Grapevine Royal Ruby - Seedless Grape, Late Ripening

ORIGIN: The Ruby Seedless variety was bred by crossing the varieties Emperor x Pirovano 75 at the agricultural experiment station in Davis, USA.   DISTRIBUTION: It has been propagated on larger areas in the USA and Italy. It was introduced to Bulgaria in 1984. and has been propagated in several regions of the country for model introduction.   BOTANICAL DESCRIPTION: - BUDBREAK - glabrous, with slight bronze colouring along the edge.  - Mature shoot (cane) - the shoot is medium thick to thick, glabrous, wine-red coloured in places at the nodes, more strongly coloured towards the tip.  - Developed leaf - the leaf blade is medium-sized, five-lobed, moderately cut, smooth, glabrous. the upper sinuses are deep, closed with an elliptical opening or open, lyre-shaped with a narrow opening. The lower sinuses are shallow, open in the shape of an angle or lyre-shaped. The petiolar sinus is open, lyre-shaped with a narrow opening and a pointed base.  - Bunch - large, conical or winged, moderately compact. The weight of one bunch is about 1000 g, individual bunches reach 2-3 kg.  - Berry - medium-sized, oval. The berry skin is thick, tough to tender, coloured reddish-red to dark red. The texture is firm, fleshy, with a pleasant neutral taste. The berries are completely seedless. The average weight of one berry is about 5 to 6 g.   AGROBIOLOGICAL CHARACTERISTICS: The Ruby Seedless or Royal Ruby variety belongs to the group of very late varieties. Its grapes ripen around the middle of October. The vines are vigorous with very high fertility. In California, spur pruning to two buds is recommended. The bunches are thinned, leaving 200-300 berries per bunch. To increase the size of the berries, treating the bunches with gibberellin is recommended.   TECHNOLOGICAL CHARACTERISTICS: The grapes have great transportability and storability. It stores very well in refrigerators. The variety is a typical seedless table grape. The seeds have poorly developed rudiments. Suitable for fresh consumption, for making compotes, jams, preserves, cocktails and more.