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This study was conducted to evaluate the effect of spraying some growth regulators (CPPU at 15 ppm and GA3 at 100 ppm), some antioxidants (Amino acids at 0.50 g/L, citric acid at 500 ppm and ascorbic acid at 500 ppm) and active dry yeast at 10 g/L on yield and fruit quality of Seewy date palm during 2015 and 2016 seasons. The experiment was set up in a complete randomized block design with seven treatments and ten replicates, one bunch per each. Date palm were sprayed three times, at the 1 week of May, June and July. Foliar application had a positive effect on yield and fruit quality of Seewy date palm. The best results were obtained with spraying GA3 at 100 ppm and CPPU at 15 ppm for increasing bunch weight, yield/palm, fruit weight, fruit length and diameter. On the other hand, spraying amino acids at 0.50 g/L and yeast at 10 g/L significantly increased TSS%, total sugars contents, and significantly decreased tannins %, total acidity % and fruit moisture content. So, it can be concluded that spraying GA3 or CPPU combined with any amino acid, yeast, citric acid or ascorbic acid three time (1, 2 & 3 month of pollination time) increased the palm yield and improved the fruit quality of Seewy date palm.

Effect of Antioxidants, Growth Regulators and Yeast Spraying on Fruiting of Seewy Date Palms