Effect of Different Plastic Sheet Coverings and Pruning Time on Yield and Yield Components of Table Grape "cv. Superior"

Abstract

This study was carried out during two successive seasons in 2007 and 2008 on five years old "cv. Superior" grape cultivar in a private vineyard at El-Noubarya city, Behaira Governorate, Egypt. The vines were grown in sandy soil with spacing of 2m within rows and 3 m between rows under drip irrigation system and trained to cane pruning under baron trellis system. The main factor was the three pruning times [(1st December (P1), 15th December (P15) and 30 th December (P30)] carried during dormant season to ten canes per vine with 12 nodes per cane. Four renewal spurs (2 nodes) were tretained per vine, while the sub main factor was four mulching treatments with sheet cover sleeves air white plastic