TITLE:
Sweet Cherry (Prunus avium L.) Fruit Drop Reduction by Plant Growth Regulators (Naphthalene Acetic Acid NAA and Gibberellic Acid GA3)
AUTHORS:
Ammar Askarieh, Sawsan Suleiman, Mahasen Tawakalna
KEYWORDS:
Sweet Cherry, Naphthalene Acetic Acid (NAA), Gibberellic Acid (GA3), Fruitset, FruitDrop
JOURNAL NAME:
American Journal of Plant Sciences,
Vol.12 No.9,
September
8,
2021
ABSTRACT: 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%).