Voltis

What it is

Voltis is a white hybrid grape, created in 2002 by France’s INRAE in collaboration with Germany’s Julius Kühn Institute. A PIWI variety: pilzwiderstandsfähig, or fungus-resistant. Not genetically modified. A classical cross between Villaris (itself a German PIWI from 1984) and VRH 3159-2-12, an interspecific hybrid between Vitis vinifera and Muscadinia rotundifolia. Result: 95 percent Vitis vinifera genetic material with resistance genes inherited from wild American Vitis species.

What it does

Fully resistant to powdery mildew (oidium). Near-fully resistant to downy mildew (peronospora). Four resistance genes pyramided together: two against each disease. Polygenic resistance is harder to break than a single gene, raising the expected durability of protection. In practice: up to 85 percent fewer fungicide sprays compared to Chardonnay or Pinot Noir.

Status in Champagne

On 10 February 2022 the INAO approved Voltis for the Champagne AOC, the first disease-resistant grape ever admitted to a French protected designation. Not as an equal to the seven traditional varieties, but within the VIFA framework (Variétés d’Intérêt à Fin d’Adaptation), so on an experimental basis.

Restrictions during the trial period:

• Maximum 5 percent of any estate’s vineyard area
• Maximum 10 percent in any blend
• Trial runs until 2032, followed by INAO evaluation

First plantings in 2023. By May 2026: roughly 10 hectares across about 170 parcels, out of a total Champagne area of 34,000 hectares (0.03 percent).

First harvest

Drappier in the Côte des Bar harvested Champagne’s first commercial Voltis grapes in 2025: 114 litres, one feuillette (half-cask). No fungicide treatments, no visible disease pressure, healthy vines that stayed green later into the season than the classic plots around them. Champagne Lacroix in Châtillon-sur-Marne planted Voltis next to residential buildings, where French legislation increasingly restricts spraying near housing.

Taste

Aromatically neutral. In blends of 5 percent with Chardonnay, panels of nearly 700 tasters described the result as “rounder, simpler, more ready to drink”. Not a substitute for the structure or aroma of Chardonnay; more of a textural component within the assemblage. First commercial Champagne containing Voltis is not expected before 2028-2030.

Why it matters

Champagne has warmed by 1.1 degrees Celsius over 30 years; average acidity has dropped 1.3 g/l. Voltis is not a silver bullet but a tool: for plots near residential areas, for organic growers who want to step away from copper, for zones where spraying becomes practically impossible. If the 2032 evaluation goes well, the limits could ease. If not, all Voltis vines will be pulled up.