Stock Photo - PRODUCTION - 02 September 2022, Rhineland-Palatinate, Neustadt: Ulrich Fischer, the head of the Department of Viticulture and Oenology at the Dienstleistungszentrum Ländlicher Raum (DLR) in Neustadt an der Weinstraße, holds a Riesling grape in his hand. Fischer is researching fungus-resistant grape varieties (piwis) that are less susceptible to disease than Riesling and other classic grape varieties. (to dpa: ""No shying away from Piwis - demand for new grape varieties booming"") Photo: Peter Zschunke/dpa-Zentralbild/dpa. - Neustadt/Rhineland-Palatinate/Germany

Stock Photo: PRODUCTION - 02 September 2022, Rhineland-Palatinate, Neustadt: Ulrich Fischer, the head of the Department of Viticulture and Oenology at the.

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