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Carry-over effects on bud fertility makes early defoliation a risky crop-regulating practice in Mediterranean vineyards

2020Journal article Open access
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dc.contributor.authorLopes, C.M.
dc.contributor.authorEgipto, R.
dc.contributor.authorZarrouk, O.
dc.contributor.authorChaves, M.M.
dc.date.accessioned2021-09-23T15:24:54Z
dc.date.available2021-09-23T15:24:54Z
dc.date.issued2020
dc.description.abstractBackground and Aims: Recently, early defoliation (ED) has been used widely to regulate yield and reduce bunch compactness to improve tolerance to bunch rot. The aim of this study was to test ED, as an alternative to the conventional crop thinning (CT), to regulate yield and improve tolerance to bunch rot of the Vitis vinifera L. cv. Aragonez. Methods and Results: Early defoliation and CT were compared with an untreated Control over three consecutive seasons in a commercial vineyard in Portugal. Early defoliation had little effect on tolerance to bunch rot and led to progressive loss of yield reducing fruitset, bunch number, berry number and mass, compared to Control vines. Reduced bunch number is likely to be a function of reduced bud fertility. Crop thinning also reduced yield but, unlike ED, the yield reduction was less and remained constant over the seasons studied. Both ED and CT had little effect on berry composition. Conclusions: Among the two crop-regulating techniques, CT appears more suitable than ED to control grape yields in regions where yield limitations are imposed. The progressive yield decline caused by ED is likely to be not economically viable in the region studied. Significance of the Study: Early defoliation reduces bud fertility in unirrigated vineyards under Mediterranean conditions. Therefore, this practice should be avoided under those conditionspt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationAustralian Journal of Grape and Wine Research 26, 290–299, 2020pt_PT
dc.identifier.doidoi: 10.1111/ajgw.12437pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.5/21973
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherAustralian Society of Viticulture and Oenology Inc.pt_PT
dc.relationBioresources 4 Sustainability
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectbunch rotpt_PT
dc.subjectcrop thinningpt_PT
dc.subjectfruitsetpt_PT
dc.subjectVitis vinifera L.pt_PT
dc.subjectyield componentspt_PT
dc.titleCarry-over effects on bud fertility makes early defoliation a risky crop-regulating practice in Mediterranean vineyardspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleBioresources 4 Sustainability
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/OE/51786/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UID%2FMulti%2F04551%2F2013/PT
oaire.citation.titleAustralian Journal of Grape and Wine Researchpt_PT
oaire.fundingStreamOE
oaire.fundingStream6817 - DCRRNI ID
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsembargoedAccesspt_PT
rcaap.typearticlept_PT
relation.isProjectOfPublicationb7b87935-fd69-42fd-bef1-2f9e0b5a0b5b
relation.isProjectOfPublication84957701-6460-4062-b7b6-c84a05a5e7f0
relation.isProjectOfPublication.latestForDiscoveryb7b87935-fd69-42fd-bef1-2f9e0b5a0b5b

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