New App Helps Growers Determine Stunted Vine Causes

Stunting caused by water stress. Photo by Patty Skinkis
Stunting caused by water stress.
Photo by Patty Skinkis

Stunted grapevines are a big concern for growers, and they often assume pests such as rust mites are to blame.

But that’s not always the case, according to Oregon State University Viticulture Extension Specialist Patty Skinkis.

“They [growers] had coined a term, ‘Short Shoot Syndrome,’ that we later linked to rust mite feeding, but not all vineyards have stunting due to this pest,” she says. “We wanted to break that association of stunting with a single pest.”

To do so, Skinkis and her colleagues developed an Extension publication and coordinating app outlining various abiotic and biotic factors that can cause stunted vine growth. She says the publication and app are unique because they look at problems based on symptoms, rather than many other Extension guides, which outline symptoms associated with a single pest or disease.

“This publication and app is one of the first that is an information tool that works backwards from the symptom,” she says.

The interactive app works by providing indexed information that allows growers to navigate through different causes and symptoms to help narrow down the possible issues they’re having in the vineyard. A photo gallery is provided that allows growers to zoom in on pictures to see if the symptoms might be comparable to what their vines are experiencing.

“But we caution the heavy reliance on pictures, as they are just an example, and there can be different symptom expression across multiple vines or a whole vineyard,” Skinkis says.

Once growers have downloaded the app, they don’t need an Internet connection to access it, which is beneficial to those who might have poor mobile service in the field, she adds.

Ultimately, Skinkis hopes the information provided in the publication and app will help growers more accurately determine the cause of their stunted grapevines and treat them accordingly, rather than just spraying.

“The premise under which the content for the Extension guide and associated app was developed was to avoid having growers assume that the stunting is due to microscopic rust or bud mites and apply a pesticide to control a pest that may not be present and/or may not be causing the symptoms,” she says.

For growers who do not have a smartphone, the information is available in an online PDF.

Topics: , ,

Leave a Reply

Grapes Stories
Grapes
April 19, 2017
Donnell Brown Named President of National Grape & Wine Initiative
New president brings experience in wine industry communications. Read More
Grapes
March 28, 2017
Understanding the Economics Of Red Blotch in Grapes
An economist and a plant pathologist team up to help growers understand the threshold for action when a vine is diagnosed with the virus. Read More
Grapes
March 6, 2017
Washington Announces Record Winegrape Harvest
‘Cabernet Sauvignon’ is the leading grape variety, accounting for more than a quarter of the total harvest. Read More
Grapes
February 26, 2017
Winegrowers See Total Sustainability in Their Sights
Sonoma County Winegrowers eyes 2019 to become the U.S.’s first completely sustainable wine region. Read More
Grapes
February 18, 2017
Sustainability Is a Growing Factor in Wine Purchasing
California Sustainable Winegrowing Alliance updates certification program, shows sustainability is important part of wine trade. Read More
Grapes
February 17, 2017
Washington Organization Rebrands Itself
Washington Association of Wine Grape Growers unveils new identity at convention, now known as Washington Winegrowers Association. Read More
Grapes
February 14, 2017
2016 California Winegrape Crush Up 9%
Prices were up 12%, and red wine grapes continue to gain on white wine grapes in popularity, though ‘Chardonnay’ remained king. Read More
Grapes
January 30, 2017
Is the Intelligent Vineyard the Future of Winegrape Growing?
In the high desert of Arizona grows the world’s biggest viticulture laboratory. Read More
Grapes
January 30, 2017
Future Herbicide Injury Concerns Winegrape Growers
While new formulas of herbicides are released in conjunction with herbicide-tolerant corn, cotton, and soybean varieties to reduce risk of drift and crop injury, winegrape growers worry some row crop farmers will opt for older formulations. Read More
Grapes
January 27, 2017
How to Match the Fence to Your Vineyard
Follow these tips to determine how much fence you’ll need. Read More
Grapes
January 20, 2017
Live Reports on the State of the Wine Industry
The Unified Wine & Grape Symposium, by far the nation’s largest winegrape conference, is happening this week in Sacramento, CA. Read More
Grapes
January 19, 2017
U.S. Challenges Canadian Trade Measures Allege Discrimination against U.S. Wine
Trade enforcement action challenges British Columbia regulations that unfairly exclude U.S. wine from grocery store shelves. Read More
Grapes
January 6, 2017
Meet Wendy Brannen, New Executive Director of the Lodi Winegrape Commission
Commodity association veteran believes she has found a home with the Lodi Winegrape Commission. Read More
Grapes
January 5, 2017
There are Many Factors Affecting Table Grapes
The loss of table grape berries from their pedicels, or cap stems, during packing, shipping, postharvest storage, or at the Read More
Grapes
January 4, 2017
Grape Growers Say Season Affected by Weather, Water, and Regulation Woes
Grape growers see challenges this past growing season. Read More
The Latest
Grapes
May 19, 2017
Researchers Still Have a Lot to Learn ab…
While some feeding habits have been recognized, there’s still a learning curve with this enigmatic invasive pest. Read More
Grapes
April 25, 2017
Examining the Effectiveness of Biologica…
Growing conditions in the East are breeding grounds for pathogens, and coupled with highly susceptible Vitis vinifera cultivars proves to make sustainable grape growing practices a challenge. Read More
Grapes
April 20, 2017
Would You Be Willing to Pay More for Org…
While consumers might be ready to fork over more for organic produce, study says the feeling isn't quite the same when it comes to the adult beverage. Read More
Grapes
April 19, 2017
Donnell Brown Named President of Nationa…
New president brings experience in wine industry communications. Read More
Grapes
March 28, 2017
Understanding the Economics Of Red Blotc…
An economist and a plant pathologist team up to help growers understand the threshold for action when a vine is diagnosed with the virus. Read More
Grapes
March 6, 2017
Washington Announces Record Winegrape Ha…
‘Cabernet Sauvignon’ is the leading grape variety, accounting for more than a quarter of the total harvest. Read More
Grapes
February 26, 2017
Winegrowers See Total Sustainability in …
Sonoma County Winegrowers eyes 2019 to become the U.S.’s first completely sustainable wine region. Read More
Grapes
February 18, 2017
Sustainability Is a Growing Factor in Wi…
California Sustainable Winegrowing Alliance updates certification program, shows sustainability is important part of wine trade. Read More
Grapes
February 17, 2017
Washington Organization Rebrands Itself
Washington Association of Wine Grape Growers unveils new identity at convention, now known as Washington Winegrowers Association. Read More
Grapes
February 14, 2017
2016 California Winegrape Crush Up 9%
Prices were up 12%, and red wine grapes continue to gain on white wine grapes in popularity, though ‘Chardonnay’ remained king. Read More
Grapes
January 30, 2017
Is the Intelligent Vineyard the Future o…
In the high desert of Arizona grows the world’s biggest viticulture laboratory. Read More
Grapes
January 30, 2017
Future Herbicide Injury Concerns Winegra…
While new formulas of herbicides are released in conjunction with herbicide-tolerant corn, cotton, and soybean varieties to reduce risk of drift and crop injury, winegrape growers worry some row crop farmers will opt for older formulations. Read More
Grapes
January 27, 2017
How to Match the Fence to Your Vineyard
Follow these tips to determine how much fence you’ll need. Read More
Grapes
January 20, 2017
Live Reports on the State of the Wine In…
The Unified Wine & Grape Symposium, by far the nation’s largest winegrape conference, is happening this week in Sacramento, CA. Read More
Grapes
January 19, 2017
U.S. Challenges Canadian Trade Measures …
Trade enforcement action challenges British Columbia regulations that unfairly exclude U.S. wine from grocery store shelves. Read More
Grapes
January 6, 2017
Meet Wendy Brannen, New Executive Direct…
Commodity association veteran believes she has found a home with the Lodi Winegrape Commission. Read More
Grapes
January 5, 2017
There are Many Factors Affecting Table G…
The loss of table grape berries from their pedicels, or cap stems, during packing, shipping, postharvest storage, or at the Read More
Grapes
January 4, 2017
Grape Growers Say Season Affected by Wea…
Grape growers see challenges this past growing season. Read More