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Concord grapes are a cultivar derived from the grape species Vitis labrusca (also called fox grape) that are used as table grapes, wine grapes and juice grapes. They are often used to make grape jelly, grape juice, grape-flavored soft drinks, and candy. The grape is sometimes used to make wine, particularly kosher wine, though it is not generally favored for that purpose due to the strong "foxy" (sometimes described as candied-strawberry/musky) flavor. Traditionally, most commercially produced Concord wines have been finished sweet, but dry versions are possible if adequate fruit ripeness is achieved.
The skin of a Concord grape is typically dark blue or purple, and often is covered with a lighter-coloured "bloom" that can be rubbed off. It is a slip-skin variety, meaning that the skin is easily separated from the fruit. Concord grapes have large seeds and are highly aromatic. The Concord grape is particularly prone to the physiological disorder Black leaf.
In the United States 417,800 tons were produced in 2011. The major growing areas are the Finger Lakes District of New York, Lake Erie, Lake Ontario, Southwestern Michigan, and the Yakima Valley in Washington.
Concord grapes are often used to make grape jelly and are only occasionally available as table grapes, especially in New England. They are the usual grapes used in the jelly for the traditional peanut butter and jelly sandwich, and Concord grape jelly is a staple product in U.S. supermarkets. Concord grapes are used for grape juice, and their distinctive purple color has led to grape-flavored soft drinks and candy being artificially colored purple while methyl anthranilate, a chemical present in Concord grapes is used to give "grape" flavor. Recently, white grape juice with a milder flavor and less ability to stain fabric, primarily from Niagara grapes, has risen in popularity at the expense of Concord juice. The dark colored Concord juice is used in some churches as a non-alcoholic alternative to wine in the service of communion. Concord grapes have been used to make Kosher wine and Sacramental wine. The oldest sacramental winery in America, O-Neh-Da Vineyard, still produces a concord wine for the altar. Non-toxic sprays that contain methyl anthranilate, the smelly part of the Concord grape, can be sprayed on the bushes as a cost-effective bird control management. The spray repellent renders the fruit and foliage unpalatable to the birds.
The Concord grape was developed in 1849 by Ephraim Wales Bull in Concord, Massachusetts. Bull planted seeds from wild Vitis labrusca and evaluated over 22,000 seedlings before finding what he considered the perfect grape, the original vine of which still grows at his former home. The pollen parent is unknown. Although Concord is frequently considered to be basically a Vitis labrusca cultivar, some have argued that the hermaphrodite flowers suggest at least a small amount of Vitis vinifera in its pedigree. This trait has not been proven to exist in any native American grapes. Recent genetic testing has confirmed that Concord has roughly 1/3rd Vitis vinifera parentage. However, Concord is definitely much more labrusca-like in its characteristics than vinifera-like. Many consider the likely male parent to have been Catawba, itself probably half labrusca, which Bull had growing nearby.
In 1853, Bull's grape won first place at the Boston Horticultural Society Exhibition. It was then introduced to the market in 1854. Dr. Thomas Bramwell Welch developed the first Concord grape juice in 1869. Through the process of pasteurization, the juice did not ferment. Welch originally introduced the grape juice to his church, to be used for communion.
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