.1 2017
reponame:Scientia Agrícola (Online)
instname:Universidade de São Paulo (USP)
instacron:USP
instname_str Universidade de São Paulo (USP)
instacron_str USP
institution USP
reponame_str Scientia Agrícola (Online)
collection Scientia Agrícola (Online)
repository.name.fl_str_mv Scientia Agrícola (Online) - Universidade de São Paulo (USP)
repository.mail.fl_str_mv scientia@usp.br||alleoni@usp.br
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