Dima  khrmashow^(1)*

(1). Department of Horticulture, Faculty of Agricultural Engineering, Tishreen University, Lattakia, Syria.

(*Corresponding author: Dima khrmashow  E-Mail: khrmashowdima@gmail.com

Received: 27/07/2024                   Accepted: 14/10/2024

Abstract: 

  The research was carried out in Latakia – the village of Dbiqa during the 2021 growing season, with the aim of studying the effect of foliar spraying of cucumber plants with the growth regulator naphthalene acetic acid (NAA) on flower growth characteristics. Three concentrations of NAA (150, 100, 50( ppm were used also with control without spraying, and the experiment was designed according to Randomized complete block design, with three replicates per treatment.  The results showed a positive effect of spraying with NAA, as all concentrations used were superior to the control plants. The treatment led to an increase in the total number of flowers and the number of female flowers, in addition to a reduction in the number of male flowers, which contributed to increasing the sex ratio. Spraying with a concentration of NAA of 150 ppm was preferable, as shown. Spraying with a concentration of 150 ppm of NAA has a distinctive role in reducing the number of nodes that precede the first female flower, in addition to its effective effect in increasing the percentage of female flowers and the percentage of stagnant flowers on the plant.

Keywords: Cucumber, Naphthalene Acetic Acid, NAA, Flower growth.

Full paper in Arabic: pdf