[PDF] Effects Of Pruning Timing Leaf Removal And Shoot Thinning On Midsouth Winegrape Quality In South Mississippi eBook

Author : Haley Nicole Williams
Publisher :
Page : 0 pages
File Size : 14,61 MB
Release : 2022
Category :
ISBN :

GET BOOK

‘MidSouth’, a relatively low maintenance interspecific hybrid bunch grape currently grown in South Mississippi, has low sugar and high acid levels for red wine use. Two studies, conducted at the Mississippi State University McNeill Research Unit in 2020 and 2021, determined the effects of pruning timing, leaf removal, and shoot thinning on ‘MidSouth’ development and fruit and wine quality. Treatments in the first study included early versus normal pruning timing, both with and without leaf removal, and treatments in the second study included leaf removal, shoot thinning, and control vines. Cluster temperatures, leaf chlorophyll, berries per cluster, berry and cluster weights, crop yield, Ravaz index, total soluble solids, titratable acidity, juice pH, monomeric anthocyanin pigment, and total phenolic content data were collected. It was determined that ‘MidSouth’ fruit quality can be altered through canopy manipulation, but not enough of a desired effect was achieved for these practices to be recommended.

Author : Patricia Chalfant
Publisher :
Page : 89 pages
File Size : 36,98 MB
Release : 2012
Category :
ISBN :

GET BOOK

Abstract: Several winegrapes grown in cool climates, including Vitis vinifera Cabernet Franc and Vitis sp. Chambourcin, benefit from crop reduction. The practice promotes timely fruit maturation and can improve fruit quality. Balanced pruning and cluster thinning are the cultural practices used to attain the desired crop load. However, crop reduction by cluster thinning is labor intensive, costly and typically not mechanized for winegrapes. In this study, the practice of early season leaf removal by hand and with a mechanized leaf remover is proposed as an alternate tool to reduce crop level, thereby optimizing crop load and fruit quality. The objectives were to determine the effects of the timing of leaf removal (pre-bloom, bloom, or fruitset) on yield components, crop load, fruit quality, and cold hardiness in Chambourcin and to 2) determine the effects of manual versus mechanical leaf removal at different phenological stages on yield components, growth, crop load, and fruit quality in Cabernet Franc. In Chambourcin, leaf removal at pre-bloom in 2010 and bloom in 2010 and 2011 reduced yield as compared to defoliation at fruitset and control (no removal). Early season leaf removal reduced crop load (Ravaz index) in both years. Defoliation at bloom increased bud lignification in both years and reduced bud injury in fall of 2010. Defoliation at pre-bloom reduced bud injury in winter in one of two years. In Cabernet Franc, manual leaf removal at pre-bloom and mechanical leaf removal at bloom reduced yield. Leaf removal had no negative effects on pH, titratable acidity, soluble solids, or total phenolics in either cultivar in either year. Early season leaf removal can be used to control yield without negatively impacting growth, cluster compactness, disease incidence, fruit composition, or lignification. It is concluded that early season leaf removal is a viable alternative to cluster thinning as a method of yield reduction in Chambourcin. Early season mechanical leaf removal is a viable alternative to manual leaf removal.

Author : Xinyi Zhang
Publisher :
Page : 104 pages
File Size : 49,49 MB
Release : 2013
Category : Grapes
ISBN :

GET BOOK

Norton (Vitis aestivalis Michx) is a vigorous grape cultivar that grows a dense canopy. This leads to shade in the fruiting zone that negatively affects fruit quality. Canopy management is thought to reduce canopy density and overcome this negative effect. Shoot thinning, shoot positioning, leaf removal, and summer lateral removal were done in various combinations of five treatments. Three of the treatments with opened canopies increased light and ventilation in the fruiting zone. Total fruit weight per vine and average cluster weight were not affected. Neither were juice soluble solids, pH, potassium, and malic acid. Cane pruning weight per vine was not consistently altered by treatment. Titratable acidity of juice was affected, showing a decrease with leaf or leaf and summer lateral removal. These practices would be beneficial in growing Norton because of its potential for high acidity at harvest. Wine pH, titratable acidity, and potassium were not affected; however, all were acceptable in the finished wine. Visual observation showed that the dense canopy control was prone to rot, and the leaf and summer lateral removal treatment was prone to fruit sunburn. Leaf removal is likely a better choice than both leaf and summer lateral removal. Leaf removal is faster to implement and there is less potential for fruit sunburn from excessive defoliation that comes from both leaf and summer lateral removal.

Author : Dawn Marie Ahlgren Chapman
Publisher :
Page : 318 pages
File Size : 28,40 MB
Release : 2004
Category : Cabernet (Wine)
ISBN :

GET BOOK

"... examines the effects of vine pruning, crop thinning, and vine irrigation on Cabernet Sauvignon and Sangiovese wine sensory attributes. Descriptive analysis was used to examine the differences among wines made from multiple pruning, thinning and irrigation treatments. In addition, a new SPME GC-MS method was developed to quantify 2-methoxy-3-isobutylpyrazine, a vegetative aroma compound, in wine."--Abstract.

Author : Various
Publisher : Read Books Ltd
Page : 123 pages
File Size : 33,63 MB
Release : 2016-08-26
Category : Science
ISBN : 1473354498

GET BOOK

This book contains a collection of vintage articles on managing a grapevine, with a special focus on pruning and trimming. These timeless articles have been carefully selected for a modern readership, and will be of considerable utility to farmers and gardeners with a practical interest in growing grapes. The articles include: “Theory and Practice of Pruning and Training”, “Pruning and Management”, “Trimming”, “Vine Pruning”, “Pruning Young Vines and the Sultanas”, “Pruning and Training”, and “Time to Prune, and Pruning and Training”. All of the articles have been written by experts in the field, making this both a useful handbook and a worthy addition to collections of vintage fruit growing literature. Many vintage books such as this are becoming increasingly rare and expensive. It is with this in mind that we are republishing this volume now in an affordable, high-quality edition complete with a specially commissioned new introduction on wine making.