Cracking and Fruit Quality of Pomegranate (Punica granatum L.) As Affected by Pre-Harvest Sprays of Some Growth Regulators and Mineral Nutrients
An experiment was carried out during 2011 and 2012 seasons to study the effect of foliar application by using some growth regulators (paclobutrazol at 300 ppm, gibberellic acid (GA3) at 80 ppmand NAA at 40 ppm) and mineral nutrients (3% Ca as calcium chloride (CaCl2), 0.3 % boron as boric acid and 0.3 % Zn as zinc sulphate (ZnSO4) after two and eight weeks from full bloom on yield, fruit cracking% and quality in pomegranate cultivar ‘Manfalouty’. The extent of fruit cracking was reduced significantly with application of 300 ppm pacloputrazol, while grain %, fruit juice %, TSS % and acidity % were increased. Yield and fruit weight were increased with applying pacloputrazol or by using (3 % Ca + 0.3 % B + 0.3 % Zn). Application of 40 ppm NAA and 80 ppm GA3 significantly increased fruit length and fruit diameter.Application of 80 ppm GA3 significantly increased total anthocyanin %, while tannins % was not affected by other two growth regulators.