Fruit Set and Development in Potted Tomato, Lycopersicon Lycopersicum (L.) Karsten, Treated with Gibberellic Acid (Ga3)

The study was conducted to determine the most effective concentration of Gibberellic Acid (GA₃) that promotes fruit setting and fruit development as well as the flower development that is most responsive to GA₃ The cost and benefit analysis of the treatments was also done. Seven concentrations (O, 5, 10, 20, 40, 80, and 160 ppm) were sprayed to the flower clusters during pre-anthesis and post-anthesis. The study was laid in a 2x7 factorial experiment replicated three times, each with five hills per replicate. Fruit setting was highest in tomato plants sprayed with 10 ppm GA₃ during post-anthesis. Applying five ppm GA₃ during pre-anthesis or post-anthesis significantly improved tomato production among other treatments based on yield and return on investment (ROI) The cost and benefit analysis showed that applying GA₃ was not costly and gave more than 200 % ROI in treated tomatoes.