Effects on grape and wine quality of bunch thinning of Merlot under Queensland conditions. Final report

Project report

Kennedy, Ursula, Learmonth, Robert and Hassall, Tony. 2009. Effects on grape and wine quality of bunch thinning of Merlot under Queensland conditions. Final report. Adelaide, Australia. Grape and Wine Research and Development Corporation.
Title

Effects on grape and wine quality of bunch thinning of Merlot under Queensland conditions. Final report

Report TypeProject report
AuthorsKennedy, Ursula (Author), Learmonth, Robert (Author) and Hassall, Tony (Author)
Institution of OriginUniversity of Southern Queensland
Number of Pages19
Year2009
PublisherGrape and Wine Research and Development Corporation
Place of PublicationAdelaide, Australia
Web Address (URL)http://www.gwrdc.com.au/webdata/resources/project/RT_06-05-2.pdf
Abstract

Merlot is a major wine grape variety in Queensland, and is commonly crop-thinned locally due to potentially high cropping. Timing of crop thinning has been shown to influence quality. We investigated pea size and veraison crop thinning effects on Merlot yield and quality in the Granite Belt and South Burnett in 2008. Under seasonal conditions experienced, crop thinning did not bring about increased fruit quality. In fact, thinning at pea size may decrease quality. Thinning caused super-optimal leaf area/yield ratios, suggesting under-cropping. As crop thinning may not enhance quality, we recommend thinning only if crop loads are exceptionally high.

Keywordsgrapevine; Merlot; crop-thinning; grape wine quality; vine-balance
ANZSRC Field of Research 2020300207. Agricultural systems analysis and modelling
300805. Oenology and viticulture
310804. Plant developmental and reproductive biology
Public Notes

This publication is copyright. It may be reproduced in whole or in part for the purposes of study, research, or review, but is subject to the inclusion of an acknowledgment of the source.
Project Number: RT 06/05-2.

Byline AffiliationsCentre for Systems Biology
Department of Primary Industries and Fisheries, Queensland
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