Effect of pre-bloom leaf defoliation on cluster morphology and disease pressure

Bibliographic Details
Main Author: Poulsen, Kristian Wermuth
Publication Date: 2015
Format: Master thesis
Language: eng
Source: Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
Download full: http://hdl.handle.net/10400.5/12214
Summary: Mestrado Vinifera Euromaster - Instituto Superior de Agronomia - UL
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network_name_str Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
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spelling Effect of pre-bloom leaf defoliation on cluster morphology and disease pressuredefoliationfruit-setcluster morphologyRieslingcool climateMestrado Vinifera Euromaster - Instituto Superior de Agronomia - ULDefoliation of grapevines have been shown to impact fruit set and fruit development, although the extent to and timing of which defoliation impacts fruit set and development is still being investigated. This is useful for the purpose of managing crop load and can be a useful tool for disease management. Currently, the understanding is that removal of leaves from the fruiting zone alters the source-sink balance, forcing the grapevine to down-prioritize flowering resulting in reduced fruit set, smaller clusters and less rot (Incidence x Severity). The purpose of this project is to investigate how pre-bloom removal of the six basal leaves on Riesling (clone 49) grapevines alters fruit set, cluster morphology and berry composition. The experiment was conducted in 2014 at Michigan State University’s Southwest Michigan research and Extension Center in Benton Harbor, MI (lat. 42005’10.55” N, long. 86021’03.68”W). Our experiments show that there is a significant impact on fruit set as a consequence of defoliation, where defoliated vines showed a lower percentage of fruit set compared to control (43% vs. 63.4%) and the lower fruit set percentage also yielded less rot within the clusters (21.3% vs. 31.5%). Differences were noted in the rachis development (rachis were heavier and thicker with longer lateral branches in the control), but no significant changes were observed in berry composition and the proportions of successfully to unsuccessfully seeded berries as a result of the treatmentISA-ULLopes, Carlos Manuel AntunesSabbatini, PaoloRepositório da Universidade de LisboaPoulsen, Kristian Wermuth2016-09-26T14:29:48Z20152015-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttp://hdl.handle.net/10400.5/12214engPoulsen, K.W. - Effect of pre-bloom leaf defoliation on cluster morphology and disease pressure. Lisboa: ISA, 2015, 49 p.info:eu-repo/semantics/openAccessreponame:Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)instname:FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologiainstacron:RCAAP2025-03-17T16:06:03Zoai:repositorio.ulisboa.pt:10400.5/12214Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireinfo@rcaap.ptopendoar:https://opendoar.ac.uk/repository/71602025-05-29T04:02:42.495243Repositórios Científicos de Acesso Aberto de Portugal (RCAAP) - FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologiafalse
dc.title.none.fl_str_mv Effect of pre-bloom leaf defoliation on cluster morphology and disease pressure
title Effect of pre-bloom leaf defoliation on cluster morphology and disease pressure
spellingShingle Effect of pre-bloom leaf defoliation on cluster morphology and disease pressure
Poulsen, Kristian Wermuth
defoliation
fruit-set
cluster morphology
Riesling
cool climate
title_short Effect of pre-bloom leaf defoliation on cluster morphology and disease pressure
title_full Effect of pre-bloom leaf defoliation on cluster morphology and disease pressure
title_fullStr Effect of pre-bloom leaf defoliation on cluster morphology and disease pressure
title_full_unstemmed Effect of pre-bloom leaf defoliation on cluster morphology and disease pressure
title_sort Effect of pre-bloom leaf defoliation on cluster morphology and disease pressure
author Poulsen, Kristian Wermuth
author_facet Poulsen, Kristian Wermuth
author_role author
dc.contributor.none.fl_str_mv Lopes, Carlos Manuel Antunes
Sabbatini, Paolo
Repositório da Universidade de Lisboa
dc.contributor.author.fl_str_mv Poulsen, Kristian Wermuth
dc.subject.por.fl_str_mv defoliation
fruit-set
cluster morphology
Riesling
cool climate
topic defoliation
fruit-set
cluster morphology
Riesling
cool climate
description Mestrado Vinifera Euromaster - Instituto Superior de Agronomia - UL
publishDate 2015
dc.date.none.fl_str_mv 2015
2015-01-01T00:00:00Z
2016-09-26T14:29:48Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/masterThesis
format masterThesis
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10400.5/12214
url http://hdl.handle.net/10400.5/12214
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Poulsen, K.W. - Effect of pre-bloom leaf defoliation on cluster morphology and disease pressure. Lisboa: ISA, 2015, 49 p.
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv ISA-UL
publisher.none.fl_str_mv ISA-UL
dc.source.none.fl_str_mv reponame:Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
instname:FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologia
instacron:RCAAP
instname_str FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologia
instacron_str RCAAP
institution RCAAP
reponame_str Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
collection Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
repository.name.fl_str_mv Repositórios Científicos de Acesso Aberto de Portugal (RCAAP) - FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologia
repository.mail.fl_str_mv info@rcaap.pt
_version_ 1833601923207397376

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