Download or read book Evaluating the Effects of Vineyard Management Strategies on Cold Stress in Wine Grapes written by Maria Suk Smith and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Cold stress is among the major limiting factors for wine grape production in Pennsylvania. Post-budburst spring frost events and dormant mid-winter low temperatures can cause freeze injury of grapevine vegetative and reproductive tissues resulting in partial or total crop loss. Vineyard management practices, such as site and cultivar selection and crop load management, can impact vine susceptibility to freeze stress through avoidance or tolerance mechanisms. To understand how different practices influence vine susceptibility to freeze injury, it is crucial to analyze plant physiological adaptation and response mechanisms.Three studies utilizing young potted vines grown outdoor and mature vineyard plantings were conducted to evaluate the role of cultivar selection and crop load management in reducing the risk of freeze injury during the dormant season or post-budburst. Each study evaluated different aspects of vineyard practices and the relationship to freeze injury. In the first study, two Vitis species with different genetic parentage and mid-winter freeze tolerance were compared for hydraulic response and recovery to post-budburst freeze injury. Stem xylem anatomical traits of each species were measured to determine their role in vine response and recovery to freeze injury. The second and third studies compared a novel crop load management technique, early leaf removal (ELR), to a more traditional yield regulation practice, cluster thinning (CT), on two high-yielding cultivars, Vitis hybrid Chancellor and V. vinifera Grner Veltliner. In each of these two studies, the timing (Grner Veltliner; trace bloom versus fruit set) and intensity (Chancellor; low versus high) of ELR and CT were compared to an un-defoliated, un-thinned control. One of the objectives was to understand how manipulating vine crop load (i.e., carbohydrate source-sink ratio) would influence leaf photosynthetic capacity (Grner Veltliner) and overwinter starch concentration in storage tissues (Chancellor) and how those factors relate to bud winter freeze tolerance. Additionally, the impact of crop load management practices on commercially important production parameters, such yield components, fruit ripeness, wine composition and consumer sensory perception (Chancellor), and economic impacts were assessed. In the first study, short-term hydraulic response (within 48 hours) to a temperature-controlled post-budburst freeze stress differed by species. Species differences in stem xylem anatomical traits (e.g., vessel frequency, vessel grouping) supported the contrasting hydraulic response. The long-term seasonal recovery from freeze injury, however, was similar between species despite differences in anatomical traits. In the second and third study, ELR had a greater impact on bud freeze tolerance than CT only during vine acclimation in Grner Veltliner and during mid-winter in Chancellor; however, all crop load treatments positively influence starch concentration in perennial tissues. Furthermore, the vine response to ELR depended on the percentage of leaf area removed, which was higher in Chancellor than Grner Veltliner at the same phenological stage. Overall, our results pertaining to freeze injury suggest a continued need for exploring mechanisms behind vine response to vineyard management practices and vine traits that benefit response and recovery to cold stress.

Download or read book REVOLUTIONARY ENOLOGY written by DAVID SANDUA and published by David Sandua. This book was released on 2023-12-07 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Revolutionary Enology" immerses the reader in the exciting world of modern winemaking, revealing how technology and innovation are transforming this ancient tradition. From advanced fermentation techniques to sustainable winemaking practices, the book explores the advances that are improving the quality, taste and sustainability of wines. With a focus on new grape varieties, pest control, and advanced vineyard management, this work is a testament to the dynamism and creativity in contemporary enology, offering a fresh and insightful look at the art and science of winemaking.

Download or read book Wine Grape Production Guide for Eastern North America written by and published by Natural Resource Agriculture and Engineering Service (Nraes). This book was released on 2008-01-01 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evaluating Return on investment from Vine to Wine written by Mitchell Macfarlane and published by . This book was released on 2022 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Cluster thinning, leaf removal and kaolin application are three commonly employed means of modifying fruit zone microclimates assumed to improve grape and wine quality. High labour costs in addition to the potential for location and varietal-specific responses make the benefits of these practices equivocal. To explore this question, I employed a stratified random block design in two Vancouver Island commercial vineyards where Pinot gris vines were manipulated with one of four experimental treatments: control, cluster thinning to one cluster per shoot, heavy leaf removal with a Kaolin clay application, or a combined heavy leaf removal - cluster thinning - Kaolin treatment. The resulting wines were subjected to detailed sensory evaluations, consumer valuation, and a cost-benefit analysis to determine their respective return-on-investment. Results indicate that despite apparent sensory changes driven by vineyard treatments, the lack of any perceived added value suggests that regional producers of Pinot gris should avoid using the assessed treatments as strategies to increase wine quality. The cost-benefit analysis revealed that heavy leaf removal combined with Kaolin clay application may provide a benefit outside of changes to wine quality. The demonstrable improvement in growing conditions under this treatment resulted in a significant decrease in rot pressure. This suggests that the treatment may be a viable option for increasing usable yields of Pinot gris without placing an insurmountable financial cost on the producer.

Download or read book Proceedings written by 1985 OHIO GRAPE-WINE SHORT COURSE (Columbus, Ohio) and published by . This book was released on 1985 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cleaning and sanitizing of winery equipment. Breeding grapes for cold hardiness and quality. An overview of enological research in California. Grape Phylloxera: an overview of new concern worldwine. Steps to producing high quality Labrusca wines. Principles of sulfur dioxide addition. Vineyard mechanization - it's effect on yield and quality. An update on federal rules and regulations pertaining to wines. Evaluation of an electronic black rot disease predictor in commercial grape vineyards. White wine quality as influenced by must clarification. Source-sink relationships in the grapevine. Results of preserving freshly pressed juice. New approaches to white table wine production. Overview of viticulture and grape utilization research at the University of Arkansas. An overview of winery sanitation. The development of an integrated pest management program for ohio vineyards. Grape cultivar research.

Download or read book Viticulture and Winemaking under Climate Change written by Helder Fraga and published by MDPI. This book was released on 2019-12-19 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt: The importance of viticulture and the winemaking socio-economic sector is acknowledged worldwide. The most renowned winemaking regions show very specific environmental characteristics, where climate usually plays a central role. Considering the strong influence of weather and climatic factors on grapevine yields and berry quality attributes, climate change may indeed significantly impact this crop. Recent trends already point to a pronounced increase in growing season mean temperatures, as well as changes in precipitation regimes, which have been influencing wine typicity across some of the most renowned winemaking regions worldwide. Moreover, several climate scenarios give evidence of enhanced stress conditions for grapevine growth until the end of the century. Although grapevines have high resilience, the clear evidence for significant climate change in the upcoming decades urges adaptation and mitigation measures to be taken by sector stakeholders. To provide hints on the abovementioned issues, we have edited a Special Issue entitled “Viticulture and Winemaking under Climate Change”. Contributions from different fields were considered, including crop and climate modeling, and potential adaptation measures against these threats. The current Special Issue allows for the expansion of scientific knowledge in these particular fields of research, as well as providing a path for future research.

Download or read book Managing Wine Quality written by Andrew G. Reynolds and published by Woodhead Publishing. This book was released on 2010-10-14 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many aspects of both grape production and winemaking influence wine sensory properties and stability. Progress in research helps to elucidate the scientific basis of quality variation in wine and suggest changes in viticulture and oenology practices. The two volumes of Managing wine quality review developments of importance to wine producers, researchers, and students. The focus is on recent studies, advanced methods and likely future technologies. Volume 1 opens with chapters reviewing current understanding of wine aroma, colour, taste and mouthfeel. Part two focuses on the measurement of grape and wine properties. Topics covered include instrumental analysis of grape, must and wine, sensory evaluation and wine authenticity and traceability. The effects of viticulture technologies on grape composition and wine quality attributes are the subject of part three. Terroir, viticultural and vineyard management practices, fungal contaminants and grape processing equipment are among the areas discussed. Volume 2 opens with chapters reviewing the impact of different winemaking technologies on quality. Topics covered include yeast and fermentation management, enzymes, ageing on lees, new directions in stabilisation, clarification and fining of white wines and alternatives to cork in wine bottle closures. Managing wine sensory quality is the major focus of part two. Authors consider issues such as cork taint, non-enzymatic oxidation and the impact of ageing on wine flavour deterioration. The volume concludes with chapters on the management of the quality of ice wines and sparkling wines. Reviews current understanding of wine aroma, colour, taste and mouthfeel Details the measurement of grape and wine properties through instrumental analysis, must and wine, and sensory evaluation Reviews the impact of different technologies on wine quality

Download or read book Impact of Different Irrigation Strategies on Grapes and Wine Quality of Four Grapevine Cultivars Vitis Sp in Cool Climate Conditions An Investigation Into the Relationships Among ABA Water Status Grape Cultivar and Wine Quality written by Gabriel Balint and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Grapevine in a Changing Environment written by Hernâni Gerós and published by John Wiley & Sons. This book was released on 2015-10-09 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: Grapes (Vitis spp.) are economically the most important fruit species in the world. Over the last decades many scientific advances have led to understand more deeply key physiological, biochemical, and molecular aspects of grape berry maturation. However, our knowledge on how grapevines respond to environmental stimuli and deal with biotic and abiotic stresses is still fragmented. Thus, this area of research is wide open for new scientific and technological advancements. Particularly, in the context of climate change, viticulture will have to adapt to higher temperatures, light intensity and atmospheric CO2 concentration, while water availability is expected to decrease in many viticultural regions, which poses new challenges to scientists and producers. With Grapevine in a Changing Environment, readers will benefit from a comprehensive and updated coverage on the intricate grapevine defense mechanisms against biotic and abiotic stress and on the new generation techniques that may be ultimately used to implement appropriate strategies aimed at the production and selection of more adapted genotypes. The book also provides valuable references in this research area and original data from several laboratories worldwide. Written by 63 international experts on grapevine ecophysiology, biochemistry and molecular biology, the book is a reference for a wide audience with different backgrounds, from plant physiologists, biochemists and graduate and post-graduate students, to viticulturists and enologists.

Download or read book Growing Quality Grapes to Winery Specification written by Mark Krstic and published by . This book was released on 2003 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Assessing and Managing Cold Damage in Washington Vineyards written by Michelle Moyer and published by . This book was released on 2019 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the winter, grapevine varieties require some degree and duration of low temperature exposure in order to fulfill plant chilling requirements. Adequate chilling is critical to uniform and timely budbreak the following spring. However, in northern production areas, vines can be exposed to very low temperatures, or sudden drops in temperature that are outside of their range of adaptation. When temperatures fall below the level of vine cold hardiness, there can be damage to buds, canes, cordons, trunks, or roots, and even death of the vine. Vineyard assessment of cold damage can be a laborious process and an unnecessary one if cold damage has not occurred. Prior to making assessments, check local weather data and compare to WSU's grape cold hardiness data to see if critical temperature thresholds for damage have occurred. If these thresholds have been met, then proceed with damage assessment.

Download or read book Evaluation of the Effects of Two Deficit Irrigation Strategies on Vitis Vinifera Cabernet Sauvignon Yield Fruit Composition Cold Acclimation and Hardiness written by Ashley R. Basinger and published by . This book was released on 2004 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Viticulture and Environment written by J. S. Gladstones and published by . This book was released on 1992 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effects of Vineyard Floor Management Systems on Vine Growth and Fruit Composition of Red Wine Grapes written by Gregory Louis Hostetler and published by . This book was released on 2006 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Cultural Manipulation of Vine Vigor as it Relates to the Cold Hardiness Wine Quality and Productivity of Baco Noir Grapevines Initial Effects written by Michael Edward Byrne and published by . This book was released on 1976 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evaluating Cold Hardy Wine Grape Maturity written by Amaya Atucha and published by . This book was released on 2018 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Cover Cropping in Vineyards written by Chuck A. Ingels and published by University of California, Agriculture and Natural Resources. This book was released on 1998 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: This guide features cutting-edge methods for using cover crops to enhance vineyard performance. Based on extensive research, this guide details technical and theoretical information on how cover crops affect vineyards and promote ecological stability. With how-to instructions for activities such as field application, this practical reference is a must-have for vineyard owners, managers, consultants, and pest control advisers.