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dc.contributor.authorGonzalez, Luis
dc.contributor.authorTorres Lezcano, Estanis
dc.contributor.authorCarbó, J.
dc.contributor.authorAlegre Castellví, Simó
dc.contributor.authorBonany, Joan
dc.contributor.authorÀvila, Gloria
dc.contributor.authorMartín, Begoña
dc.contributor.authorRecasens Guinjuan, Inmaculada
dc.contributor.authorAsin Jones, Luis
dc.date.accessioned2021-03-18T07:04:22Z
dc.date.available2021-03-18T07:04:22Z
dc.date.issued2019-08-30
dc.identifier.issn1573-5087
dc.identifier.urihttp://hdl.handle.net/10459.1/70785
dc.description.abstractCrop thinning is an important and difficult agricultural practice. Knowing the effect of the application dose of a product is a crucial element of any thinning program. The aims of this study were to investigate the effect of different metamitron doses on Gala and Fuji apples applied at fruit king diameters of between 8 and 10 mm and to determine fluorescence inhibition at the different application rates. Trials were conducted over two seasons from 2015 to 2016 in apple orchards in Lleida (Spain). Photosynthesis inhibition caused by metamitron was also analysed and measured, using chlorophyll fluorescence and biexponential pharmacokinetic models. Under the trial conditions, the application of metamitron reduced final fruit set, number of fruits per tree and crop load depending on the application rate. A dose effect was observed in all yield parameters. Moreover, when metamitron showed high efficacy, there was an improvement in fruit weight, coloration and diameter. The estimated parameters A, α and B using a biexponential equation were related with final fruit set, however the period of inhibition has to be finished before prediction can be made of metamitron efficacy in the year. The fluorescence analysis showed a dose effect, with metamitron dose increasing inhibition. Additionally, the same result was also observed in the area under curve analysis, with metamitron dose reducing the area and inhibition increasing. In all yield parameters, the fluorescence and area under curve analyses showed differences between cultivars, with the inhibition caused by metamitron higher in Gala than in Fuji. Moreover, differences between years were observed. 2015 was warmer than 2016, and the higher temperatures increased the thinning efficacy of metamitron.ca_ES
dc.description.sponsorshipThis study was supported financially by project INIA (RTA2012-00116-00-00) in collaboration with ADAMA-Spain.ca_ES
dc.language.isoengca_ES
dc.publisherSpringer Natureca_ES
dc.relationMICINN/PN2008-2011/RTA2012-00116-00-00ca_ES
dc.relation.isformatofVersió postprint del document publicat a: https://doi.org/10.1007/s10725-019-00531-0ca_ES
dc.relation.ispartofPlant Growth Regulation, 2019, vol. 89, p. 259-271ca_ES
dc.rights(c) Springer Nature, 2019ca_ES
dc.subjectCrop loadca_ES
dc.subjectDosesca_ES
dc.subjectCarbohydrate deficitca_ES
dc.subjectFruit abscissionca_ES
dc.subjectPhotosynthesisca_ES
dc.titleEffect of different application rates of metamitron as fruitlet chemical thinner on thinning efficacy and fluorescence inhibition in Gala and Fuji appleca_ES
dc.typeinfo:eu-repo/semantics/articleca_ES
dc.type.versioninfo:eu-repo/semantics/acceptedVersionca_ES
dc.rights.accessRightsinfo:eu-repo/semantics/openAccessca_ES
dc.identifier.doihttps://doi.org/10.1007/s10725-019-00531-0


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