Effect of Growth Regulators on Pre-Harvest Fruit Drop in Subtropical Plum Cv. Satluj Purple

Kaur, Harpreet; Randhawa, J. S.; Kaundal, G.S.

doi:10.17660/actahortic.2004.662.50

Cited by 3 publications

(2 citation statements)

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“…[12] and [13] also noticed reduced TSS: acid ratio with the foliar application of GA3 in citrus cultivars. Reports of [14] in guava, [5] in strawberry, [15] in plum also in-line with the reports of present findings.…”

Section: Tss: Acid Ratiosupporting

confidence: 93%

Influence of Naphthalene Acetic Acid, Gibberellic Acid and Calcium Chloride on Quality Parameters of Kagzi Lime (Citrus aurantifolia Swingle)

Patel,

Tripathi

2024

IJPSS

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An experiment was carried out to investigate the influence of Naphthalene acetic acid, Gibberellic acid and Calcium chloride on quality parameters of Kagzi lime (Citrus aurantifolia Swingle) in the Garden, Dept. of Fruit Science, C. S. Azad University of Agriculture and Technology, Kanpur (U.P.) during two cropping seasons i.e., 2021-2022, 2022-2023. The experiment was laid out in Randomized Block Design with three replications and Ten treatments viz, T1-NAA (20 ppm), T2-NAA (40 ppm), T3-NAA (60 ppm), T4-GA3 (10 ppm), T5-GA3 (20 ppm), T6-GA3 (30 ppm),T7-CaCl2 (0.10%),T8-CaCl2 (0.15%),T9-CaCl2 (0.2%) and T10-Control (water spray only). During both years of investigation, it was recorded that GA3 at 20 ppm exhibited significantly higher amount of total soluble solids (9.300Brix) andtitratable acidity (8.70%) as compared to all other treatments. Similarly, NAA treatments also contributed to an increase in the TSS and titratable acidity content with the rise in their concentrations. In terms of TSS: acid ratio, there were no significant differences were recorded within the treatments, indicating its stability. Ascorbic acid content was significantly higher in GA3 treated fruits and with the GA3 at 20 ppm maximum amount of ascorbic acid was recorded (56.47 mg/100ml juice) while the control fruits had the lowest ascorbic acid content. The juice content in fruits were increased in NAA and GA3 treatments, while in CaCl2 treatments it remained relatively stable. Higher amount of juice content (56.49%) was also recorded in fruits treated with GA3 at 20 ppm. In the context of sugar content, GA3 at 20 ppm also exhibited the highest reducing (0.86%), non-reducing (0.70%) and total sugar (1.56%) content in the plains of north India.

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Section: Tss: Acid Ratiosupporting

confidence: 93%

Influence of Naphthalene Acetic Acid, Gibberellic Acid and Calcium Chloride on Quality Parameters of Kagzi Lime (Citrus aurantifolia Swingle)

Patel,

Tripathi

2024

IJPSS

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“…PGRs can be used to mitigate preharvest drop of other fruit species, including apple [Malus ×domestica (Robinson et al, 2010)], plum [Prunus subgenus Prunus sp. (Kaur et al, 2004)], and citrus [Citrus sp. (Nawaz et al, 2008)]; modes of action include delaying fruit maturity via the ethylene biosynthesis inhibiting aminoethoxyvinylglycine [AVG (Layne et al, 2002)] and affecting abscission physiology via a synthetic auxin, 1-napthaleneacetic acid [1-NAA (Nartvaranant, 2018)].…”

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confidence: 99%

Haskap Preharvest Fruit Drop and Stop-drop Treatment Testing

Leisso

Jarrett

Miller

2021

hortte

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Haskap (Lonicera caerulea), also known as honeyberry, is a relatively new fruit crop in North America. To date, most academic activity and research in North America involving haskap has focused on cultivar development and health benefits, with relatively few field experiments providing information to guide field planning and harvest management for the recently released cultivars. In 2020, we documented preharvest fruit drop (PHFD) rates for 15 haskap cultivars planted in a randomized block design at our research center in western Montana with the aim of preliminarily determining whether certain cultivars may be prone to this phenomenon. Additionally, we evaluated two plant growth regulators (PGRs) to reduce PHFD in two cultivars previously observed to have high rates of PHFD. Results suggest cultivar-specific variations in PHFD near berry maturation. Because haskap harvest indices are not well-defined and may be cultivar-specific, we share our 1-year study results as preliminary information and as a call for further research. Cultivars Aurora, Boreal Blizzard, Borealis, Indigo Gem, Kapu, and Tana all had PHFD rates less than 12% of yield, where yield is the weight of berries lost to PHFD plus marketable yield and marketable yield is fruit remaining on the shrub at harvest. Cultivars Chito, Kawai, and Taka had the highest rates of PHFD, although marketable yields were still relatively high, especially for Kawai. We note that ease of fruit detachment is an important consideration in mechanical harvest, and this characteristic could be advantageous if managed appropriately. The PGRs evaluated (1-napthaleneacetic acid and aminoethoxyvinylglycine) did not influence PHFD rates; however, our study was limited by the sample size and by the lack of information regarding haskap abscission physiology. In summary, the haskap cultivars evaluated exhibited variable PHFD rates in the year of the study, and further research is needed to understand haskap fruit maturation, harvest indices, and abscission.

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Comparative analysis of exogenously applied synthetic auxins and micronutrients for effective management of fruit drop and quality improvement in subtropical Japanese plum ( Prunus salicina Lindl.)

Dongariyal,

Dimri,

Singh

et al. 2024

Journal of Plant Nutrition

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Effect of Growth Regulators on Pre-Harvest Fruit Drop in Subtropical Plum Cv. Satluj Purple

Cited by 3 publications

References 0 publications

Influence of Naphthalene Acetic Acid, Gibberellic Acid and Calcium Chloride on Quality Parameters of Kagzi Lime (Citrus aurantifolia Swingle)

Influence of Naphthalene Acetic Acid, Gibberellic Acid and Calcium Chloride on Quality Parameters of Kagzi Lime (Citrus aurantifolia Swingle)

Haskap Preharvest Fruit Drop and Stop-drop Treatment Testing

Comparative analysis of exogenously applied synthetic auxins and micronutrients for effective management of fruit drop and quality improvement in subtropical Japanese plum ( Prunus salicina Lindl.)

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