Sweet Cherry (<i>Prunus avium</i> L.) Fruit Drop Reduction by Plant Growth Regulators (Naphthalene Acetic Acid NAA and Gibberellic Acid GA<sub>3</sub>) — Oak Academic Publishing
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Sweet Cherry (<i>Prunus avium</i> L.) Fruit Drop Reduction by Plant Growth Regulators (Naphthalene Acetic Acid NAA and Gibberellic Acid GA<sub>3</sub>)
Agricultural Scientific Research Center in Lattakia, General Commission for Scientific Agricultural Research, Damascus, Syria
,
Horticulture Department, Faculty of Agriculture, Tishreen University, Lattakia, Syria
,
Administration of Horticulture Research, General Commission for Scientific Agricultural Research, Damascus, Syria
1 Agricultural Scientific Research Center in Lattakia, General Commission for Scientific Agricultural Research, Damascus, Syria
2 Horticulture Department, Faculty of Agriculture, Tishreen University, Lattakia, Syria
3 Administration 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 Dam ascus, to reduce fruit drop of sweet cherry. The experiment included 4 foliar applications: T1: control, T2: GA 3 (100 ppm), T3: NAA (20 ppm), T4: (100 ppm GA 3 + 20 ppm NAA). Fruit set and fruit drop pe rcentage, fruiting factor, and yield were recorded. The results showed that treatment with (100 ppm GA 3 + 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, co mpared to the control (9.13, 6.60 kg/tree). Therefore, it can be concluded that GA 3 + 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 cu ltivars (Bing and Hardy Giant) respectively, compared to the control (80.92% and 80.64%).
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