Cultivation of table grapes in greenhouses under polyethylene wrap

Abstract

The article summarizes first findings on cultivation of dessert grapevine
cultivar 'Victoria', 'Italia' and 'Red Gloube' in the greenhouse covered with
plastic wrap in the conditions of south Bulgaria. It has been established that
phenophases of their development begin earlier, and proceed much more
rapidly, as compared to cultivationin in the open air. Development of sufficiently long shoots allows shaping grapevine bushes at an early stage during
the first vegetation period. In the second and third years of their cultivation
in the greenhouse, the grapes of the studied cultivars reach consumer ripeness approximately one month earlier than the grapes grown in the field.
The yield from one bush increases from 2–5 kg in the second year to 7–10
kg in the third. The grapes obtained demonstrated strong, economically
significant agro-biological and technological characteristics.