The Corvinone, also called "Cruinon", is a complementary and optional grape variety in the blend of Valpolicella wines. A vineyard can be composed up to 50% by it in substitution of the same percentage of Corvina.
- Semi-erect growth habit.
- Five-lobed elongated leaf with long jaggy "teeth" and an open-V petiolar sinus.
- Medium-large sized grape cluster whose weight can reach 400 -500 grams, pyramidshaped, winged.
- Large ellipsoid berry with a thick, hard, dark-blue and pruinose skin.
Phenology and agronomical characterics
From a phenological point of view it does not substantially differ from Corvina: it's a late bud break variety with a medium-late ripening (end of September – beginning of October). Vigour is good, sometimes high, and the productivity is good and regular; Corvinone, although to a lesser degree than Corvina, shows low fertility of basal buds of the vine shoot and for this reason it needs vine training systems which allow annual change of the vine shoot and long pruning. Very sensitive to downy mildew, moderately sensitive to powdery mildew. Less sensitive than Corvina to water stress but like Corvina susceptible to sunburn damages of the berries if directly exposed to the sun's rays.
Good suitability of the grapes for drying.
No historical hints were found for Corvinone, for the fact that in the past it was considered the same as Corvina. This variety has been well-rooted in the Veronese culture since ancient times, being a variety used both for the Valpolicella as well as for the Bardolino blends. Until 1993 is was considered a clone of Corvina but with the latest techniques in genetic analysis it was demonstrated that, on the contrary, Corvinone and Corvina are different varieties.
The availability of Corvinone clones is limited if compared to Corvina but nonetheless of a good qualitative potential; nowadays the clone selections recognized are: Rauscedo 8, ISV-CV 2, ISV-CV 3, ISV-CV 7, VCR 18.
Excellent graft compatibility with Kober 5BB, SO4, 420A and 1103P; good with 140 Ru and 41B.