A systematic review and meta-analysis of vineyard techniques used to delay ripening.

DOI: 10.31220/agriRxiv.2021.00112
Statement: This article is a preprint and has not been peer-reviewed. It reports new research that has yet to be evaluated and so should not be used to guide clinical practice.
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    Abstract: Abstract Several vineyard techniques have been proposed to delay grape maturity in light of the advanced maturation driven by increasingly frequent water and heat stress events that are detrimental to grape quality. These studies differ in terms of their experimental conditions, and in the present work we have attempted to summarize previous observations in a quantitative, data-driven systematic review. A meta-analysis of quantitative data gathered across 43 relevant studies revealed the overall significance of the proposed treatments and evaluated the impact of different experimental conditions on the outcome of antitranspirants, delayed pruning and late source limitation. Antitranspirants were most effective when applied twice and closer to veraison, while di-1- p -menthene increased the ripening delay by about 1°Brix compared to kaolin. Larger ripening delays were achieved with delayed pruning of low-yielding vines or by pruning at later stages of apical bud development. Late defoliation or shoot trimming delayed ripening in high-yielding vines and represent suitable solutions for late-harvested varieties, but became ineffective where the treatment decreased yield. This quantitative meta-analysis of 242 primary observations uncovers factors affecting the efficacy of vineyard practices to delay ripening, which should be carefully considered by grape growers attempting to achieve this outcome.

    Key words: pruning; late; delay; vineyard; quantitative; delaye

    Submit time: 1 January 2021

    Copyright: The copyright holder for this preprint is the author/funder, who has granted agriXiv a license to display the preprint in perpetuity.
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    1 2021-01-01

    10.31220/agriRxiv.2021.00112V1

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Pietro Previtali, Filippo Giorgini, Randall Mullen, Nick K. Dookozlian, Kerry L. Wilkinson, Christopher M. For. A systematic review and meta-analysis of vineyard techniques used to delay ripening.. 2021. agriXiv.2021.00112

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