Influence of spraying kalamata and picual olive trees with GA3 and ZnSO4 on productivity and some fruit properties

Abstract

This work was performed to study the effect of spraying Kalamata and Picual olive trees with the aqueous solution of GA3 at (0.0, 20 and 40 ppm) or ZnSO4 at (0.0, 0.5 and 1%) and their companions on trees productivity and fruit properties. Treatments were applied when fruits reached about two third of their commercial volume, the (beginning of final swelling stage). Data obtained revealed that values of average yield as (kg/ tree) for Kalamata olive trees received GA3 at 40 ppm alone surpassed those of the other tested treatments. Also, values of average fruit weight (g) and volume (cm3), flesh/ stone ratio and dry oil percent were enhanced due to these two treatments (GA3 at 40 ppm alone or coupled with ZnSO4 at 0.5%). As for the Picual trees, the maximum increase in yield and flesh oil percentage resulted from applying GA3 at 40 ppm alone. The highest values of fruit weight and volume and flesh /stone ratio were obtained in trees sprayed with GA3 at 40 ppm coupled with ZnSO4 at 1%. © 2016, Sphinx Knowledge House. All right reserved.