The grape variety (also Elmer Swenson 439, ES 439) is a complex interspecific new breed between Minnesota 78 ( beta x Witt ) x Seibel 11803 ( Rubilande ). They are genes from Vitis aestivalis. Vitis cinerea. Vitis labrusca. Vitis lincecumii. Vitis riparia. Vitis rupestris and Vitis vinifera contain. The crossing of the hybrid was done in 1962 at the University of Minnesota by the vine grower Elmer Swenson (1913-2004). The variety protection was granted in 1978. She was a cross partner of many other new breeds, including from Chisago,
The medium-ripening vine is susceptible to both mildews and Botrytis, but particularly resistant to frost to minus 35 ° Celsius. A special feature is the different degree of ripeness of the berries, depending on the weather, from green to blue on a grape. It produces white and rosé wines with a light touch Foxton, But it is mainly used as table grape and the production of grape juice used. The variety is grown in the US states Iowa (2 ha), Minnesota (10 ha), Oregon and Wisconsin, as in Canada grown. In 2010, the United States A total of 11 hectares of vineyards are shown (Statistics Kym Anderson ).
Images: Ursula Brühl, Doris Schneider, Julius Kühn Institute (JKI)