BEHAVIOUR OF SUPERIOR GRAPEVINES TO APPLICATION OF SOME REST BREAKING AGENTS AND WINTER PRUNING II- EFFECT OF TIMES OF WINTER PRUNING AND DIFFERENT VINE LOADS

Document Type : Research articles.

Authors

1 Hort. Dept. Fac. of Agric. Minia Univ. Egypt

2 Viticulture Res. Hort. Res. Instit. ARC, Giza, Egypt

Abstract

This study was conducted during 2011/2012 and 2012/2013 seasons to
adjust the best date of winter pruning (24th Dec., 31st Dec. or 7th Jan.) as well as
vine load levels (66, 72, 78 or 84 eyes/vine) that responsible for gaining higher
yield with fairly good berries quality of Superior grapevine cv.
Delaying dates of winter pruning from 24th Dec. to 7th Jan. considerably
enhanced the perentages of bud burst and fruiting buds, yield, shot berries%,
T.S.S.%, and reducing sugars% and reduced leaf area, wood ripening
coefficient, total chlorophylls and N, P, K, berry weight and total acidity%. All
the investigated characteristics except bud burst%, berry weight and total
acidity% were gradually increased with increasing vine loads from 66 to 84
eyes/vine.
Pruning on 7th Jan. leaving 84 eyes/vine (6 fruiting cane x 12 eyes plus
6 renewal spurs x two eyes) gave the best results with regard to productivity of
Superior grapevine cv.

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