Influence of Abscisic Acid and Benzyladenine on Fruit Set and Fruit Quality of ‘Bartlett’ Pears

Experiments were conducted to evaluate abscisic acid (ABA) and the combination of ABA and benzyladenine (BA) as a thinner on ‘Bartlett’ pears. Application of 500 mg·L−1 ABA at bloom, petal fall, and at the 10-mm stage resulted in significant fruit thinning at all timings. Application at the 10-mm stage nearly defruited the trees. Rates of ABA between 50 and 500 mg·L−1 were evaluated at 10 mm and the thinning response was quadratic and highly significant. Rates as low as 50 mg·L−1 thinned. BA at 150 mg·L−1 at the 10-mm stage did not thin and when combined with 250 mg·L−1 ABA, no additional thinning was observed, but extensive thinning was done by the ABA alone. When thinning with ABA was achieved, return bloom was also enhanced. Thinning with ABA generally resulted in larger fruit, greater flesh firmness, and higher soluble solids. The russet seen on ABA-treated fruit was attributed primarily to the surfactant used. Extensive leaf yellowing and leaf abscission were noted after ABA application, especially with the 250 mg·L−1 and 500 mg·L−1 and this was considered commercially unacceptable. BA was unable to reverse or modify the leaf yellowing and abscission caused by ABA as it has been shown to do with other plant species.

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Effect of Abscisic Acid and Benzyladenine on Fruit Set and Fruit Quality of Apples

HortScience ◽

10.21273/hortsci.46.4.604 ◽

2011 ◽

Vol 46 (4) ◽

pp. 604-609 ◽

Cited By ~ 18

Author(s):

Duane W. Greene ◽

James R. Schupp ◽

H. Edwin Winzeler

Keyword(s):

Abscisic Acid ◽

Fruit Quality ◽

Fruit Set ◽

Fruit Size ◽

Leaf Abscission ◽

Red Color ◽

Leaf Yellowing ◽

Return Bloom

Experiments were conducted over a 5-year period to determine the effects of abscisic acid (ABA) and benzyladenine (BA) applied alone and in combination on fruit set, fruit quality, and return bloom of ‘McIntosh’ and ‘Fuji’ apples. ABA thinned in 3 of the 5 years used and it thinned ‘McIntosh’ when applied at bloom, petal fall, and at the 10-mm fruit size stage. On ‘Fuji’, ABA thinned over a range of concentrations from 150 to 1000 mg·L−1. It caused leaf yellowing on ‘McIntosh’ but not on ‘Fuji’. When BA was applied with ABA on ‘McIntosh’, even at a rate as high as 1000 mg·L−1, it either dramatically reduced or prevented leaf yellowing and leaf abscission. The usefulness of applying BA with ABA was inconclusive because of variability in thinning response. ABA advanced surface red color on ‘McIntosh’ and when combined with BA, it reversed the reduction in red color caused by BA.

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186 INFLUENCE OF HYDROGEN CYANAMIDE AND WILTH IN ON BLOSSOM THINNING OF APPLE AND PLUM

HortScience ◽

10.21273/hortsci.29.5.455f ◽

1994 ◽

Vol 29 (5) ◽

pp. 455f-455

Author(s):

Esmaeil Fallahi ◽

Brenda R. Simons ◽

Max W. Williams

Keyword(s):

Fruit Quality ◽

Fruit Set ◽

Fruit Size ◽

Soluble Solids ◽

Full Bloom ◽

Mature Trees ◽

Hydrogen Cyanamide ◽

Fruit Thinning ◽

Yield And Quality

Effects of hydrogen cyanamide and Wilthin on blossom thinning and the consequences of thinning on fruit set, yield and fruit quality of `Rome Beauty' was studied. A full bloom application of hydrogen cyanamide at the rate of 0.25% (Dormex formulation) or 0.25% of Wilthin both followed by a fruit thinning by Sevin + NAA effectively thinned mature trees of `Rome Beauty' and had a similar effect on fruit set, yield and fruit quality. The effects of these two chemicals at these rates on several aspects of fruit set, yield and quality were similar to the effects of Elgetol. Hydrogen cyanamide, Elgetol and 0.25% Wilthin at full bloom resulted in a higher percentage of single fruit set, thus, less labor for hand thinning. Application of 0.37% Wilthin at 20% bloom or at full bloom resulted in larger fruit size, but induced fruit russetting. Soluble solids of fruit from trees with Elgetol, 0.37% Wilthin at 20% bloom or at full bloom were higher than fruit from other treatments. Hydrogen cyanamide at 0.50% resulted in a satisfactory level of blossom thinning in `Friar' plums.

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Abscisic acid on the quality of tomato fruits

Scientia Agraria Paranaensis ◽

10.18188/sap.v19i1.22876 ◽

2020 ◽

Vol 1 (1) ◽

pp. 38

Author(s):

Carlos Agostinho Balate ◽

Douglas Correa de Souza ◽

Luis Felipe Lima e Silva ◽

Luciane Vilela Resende ◽

Sergio Tonetto de Freitas ◽

...

Keyword(s):

Abscisic Acid ◽

Fruit Quality ◽

Tomato Fruit ◽

Titratable Acidity ◽

Physicochemical Characteristics ◽

Quality Parameters ◽

Soluble Solids ◽

Exogenous Aba ◽

Root Treatment

The use of abscisic acid (ABA) in agriculture has increased in the last few years due to the increase in ABA commercial availability at lower costs. The objective of this study was to determine the effect of exogenous ABA on tomato fruit quality parameters such as soluble solids (SS), total and soluble pectins, titratable acidity (TA) and flesh firmness. Tomatoes from the cultivar ‘Santa Clara’ were the study followed a complete randomized block desig, with four treatments in five repetitions. The treatments were plants not treated with ABA (control), foliar sprayed with ABA at 500 mg L-1, 150 mL drench with ABA at 500 mg L-1, or foliar plus drench treated with ABA. After harvesting, the physicochemical characteristics of the fruits were evaluated in the laboratory. All treatments were weekly applied to the plants from anthesis to harvest at fully maturity. Root treatment increased SS by up to 26.12%, increased ratio SS/TA, firmness and decreased soluble pectin. According to the results, it can be concluded that the application of ABA to leaves and roots can improve fruit quality by increasing the SS, ratio SS/TA. The method of application affects the SS content.

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Influence of the main stem pruning and fruit thinning on quality of melon

Revista CERES ◽

10.1590/0034-737x201663060007 ◽

2016 ◽

Vol 63 (6) ◽

pp. 789-795

Author(s):

Rafaella Martins de Araújo Ferreira ◽

Edna Maria Mendes Aroucha ◽

Cristiane Alves de Paiva ◽

José Francismar de Medeiros ◽

Flavinicíus Pereira Barreto

Keyword(s):

Vitamin C ◽

Management Practices ◽

Fruit Size ◽

Titratable Acidity ◽

Main Stem ◽

Soluble Solids ◽

Postharvest Quality ◽

Fruit Thinning ◽

Flesh Firmness

ABSTRACT Among many management practices used in melon crops, those that change source: sink relationship, such as pruning and fruit thinning, directly influence production, affect fruit size and its composition, including sugar and vitamin contents. The objective of this study was to evaluate the influence of pruning of the main stem and time of fruit thinning in melon postharvest quality. Thus, two experiments were set up in Mossoró, state of Rio Grande do Norte, each with a melon hybrid (Amaregal and Banzai). Each experiment was conducted in a randomized block, in a (2 x 4) + 1 factorial design, 2 pruning management (with and without pruning), 4 levels of fruit thinning (3, 6, 9 and 12 DARB - days after removal agro textile blanket) and a control (without pruning and thinning), and four replications. Fruits were harvested at commercial maturity and transported to the Laboratory of Food Technology of UFERSA, where they were evaluated for the following characteristics: weight, diameter, length, flesh thickness, flesh firmness, soluble solids, pH, and titratable acidity, soluble solids: titratable acidity ratio and vitamin C. No interaction between factors in any of the experiments was found. Titratable acidity (0.077%) and vitamin C content (3.4 mg/100 g) in Amaregal melon and soluble solids (10.2%) in Banzai melon were lower in the treatments with stem pruning. In Amaregal melon, fruits showed longer length (134 mm) and greater flesh firmness (40 N) when thinning was carried out on 6 DARB, and as thinning was delayed, it found a decrease in the values of soluble solids, SS: TA ratio and pH. In Banzai melon, fruits showed greater flesh thickness (33.5 mm) and SS: TA (247.5) ratio when thinning was carried out on 6 DARB. However, delay in thinning promoted an increase in pH and vitamin C content of the fruits. Pruning of the main stem and thinning season had effect on the quality of Amaregal and Banzai melons in different ways.

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Fruit set, development and maturation.

Guava: botany, production and uses ◽

10.1079/9781789247022.0010 ◽

2021 ◽

pp. 203-213

Author(s):

Rosemary J. du Preez

Keyword(s):

Fruit Quality ◽

Management Practices ◽

Fruit Set ◽

Soluble Solids ◽

Chemical Application ◽

Guava Fruit ◽

Yield And Quality ◽

Phenological Cycle ◽

Productivity Gains

Abstract This chapter describes the guava fruit as well as the fruit set, growth, drop, harvesting, yield and quality (total soluble solids, total acids and ascorbic acid). Understanding the phenological cycle of guava and the effect of management practices on yield and fruit quality allows management practices to be modified to develop strategies which should lead to productivity gains for different pruning or chemical application times. As the effects of various treatments and times of application on yield and fruit quality for different cultivars and climatic zones are known, it is possible to decide on the optimum time to apply treatments knowing what the quality of the fruit will be, the time that the fruit will be harvested, expected yield and the critical times to apply management practices.

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Impact of Chemical and Non-Chemical Thinning Treatments on Yield and Fruit Quality of Date Palm

Journal of Food Research ◽

10.5539/jfr.v4n4p18 ◽

2015 ◽

Vol 4 (4) ◽

pp. 18

Author(s):

Mohamed S. Al Saikhan ◽

Abdel-Kader A. Sallam

Keyword(s):

Fruit Quality ◽

Date Palm ◽

Fruit Set ◽

Block Design ◽

The Other ◽

Alternate Bearing ◽

High Quality ◽

Fruit Thinning ◽

Thinning Process

The fruit thinning process is employed for the production of high quality large-sized fruits and prevent the production of compact bunches. It is also one way to reduce the alternate bearing habits in date palm. In this study, seven thinning treatments (i.e. without spraying water after pollination, spraying water at 3 minutes after 3, 4 and 5 h, spraying Ethephon at 0, 500 and 1000 ppm after ten days from pollination) are used for Khalas and Ruzeiz date palm cultivars. The factorial experiment in a randomized completely block design with three replicates was done. The results reveal that, spraying water after mechanical pollination has reduced fruit set% and increased fruit shees%. Most thinning treatments reduced fruit yield/palm in both Khalas and Ruzeiz. Spraying water after 5 h enhanced fruit quality compared with the other thinning treatments in besr and tamr stages. Spraying with ethephon at 1000 ppm gave the increased sugars content and TSS, whereas reduced the moisture content in besr stage. Spraying water after 5 h from mechanical pollination or Ethephon at 1000 ppm after 10 days are suitable for obtaining economic yield with best fruit quality.

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Postharvest quality of ‘Galaxy’ apples submitted to the treatment with 1-MCP and different cooling times between harvest and cold storage

Ciência Rural ◽

10.1590/0103-8478cr20160926 ◽

2017 ◽

Vol 47 (8) ◽

Author(s):

Crizane Hackbarth ◽

Cristiano André Steffens ◽

Cassandro Vidal Talamini do Amarante ◽

Mayara Cristiana Stanger ◽

Auri Brackmann

Keyword(s):

Relative Humidity ◽

Fruit Quality ◽

Cold Storage ◽

Skin Color ◽

Titratable Acidity ◽

Soluble Solids ◽

Postharvest Quality ◽

Flesh Firmness ◽

And Storage

ABSTRACT: In this research it was evaluated if the use of 1-methylcyclopropene (1-MCP), associated to different cooling times between the harvest and storage, replaces the pre-cooling in ‘Galaxy’ apples. Treatments were arranged in a factorial scheme, combining the following factors: application of 1-MCP (with or without) and different times between harvest and cooling (24 hours, 96 hours, 144 hours and 192 hours in 2013; and 24 hours, 48 hours, 144 hours and 240 hours in 2014). After four months of cold storage (1.0±0.2°C/92±5% RH - Relative Humidity) were evaluated: flesh firmness, texture, titratable acidity (TA), soluble solids (SS) and skin color. Apples treated with 1-MCP showed greater flesh firmness, texture and SS, in both years, and more TA and lower incidence of mealy flesh compared to apples not treated with 1-MCP in 2013. The 1-MCP was effective in maintaining the fruit quality, even with the cooling delay of up to 240 hours. Cooling delay of 192 hours and 240 hours in ‘Galaxy’ apples not treated with 1-MCP should be avoided because it reduces the quality of fruits.

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Growth, Yield and Fruit Quality of Strawberry (Frageria ananasa Dutch) under Different Phosphorus Levels

Research in Agriculture ◽

10.22158/ra.v2n2p19 ◽

2017 ◽

Vol 2 (2) ◽

pp. 19 ◽

Cited By ~ 1

Author(s):

Husain Ahmad ◽

Muhammad Sajjid ◽

Sikandar Hayat ◽

Rizwan Ullah ◽

Muhammad Ali ◽

...

Keyword(s):

Fruit Quality ◽

Fruit Set ◽

Fruit Size ◽

Growth Yield ◽

Soluble Solids ◽

Strawberry Fruit ◽

Fruit Maturity ◽

The University ◽

Phosphorus Levels

Strawberry fruit takes less time for production and is easily multiplied. Fruiting is an exhaustive process and depletes nutrients especially phosphorus as it is highly immobile in the soil. An experiment was conducted in The University of Peshawar, Pakistan to evaluate different level of Phosphorous on growth, yield and fruit quality of Strawberry Cv Chandler. Results show that Phosphorus at 90 kg ha-1 significantly influenced the days to flowering (102.66) of strawberry plants while, at 80 kg ha-1 significantly affected days to fruit set (2.98), days to fruit maturity (20.05), Number of fruits (7.50) and Total fruit yield tons ha-1(3.61). Fruit size (6.42 cm3) was significantly affected at 70 kg ha-1. Similarly, Ascorbic acid (62.61), percent acidity (0.64) and Total soluble solids (7.83) were significantly affected by phosphorus at 60 kg ha-1

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Effect of nutrients sprays on growth, yield and fruit quality of apple under cold desert condition of Himachal Pradesh

Journal of Applied and Natural Science ◽

10.31018/jans.v8i1.789 ◽

2016 ◽

Vol 8 (1) ◽

pp. 297-300 ◽

Cited By ~ 2

Author(s):

L. K. Sharma

Keyword(s):

Boric Acid ◽

Fruit Quality ◽

Fruit Set ◽

Growth Yield ◽

Himachal Pradesh ◽

Soluble Solids ◽

Cold Desert ◽

Total Sugars ◽

Total Soluble Solids

The on farm trial was carried out to study the effect of nutrients sprays on growth, yield and fruit quality of apple cv. Royal Delicious under cold desert condition of Himachal Pradesh. Treatments comprised spray of boric acid (0.1%), urea (0.5%), boric acid (0.1%) + urea (0.5%), multiplex (250 ml/100 litre of water) and no use of nutrients (water spray). The highest growth in terms of shoot length was observed with spray of urea at 0.5% and the highest fruit set and yield were recorded with boric acid (0.1%) + urea (0.5%) followed by boric acid at 0.1%. The lowest growth, fruit set and yield were observed with control. The combination of boric acid (0.1%) + urea (0.5%) resulted in the highest fruit length, breadth and weight. The highest total soluble solids were recorded with boric acid 0.1% and the reducing and total sugars were the highest with control. The acidity was found maximum while total soluble solids, reducing and total sugars were recorded lowest with spray of urea 0.5%. The treatment comprising of boric acid (0.1%) + urea (0.5%) proved to be best in terms of fruit set, yield and quality parameters of apple followed by boric acid at 0.1% concentration.

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Enhanced yield and fruit quality of redglobe grapevines by abscisic acid (ABA) and ethanol applications

OENO One ◽

10.20870/oeno-one.2011.45.1.1484 ◽

2011 ◽

Vol 45 (1) ◽

pp. 13

Author(s):

Yasser A.M.M. Omran

Keyword(s):

Abscisic Acid ◽

Fruit Quality ◽

Untreated Control ◽

Production Efficiency ◽

Soluble Solids ◽

Anthocyanin Content ◽

Ethanol Treatment ◽

Total Anthocyanin ◽

Total Soluble Solids

Aims: Redglobe has become a popular table grape cultivar in Egypt. However, in warm climates the berries often fail to develop a full red color in addition to having lower total soluble solids (TSS) at harvest time. Here we evaluate the potential for enhancing the quality of Redglobe grapes with applications of abscisic acid (ABA) and ethanol under field conditions.Methods and results: Abscisic acid (300 mg/L) and/or ethanol (10% v/v) treatments were applied twice (10% and 75% of colored berries) for two seasons (2006 and 2007), and their effect on yield and fruit quality (TSS/acidity, anthocyanin content, firmness, and attachment force) was investigated. The application of ABA did not significantly affect yield when compared to the untreated control, whereas the ethanol treatment, alone or in combination with ABA, resulted in a significant yield increase. Total soluble solids and the ratio between TSS and acidity were increased by all treatments. The highest TSS/acidity ratio resulted from the ABA treatment due primarily to an 18% decrease in total acidity. In this regard, ABA was the most effective treatment. The total anthocyanin content in berry skins increased by approximately 48 and 38% with the ABA and ethanol treatments, respectively. Still, the highest anthocyanin content was obtained with the application of both ethanol and ABA (54% higher than in the untreated control). Berries that were treated with ethanol were markedly firmer and had higher attachment force than those of the other treatments.Conclusion: The results indicate that the combination of ABA and ethanol is more effective in improving the color of Redglobe grapes but may also increase production efficiency. However, the ethanol treatment alone was more effective in increasing yield and berry firmness and appears to be an alternative to ABA in improving fruit quality in general.Significance and impact of the study: The results obtained in this study will be useful to improve the fruit quality of Redglobe grapes in the field under warm conditions.

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