Author(s)

Ammar Askarieh¹, Sawsan Suleiman², Mahasen Tawakalna³

¹Agricultural Scientific Research Center in Lattakia, General Commission for Scientific Agricultural Research, Damascus, Syria.
²Horticulture Department, Faculty of Agriculture, Tishreen University, Lattakia, Syria.
³Administration of Horticulture Research, General Commission for Scientific Agricultural Research, Damascus, Syria.

This study was conducted during 2019/2020 on sweet cherry trees (Prunus Avium L.) (Bing and Hardy Giant) cultivar planted at Sergaya-Al_Zabadani area of Rural Damascus, to reduce fruit drop of sweet cherry. The experiment included 4 foliar applications: T1: control, T2: GA₃ (100 ppm), T3: NAA (20 ppm), T4: (100 ppm GA₃ + 20 ppm NAA). Fruit set and fruit drop percentage, fruiting factor, and yield were recorded. The results showed that treatment with (100 ppm GA₃ + 20 ppm NAA) recorded higher fruit set percentage (73.81% and 75.62%), and fruiting factor (48.38% and 50.04%) respectively; In addition to fruit yield (40.19 and 41.21 kg/tree) for both cultivars, compared to the control (9.13, 6.60 kg/tree). Therefore, it can be concluded that GA₃ + NAA treatment reduced Sweet cherry fruit drop better than other treatments, where fruit drop percentage didn’t exceed (63.11% and 62.01%) in both cultivars (Bing and Hardy Giant) respectively, compared to the control (80.92% and 80.64%).

Sweet Cherry, Naphthalene Acetic Acid (NAA), Gibberellic Acid (GA3), Fruitset, FruitDrop

Askarieh, A. , Suleiman, S. and Tawakalna, M. (2021) Sweet Cherry (Prunus avium L.) Fruit Drop Reduction by Plant Growth Regulators (Naphthalene Acetic Acid NAA and Gibberellic Acid GA₃). American Journal of Plant Sciences, 12, 1338-1346. doi: 10.4236/ajps.2021.129094.