Rotberger

Rotberg (Vitis vinifera ) is a red variety. It is a cross between Trollinger ( Schiava Grossa ) and Riesling, the Heinrich Birk succeeded at the Geisenheim Research Institute in the Rheingau 1928. The details of the breeder to the crossing parents could be confirmed in the meantime by DNA analysis.

The new breed of plant variety protection achieved in 1969 and in 1971 entered in the list of varieties. The vigorous growing vine forms strong avarice drives, making them susceptible to powdery mildew ( Oidium ). It needs deep, fine earthy, not too dry soil, flowers and ripens late. It produces strong, the Trollinger similar but richer body, fragrant and fruity wine from bright red color. Furthermore, it is considered good variety for the production of rosé. The wine plays mainly as a waste and for the production of red sparkling wine a role.

Small regions of only about 18 ha are in the Ahr, in the Rheingau, Rheinhessen and on the mountain road. In 2001, another 25 acres were collected. In Trentino, South Africa, New Zealand, Canada and the United States comes before the vine.

See also the article viticulture in Germany, Viticulture in Italy, viticulture in South Africa, viticulture in New Zealand, viticulture and winemaking in Canada in the United States and the list of grape varieties.

It should not be confused with the variety Rotburger, a synonym name of Zweigelt.

• Synonym: breeding line number Geisenheim 3-37 or 3-37 Gm
• Ethnicity: Trollinger x Riesling

Ampelographic varietal characteristics

In the ampelography the habit is described as follows:

• The shoot tip is open. She is hairy and white wool of whitish- green color. The light bronze spotted young leaves ( Anthocyanflecken ) are hairy only slightly woolly and green in color.
• The medium size, dark green leaves ( see also the article sheet form) are five-lobed and medium deep sinuate. The petiole is lyres -shaped open closed until they overlap. The leaf margin serrate pointed. Compared to other varieties, the teeth are set moderately dilated. The leaf surface (also called lamina ) is vesicular coarse.
• The slightly conical grape medium in size and dichtbeerig. The roundish berries are medium to large in size and of a bluish - red color.

DerRotberger casts out late and usually escapes so the late spring frosts. The winter frost resistance is moderately good. The strong vigorous variety can provide very good returns. Generally, however, also applies to Helfensteiner: if the vine is not pruned correctly (→ Training system ), there is a risk to high yields with the concomitant reduction in quality. The yield, at high 100-150 hectoliters / hectare lie.

They often reach medium-high must weights. On average, the must weight a few degrees Oechsle is above the Blue Portuguese.

The flowering period is late. The Rotberg matures only a few days after Chasselas, and thus is still considered an early ripening. It can be harvested shortly after the Portuguese. Rotberg is a variety of the noble vine (Vitis vinifera ). It has hermaphrodite flowers and is thus self- fruiting. When the wine-growing economic disadvantage is avoided, no return delivered to have male plants grow.

Dissemination

The vineyards in Germany distributed in 2007 as follows among the various regions:

Source: Statistics vineyard of 13 March 2008, Federal Statistical Office, Wiesbaden, 2008 Descriptive list of varieties of the Federal Plant Variety Office, 2008, page 198ff.