Effect of foliar application of ga3 and NAA for reducing alternate bearing of olive trees (Olea europaea L. cv. ashrasie)‎

Abstract EN

Gibberellic acid (GA3) (75, 100 and 125) mg.l-1 and Naphthaleneacetic acid (NAA) (50, 100) mg.l-1 alone or in combination were added to olive trees Cv.

Ashrasie as foliar application after 15 days from fruit set for two season 2009-2010, 2010-2011, to evaluate their possible effects on reducing alternate bearing of olive trees.

Fruits were 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, fruit set, yield and oil of olive trees cv.

ashrasie.