Navigation Links
Protecting wine grapes from heat and drought
Date:2/17/2009

PARMA, IDDeficit irrigation is an agricultural technique used to achieve a variety of results depending on the crop. For white wine grapes, it balances the crop load by limiting the canopy size so there aren't too many leaves shading the grapes. For red wine grapes, deficit irrigation again limits canopy size, but also affects berry components associated with wine quality.

A drawback of this canopy-limiting process is that fruit can become sunburned, especially under sunny, arid conditions, which can adversely affect productivity and fruit maturity. A particle film, which increases light reflection and reduces leaf temperature, has been tested on several crops. It acts as a sunscreen by reflecting the harmful ultraviolet rays off of the leaves and fruit, but still allows the right radiation for photosynthesis through to nourish the plant.

Krista Shellie of the U.S. Department of Agriculture led a study to learn more about foliar particle film's effects on wine grapes when the grapes were grown under varying levels of water stress. The study, published in the American Society for Horticultural Science journal HortScience, also noted particle film's effect on grape yield and maturity. Grapes were grown according to commercial practice with the exception of the watering schedule and application of the particle film. Film effectiveness was monitored by measuring the amount of leaf gas exchange, but particle film's influence on this process seemed to differ depending on the amount of water stress the vine was experiencing.

Particle film did not prevent sunburn on exposed fruit when vines were under the most stressful growing conditions, but did increase the weight of a red-skinned wine grape by 7% and increased a white-skinned wine grapes' soluble solids concentration by 11%. But, the weight of white-skinned wine grape and the soluble solids concentration of the red-skinned grape were unaffected. Other factors pertaining to yield, including grape maturity, were not influenced by particle film.

The study's findings support a classification of these grapes as anisohydric, meaning the plant is affected by the amount of soil moisture available and is unable to restrict its own water loss under dry soil conditions. This is also known as a "drought-avoiding" classification.

Particle film may increase the yield potential of the vines, but it did not protect against sun damage when vines were grown under deficit irrigation. The cost-benefit of particle film must be decided by growers and wine makers and its potential benefit of more uniform fruit maturity, increased yield, and berry size.


'/>"/>

Contact: Michael W. Neff
mwneff@ashs.org
703-836-4606
American Society for Horticultural Science
Source:Eurekalert  

Related medicine news :

1. New Report Finds Missouri is Falling Behind in Protecting Kids From Tobacco
2. National Front Line Caregiver Group Urges Senate Leaders to Support Grassley Amendment Protecting Seniors Care, Assuring Stability of Nations Long Term Care Workforce
3. Catholic Charities USA Praises Congress for Protecting Health Care for Low-income Children
4. THCA: Protecting Seniors, Respecting Taxpayers the Right Agenda for Texas
5. U.S. Patent and Trademark Office Issues Mylans Specialty Division, Dey L.P., Three Additional Patents Protecting Perforomist(R) Inhalation Solution
6. New approaches to protecting transplanted organs make first steps toward patients
7. Innovatech Labs, Assisting Companies in Adhering to Halogen-Free Manufacturing Standards Aimed at Protecting the Environment
8. Lumension Security to Host Industry Webinar on Protecting Vital Business Data
9. Protecting patient privacy the new fashioned way
10. Survey Shows Parents' Best Intentions Out of Step With Expert Recommendations in Protecting Kids From Flu
11. VirtualHealth Technologies, Inc., Announces That Its Associate, Private Access, Will Be Partnering with Genetic Alliance To Accelerate Medical Research While Protecting Privacy
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Protecting wine grapes from heat and drought
(Date:5/24/2016)... ... May 24, 2016 , ... Mental health watchdog ... Church of Scientology and renowned professor of psychiatry Thomas Szasz, is continuing its protest ... An Industry of Death” exhibit in Atlanta, Georgia. The opening of the exhibit follows ...
(Date:5/24/2016)... , ... May 24, 2016 , ... Boyd Industries, a ... Delivery Unit® (CDU), a groundbreaking new product for pediatric dentistry , at AAPD ... in San Antonio, TX May 26-29. The Concealed Delivery Unit keeps dental hand pieces ...
(Date:5/24/2016)... ... May 24, 2016 , ... ... and clinical practice of radiosurgery, is recognizing five medical residents and students for ... stereotactic body radiotherapy (SBRT). The awards will be presented at the 2016 SRS/SBRT ...
(Date:5/24/2016)... ... May 24, 2016 , ... As reported by MassGeneral.org, on May ... transplant in the United States . The 64-year-old patient who received the transplant had ... could restore not only a natural appearance, but also urinary and sexual function for ...
(Date:5/24/2016)... ... May 24, 2016 , ... Harvard Health Publications, the consumer ... will deliver a new series of Q&A videos to clinicians and patients at ... expertise of Harvard Medical School faculty into brief videos that clinicians using vidscrip ...
Breaking Medicine News(10 mins):
(Date:5/23/2016)... May 23, 2016 Gamida Cell, ... treatment of cancer and orphan genetic diseases, announced today ... $4.4 million from the Israel Innovation Authority (formerly the ... of Economy and Industry. The mission of the Israel ... various industries, including science and technology, while stimulating economic ...
(Date:5/20/2016)... 20, 2016 The Biotech arena ... that the industry is not far from recovering. There ... featured the following four equities: Anacor Pharmaceuticals Inc. (NASDAQ: ... ATHX ), Aralez Pharmaceuticals Inc. (NASDAQ: ARLZ ... ). Sign up for your free trading alerts on ...
(Date:5/19/2016)... PARIS , May 19,2016 ... Activities at Digestive Disease Week Meeting and 91 ... Society Mauna Kea Technologies (Euronext: MKEA, ... laser endomicroscopy platform, today announced that its Cellvizio ... meeting focused on gastroenterology during the month of ...
Breaking Medicine Technology: