الفهرس 
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Abstract
The current study was carried out throughout 2011, 2012 and 2013 seasons on 12 years old grapevines of Flame Seedless and White Banaty (Thompson Seedless) cvs. which were grown in an experimental vineyard at Plant Pathology Department, Faculty of Agriculture, Assiut University. It was examined if there is a relationship between spraying garlic oil (1.0 or 1.5%) at two application times (1st time at full bloom of grape cluster and the 2nd time at the beginning of veraison stage of grape berries on bud fertility of the canes of Flame Seedless cv. Moreover, spraying three concentrations of garlic and camphor oils (1.0%, 1.5% and 2% at the two application times concentration on White Banaty (Thompson Seedless) cv. Their effects on yield components, physical and chemical properties of grape berries were studied.
The experiments was conducted as split plot arrangement in one level of CBR design with three replicates, are grapevine each.
The obtained results of this study could be summarized as follows:
1- Spraying camphor and garlic oils at 1.0% or 1.5% on Flame Seedless grape cv. induced a considerable improvement in grape bud fertility of the canes treated from the pruning winter wood. Treatment with 1.5% of camphor oil at the 1st time gave the best results on improving the bud fertility.
2- All the treatments with camphor or garlic oils exhibited significant increase in yield weight (kg) per vine during the 3 studied seasons. The lowest concentrations of both camphor or garlic oil (at 1.0%) gave the heaviest yield weight/vine during the 3 studied seasons. Moreover, the differences between treatments with camphor or garlic oil were insignificant.
3- Camphor or garlic oil sprayed on the two examined grape cvs. at the two application times showed the same trend of their effect on yield weight/vine. All treatments resulted in significant increase in bunch weight (g) of the two studied cvs. spraying 1.0% camphor oil at the 2nd time gave the bet results.
4- Weight and volume of 50 grape berries of the two studied grape cvs. increased significantly as affected with all treatments with camphor or garlic oils during the 3 studied seasons. Spraying 1.0% or 1.5% of camphor or garlic oil at the 2nd time gave the heaviest weight of 50 grape berries. The higher concentration of garlic cv. camphor oil (2.0%) induced less increase in these properties than the other concentrations of the two oils in comparison with untreated control grapevines
5- Spraying garlic oil or camphor oil concentrations at the 1st or 2nd application times significantly increased both of average berry length or average berry diameter of the two examined grape cv. Moreover, there was no significant difference between the application time. On the other hand, the effects of treatments with garlic oil or camphor oil varied significantly among the grape cultivars during the three studied seasons.
6- Spraying camphor or garlic oil caused a considerable increase in grape juice weight and volume of 50 berries of the two studied cvs. during the 3 studied seasons. Spraying 1.0% or 1.5% of camphor or garlic oil exhibited the best results.
7- Treatment with 1.5% of camphor oil at the 2nd time grape the highest significant increase in the total soluble solids percentage (TSS%) in grape juice of the two studied grape cvs. during the 3 times of this study. Moreover, all treatments with camphor or garlic oil exhibited significant increase in the TSS% in grape juice of the two studied cvs. during the three seasons of this study, compared to the TSS% in grape juice of the untreated control vines.
8- The titratable acidity percentage (TA%) in grape juice of both Flame Seedless or White Banaty (Thompson Seedless) significantly decreased in response to camphor or garlic oil treatments. Spraying 1.0% of camphor oil at the 2nd time gave the lowest value of TA% in the grape juice of Flame Seedless in comparison with untreated control grapevines.
9- The results showed that spraying 1.0% or 1.5% of the camphor oil gave the highest value of TSS/TA ratio in grape juice of both the examined cultivars during the seasons of this study compared to its values in grape juice of the untreated control vines.
10- Treatment with 1.5% of camphor oil at the 2nd time resulted in the highest percentage of the total sugars in gape juice of the 2 tested grape cultivars during the 3 studied seasons in comparison with untreated control vines.
Therefore, the conclusive recommendation according to the obtained results of this study is to spray 1.5% of camphor oil at the 1st time (full bloom of the grape cluster) to induce a considerable improvement in bud fertility of Flame Seedless cv. and at the 2nd application time (at the beginning of veraison stage of grape berries) to improve yield weight and grape berry quality of both Flame Seedless and White Banaty (Thompson Seedless) grape cvs. under the same conditions of this study.