Search

This study was carried out during the two successive seasons of both 2018 and 2019 on 5-year-old Flame Seedless grapevines in a private vineyard located at Kom Hamada - Beheira Governorate, Egypt. The trees were spaced at 1.5 x 3 m apart and irrigated by drip irrigation system and received similar cultural practices adapted in the orchard. The present investigation aimed at study yield and quality of table grapes cv. "Flame seedless" as affected by bud break and pre-harvest treatments. This experiment consisted of sixteen treatments arranged in factorial experiment in Randomized Complete Block Design (RCBD) with four replicates for each treatment and one tree for each replicate. The experiment consisted of 16 treatments (Control, Garlic oil at 1 %, Urea at 2 %, Dormex at 4 %, Abscisic acid at 400 mg/ l, Ethrel at 250 mg/ l, Gibberelic acid 250 mg/ l, Garlic oil at 1 % + ASA at 400 mg/l , Garlic oil at 1 % + Ethrel at 250 mg/l, Garlic oil at 1 % + GA3 at 250 mg/l, Urea at 2 % + ASA at 400 mg/l, Urea at 2 % + Ethrel at 250 mg/l , Urea at 2 % + GA3 at 250 mg/l, Dormex at 4 % + ASA at 400 mg/l , Dormex at 4 % + Ethrel at 250 mg/l and Dormex at 4 % + GA3 at 250 mg/l . Results revealed that spraying dormex at 4%, recorded the best values of cluster weight and yield/plant, physical characters i.e. (berry length, berry diameter, weight of100 berry, size of 100 berry and fruit firmness), and all chemical compositions i.e. (total sugars, reducing sugars, anthocyanin content and vitamin c), also, abscisic acid 400 mg/l gave the highest mean values of cluster weight, yield/plant and anthocyanin content, while Ethrel at 250 mg/l recorded the maximum values of physical characters i.e. (berry length, berry diameter, weight of100 berry, size of 100 berry and fruit firmness), and all chemical compositions i.e. (total sugars, reducing sugars, and vitamin c), as compared with the control treatment which recorded the minimum values of this studied characters, during both seasons.

This study was carried out during two successive seasons 2016 and 2017 on six years old ‘Wonderful’ pomegranate trees (Punica granatum L.). Trees were grown on sandy loam soil conditions in a private orchard located at Burg El-Arab, Alexandria governorate, Egypt. The trees were spaced 4x5 m apart and irrigated by drip irrigation system and received similar cultural practices adapted in the orchard. The effect of some growth regulators, nutrient elements and kaolin on cracking and fruit quality of pomegranate ‘Wonderful’ cultivar was studied. The experiment was designed as randomized complete block design with five replicates. Each block contained 11 treatments (control, naphthalene acetic acid (NAA) at 25 and 50 mg/l, gibberellic acid (GA3) at 100 and 150 mg/l, boric acid at 0.1% and 0.3%, calcium chloride at 1% and 2% and kaolin at 4% and 6%). Results revealed that, boric acid at 0.3% gave the highest mean values of fruit set (%), number of fruits/tree, yield (kg/tree) and anthocyanin; while, naphthalene acetic acid at 50 mg/l recorded the maximum mean values of fruit weight, fruit diameter, volume and grain weight, and gave the minimum mean values of fruit drop and fruit cracking (%). On other hand, gibberellic acid (GA3) at 150 mg/l gave the maximum yield (kg/tree), in the second season and the minimum fruit cracking (%), whereas, calcium chloride at 2% gave the best results of TSS (%), acidity (%), and vitamin C, total and reducing sugars were higher than the control for all treatments. Finally, kaolin at 6% gave the lowest percentage of sunburn and the highest percentage of juice, as compared with the control and other treatments during both seasons.