Currant Istok

Mid-early ripening variety, obtained at the Kokinsky Experimental Station of the VSTISP from crossing the varieties Yadrnaya and Exotika. Authors: I.V. Kazakov, F.F. Sazonov, A.N. Zarubin. Under state variety testing since 2008.

Medium-height, medium-spreading, medium-density bush. Woody stems are medium, straight, yellow-brown, hairless, shiny.

Three-lobed leaf, medium-sized, dark green, leaf blade wrinkled, matte, bare. Lobes are pointed with small notches, angle between veins of side lobes is straight. Base is open. Teeth are short, blunt, not curled.

Flowers are medium-sized with pale coloration. Sepals are medium, curled upward. Hair on the outer side is absent. Inflorescence is medium (5-7 cm), number of berries per cluster — 6-8, densely arranged. Inflorescence axis is medium, straight, hairless.

Berries are very large (average mass 1.7 g, maximum — 4.2), round, black, shiny, with average seed count, dry detachment, high transportability. Flavor is tart-sweet, refreshing. Berry stalk is medium, green, thin. Chemical composition: dry solids — 11.6%, total sugars — 3.8%, titratable acidity — 2.9%, ascorbic acid — 169.0 mg/100 g.

Winter-hardy, sufficiently self-fertile, resistant to main diseases and pests, universal use. Yield up to 12.0 tons of berries per hectare.

Advantages of the variety: high productivity (2.7-3.0 kg of berries per bush), large berry size, dry berry detachment, synchronized ripening, and good transportability.

Disadvantages of the variety: insufficient resistance to bud mite.