Effect of different levels of buds load on bud behavior and fruit quality of Early Sweet grapevine

Thoraua S. A. Abo-ELwafa

Abstract

This investigation was carried outduring both 2016& 2017 seasons in a private vineyard at El-Khatatba region, Minufyia Governorate to studytheEffect of different levels of buds load on bud behavior and the quality of Early Sweet grapes.The chosen vines were 7-yearold, grown in a sandy soil, spaced at 2 X 3 meters ,irrigated by the drip irrigation system, trellised by the Spanish Parron shape system. Vines were trained to quadrilateral cordon and spur- pruned. Vines pruned to three different levels of bud load (48,72 and 96 buds/vine) and number of buds per fruiting spurs adopted to 2,4and 6 buds/spur .The results showed that (48bud/vine)24spurs ×2 budsincreased bud behavior,physical characteristics , vegetative growth, wood ripening and weight of pruning.In addition,total carbohydrates in canes, however, the levelload of (96 bud/vine) 24spurs ×4 budsgave the highest yield per vinein both seasons. Finlay, the best results was (48 bud/vine) namely 24,12 and 8 fruiting spurs adopted to 2,4and 6 buds/spur,respectively.

Key words

Grapevines, Early Sweet, spur pruned, vegetative growth, yield and quality