Six newly-introduced grape cultivars nemely Arra 30, Arra 29, Arra 13, Arra 24, Arra 27, and Arra 15, were investigated in three successive seasons ( 2014, 2015 & 2016) for description and evaluation under Egyptian conditions.The cultivars were grown in a private vineyard situated at Birqash region -Giza governorate, Egypt. Vines were planted in sandy soil spaced 3X2 meters apart and irrigated by drip irrigation system and supported by Gable system. The study included time of bud burst, young shoots, young leaves, shoot, and time of bloom, flower, mature leaf, beside determining time of ripening, Bunch, berry, Tss, Acidity, Tss / acid ratio, and seed formation.The studied cultivars were characterized by good vegetative growth and good fruit quality.

The present investigation was carried out during three successive seasons (2015, 2016 and 2017)to determine water requirement on growth, yield and fruit quality features of Flame seedless grapevines. In Aga, Dahlia Governorate, Egypt, the chosen vines were seven years old, planted in a clay soil, spaced 2.5×2 meters apart and irrigated by flood system, spur pruned, trained to the quadrilateral cordon and trellised by the pergola system. The vines were pruned during the second week of January with bud load (56 buds/vine).The work in the first year was considered as a preliminary trial and then the experiment proceeded with the same manner during the second and third seasons, respectively. Four levels of irrigation water as follows: irrigation with5000m 3 /Fadden (control), 4500m 3 /Fadden, 4000m 3 /Fadden and 3500m 3 /Fadden. Obtained results revealed that irrigation of Flame seedless grapevines with 4000m 3 /Fadden recorded the highest water use efficiency which it reflected in getting vegetative growth better, increasing yield/vine and improving berry quality attributes of Flame seedless grapevines in both seasons. From the obtained results, it can be recommended that Flame seedless grapevines irrigated with 4000m 3 /Fadden had the best results which it gained a good yield with high fruit quality attributes.

This study was carried out for two successive seasons (2013&2014) in a private vineyard located at Aga-Dakahlia Governrate to evaluate the efficiency of some new alternatives on dormancy breaking of Flame Seedless grapevines. The chosen vines were 5 years old, grown in a clay loam soil, spaced at 2x2.5m , irrigated by flood irrigation system .The vines were pruned during the second week of January for the two seasons of the study to obtain bud load of 72 buds/vine (6 canes x 12 buds/cane)and sprayed on the third week of January by phosphoric acid 2%, sulphoric acid 2%, potassium nitrate 5%, potassium hydroxid 1%, zinc sulfate3%, urea10%, H2O2 1%, dormex 4% and mineral oil7%. The result show that all treatments hastened the beginning of bud burst and significantly shortened the duration of bud burst rather than the control treatment. Dormex at 4% was most effective as it gave about 95% bud burst.

The present investigation was conducted during the period from 2001 to 2006, to study the influence of some grape rootstocks on Superior cultivar. Two stages were involved in this study; the first included bench grafting of Superior cultivar on Dogridge, Salt creek, Freedom, Harmony, SO4, Teleki 5C, Paulsen 1103 rootstocks. The following determinations were carried out: percentage of grafting success, vegetative growth of shoots and roots, fresh and dry weight, relative water content, chlorophyll and cation exchange capacity as compared to own-rooted plants. The second stage included the performance of Superior on different rootstocks to study their influence on yield, physical characteristics of bunch & berries, TSS & acidity and morphological characteristics of vegetative growth, coefficient of wood ripening, weight of prunings, trunk volume, leaf content of mineral elements, cane content of total carbohydrates and coefficient of bud fertility.The results showed that the percentage of grafting success was around (66.7-86.5%) according to rootstocks in all seasons. All rootstocks under study increased the vegetative growth, root length, fresh and dry weight, relative water content, chlorophyll and cation exchange capacity in grafted plants as compared to own-rooted ones. The increase in yield and improvement of grapes in grafted vines ranged between (14.2-36.8%) as compared with those of own-rooted plants according to rootstocks and seasons. Moreover, all rootstocks under study improved the characteristics of vegetative growth, coefficient of wood ripening, weight of prunings, trunk volume, leaf content of mineral elements, cane content of total carbohydrates and coefficient of bud fertility especially Dogridge, Salt creek, Paulsen 1103 and Freedom rootstocks compared to non grafted vines.

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