Effect of Foliar application of GA3 and NAA for reducing alternate bearing of olive trees (Olea europaea L. cv.Ashrasie)

Abstract

The economic main importance's of olives are; oil and pickle olives. Olive cultivation can be successfully carried out in Iraq, Ashrasie, is one of the most common olive, which is mainly used for green pickles, as foliar application on the trees Gibberellic acid (GA3) (75, 100 and 125) mg.l-1 , Naphthaleneacetic acid (NAA) (50, 100) mg.l-1 in addition of control was done after 15 days after fruit set for two season 2009-2010, 2010-2011, fruit harvested at mid-October. The effect of growth regulators (GA3, NAA) was not uniform in different treatments. However, GA3 (100, 125) mg.l-1 in combination with NAA (50,100) mg.l-1 gave maximum value of most physical characteristics and fruit set and yield and oil of olive trees cv. ashrasie.