Fruit Set and Quality of 'Canino' Apricot Fruits as Affected by Spraying With Yeast, Growth Regulators and Micronutrients

Abstract

This experiment was carried out during 2014 and 2015 seasons on 'Canino' apricot trees grown in sandy soil under drip irrigation system in a private farm at El-Bostan region in Behera governorate, Egypt to study the effect of foliar spraying with Yeast (0.1 and 0.2%), Benzyladenine (50 and 100 ppm), GA3 (50 and 100 ppm), Boric acid (25 and 50 ppm) and flower power (2 and 4%) at full bloom stage on fruit set and fruit quality. Results showed that spraying 'Canino' trees with BA at 100 ppm followed by Boric acid (25 ppm) as well as GA3 (50 ppm) gave the highest significant fruit set in comparison to control. Fruit weight, volume, length, width and fruit flush weight were significantly increased as result of GA3 at 50 ppm, Flower power (4%) and GA3 (100 ppm) treatments respectively. Moreover, firmness of fruits obtained from BA at 50 ppm and Flower power at 4% treatments were significantly higher than control. The data also reveal that applied treatments had no significant effect on fruit shape index (L/W). Concerning the results of fruit kernel properties, it was noticed that, GA3 at 50 ppm, boric acid (25 ppm) and flower power (2%) treatments were more effective to enhance 'Canion' kernel properties. Treatments of BA at 100 ppm and Yeast at 0.1 % as well as Flower power at 4% increased SSC (%) and SSC/acid ratio. However, all treatments significantly decreased acidity percentage comparing with control fruits. It can be concluded that, most of the studied parameters were enhanced with foliar applications of GA3 at 50 ppm, BA at 100 ppm and Flower power at 4% at full bloom stage of 'Canino' apricot trees in comparison with control treatment.

Does application of naphthenic acids in early fruit development stage result in prolonged effect on cold storage and shelf life of apricot fruit?

“…Effects of application of plant hormone cytokinin on fruit weight and volume were also widely studied with less consistent results obtained by different authors. Apricot fruit weight and diameter were increased by 100 and 150 ppm BA treatments (Canli et al, 2014), but 50 ppm BA concentration did not have an effect (Abdel-Mohsen & Kamel, 2015). The dependence of applied concen-trations of BA is also similar to the behavior of applied NAs in our experiment.…”

Effects of foliar application of gibberellic acid, boric acid and sucrose on noni (M. citrifolia L.) fruit growth and quality

“…Due to lower cell volumes and much concentrated cell sap, smaller fruits from the control treatments in this study may have had adequate levels of sugars in their cells which was comparable to the sugar levels in the chemically treated fruit cells. Increase in fruit TSS with an application of BA and GA 3 have also been reported by Moradinezhad et al (2019), Ganai et al (2018), Ferdosi and Farooq (2017), Shaban et al (2017), Adbel-Mohsen andKamel (2015), and Sharma (2011). The important role of BA and GA in translocation of photosynthate in fruit trees have been reported by Han et.al (2008) and Zhang et al (2007), respectively.…”

Consequences of NAA, BA and GA3 treatment in early fruit development phase on postharvest properties of apricot cv. NS4

“…Pol. Hortorum Cultus, 21(5), 49-59. https://doi.org/10.24326/asphc.2022.5.5 Devrari et al 2017] and cytokinin (benzyladenine) [Abdel-Mohsen and Kamel 2015] were proven to control fruit set.…”

“…Application of PGRs was extensively investigated in production of diverse fruits including apricot. Experiments involving application of PGRs on apricots fruit quality at harvest are abundantly presented in academic literature regarding application of auxin [Son 2004, Stern et al 2007, Taghipour et al 2011, Devrari et al 2017, Roussos et al 2021, gibberellin [Abdel-Mohsen andKamel 2015, Devrari et al 2017] and cytokinin [Canli et al 2014, Abdel-Mohsen and Kamel 2015, Roussos et al 2021]. However, studies regrading postharvest behavior of treated fruit after PGRs application are quite scarce.…”

“…Application of PGR as a part of production practice could change, or even reverse naturally occurring ripening processes, leading either to improvement or deterioration of fruit quality [Abdel-Gawad and Romani 1974]. Gibberellic acid was proven to delay flower induction and control fruit set and regulate thinning [Abdel-Mohsen andKamel 2015, Devrari et al 2017]. Both, synthetic auxins (naphthaleneacetic acid, naphthaleneacetamide) [Son 2004, Taghipour et al 2011,…”