Washington model helps predict cold injury to grapes

12/13/2012 05:35:00 PM
Vicky Boyd

critical cold temperatures for grapesCourtesy Washington State UniversityWashington State University has developed cold hardiness tresholds for about 20 wine and concord grape varieties."The weather outside is frightful....Let it snow, let it snow, let it snow."

Cold weather may be a good subject for a song, but it can play havoc on winegrapes.

Washington State University has established critical cold hardiness temperatures for about 20 varieties of wine and juice grapes and posted them on a website, http://wine.wsu.edu, according to a news release.

Users can click on each variety to view weekly temperature graphs taken at the WSU Irrigated Agriculture Research and Extension Center 5 miles north of Prosser and at nearby commercial vineyards.

The information was taken from buds and canes (node positions 4-7).

Of course, temperatures in your vineyard may vary.

The university is providing the service with partial funding from the Washington Association of Wine Grape Growers through the Washington Wine Industry Foundation and the Washington State Concord Grape Research Council.

On its website, Washington State University issues a disclaimer that it isn't responsible for any damage from the use or misuse of its information.

WSU's AgWeatherNet also has developed a new model for predicting grapevine cold hardiness in multiple locations throughout the state. View the video on YouTube.

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