Corvina Veronese (also called Cruina or Corvina) is one of the main grape varieties in the blends of Valpolicella wines. It can be part of the composition of a vineyard from 45 to 95%.
- Semi-erect growth habit.
- Medium-sized, five-lobed leaf with lyre-shaped or slightly open "U" petiolar sinus.
- Medium-sized cluster whose weight can reach 200 -250 grams, cylindrical-pyramid in shape, winged.
- Medium-sized ellipsoid berry with a thick, hard black-blue pruinose skin.
Phenology and agronomical characterics
Corvina is a late bud break variety with a medium-late ripening (end of September - beginning of October). Vigour is good and the productivity regular; specific feature of the grapevine is the low fertility of basal buds of the vine shoot, for this reason Corvina needs vine training systems which allow annual change of the vine shoot and long pruning.
It shows average susceptibility to cryptograms but it is considerably sensitive to water stress and to sunburn of the berries.
Good suitability of the grapes for drying.
The exact origin of Corvina is unknown but the first hints of its cultivation in Valpolicella were reported by Pollini in 1824. Undoubtely this grapevine has been part of the Veronese viticulture since very early times, being the main variety used for both Valpolicella and Bardolino blends.
Considering the very old origin of Corvina we have a large genetic variability which has allowed the selection of several clones.
Nowadays the clone selections recognized are: Rauscedo 6, ISV-CV 7, ISV-CV 13, ISV-CV 48, ISV-CV 78, ISV-CV 146.
For their appreciated oenologicalal qualities, the most diffused clones are ISV-CV 7, ISV-CV 48 and to a lesser extent, ISV-CV 13.
Excellent graft compatibility with Kober 5BB, SO4 and 420A; good with 1103P, 140 Ru and 41B.