Jana Youssef *⁽¹⁾ and Badie Samra ⁽¹⁾

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

(*Corresponding author: Jana Youssef E-mail: janayoussef719@gmail.com)

Received:1/12/2022                 Accepted:16/01/2023

Abstract: 

This research was carried out at an agricultural field in Safita countryside, Tartous, 310 meters above sea level during the summer of 2021 to study the effect of treatments with gibberellic acid on the growth and productivity of eggplant (Solanum melongena L.). This experiment was designed according to the randomized complete block design which included (5) treatments. Each treatment was replicated (4) times, and each replicate included (20) plants. Gibberellic acid-GA3 concentrations (0-100-200-300-400 ppm) were used as a foliar spray. The results showed that the treatment T3 (gibberellic acid 200ppm) was significantly superior in plant height (89.66) cm, number of secondary branches (12.35 branches/plant), number of leaves (116 leaf/plant), productivity (5.42) kg/m², number of flowers (41.5) flower/plant, fruit-set % (95.17)%, the percentage of fruit content of dry matter (12.30%), and its content of vitamin C (10.95) mg/100g in comparison with the rest of the studied treatments. The treatment with T2 (gibberellic acid 100 ppm) showed a significant difference over the rest of the treatments in most traits while the values of the control treatment were significantly lower than most of the treatments in all the studied traits; Therefore, the application of foliar spray of gibberellic acid at (200 ppm) concentration can improve the growth and productivity of the “Humsi” eggplant cultivar under field cultivation condition similar to the Safita region.

Keywords: Eggplant, Gibberellic Acid,  Growth Traits,  Production.

Full paper in Arabic: pdf