Effect of crop load management and canopy architecture on yield and fruit quality of late-season plum ‘Angeleno’

Gala apple (Malus domestica Borkh.) trees are prone to heavy cropping but respond to chemical fruitlet thinners to reduce crop load and improve fruit quality. Environmental concerns over the fate of the chemical fruitlet thinner carbaryl is widely acknowledged, but crop load management options are limited. In southern Ontario, Gala trees were treated with new thinning compounds or combinations to determine post-bloom thinning efficacy and resulting fruit quality. Treatments included 6-benzyladenine (6-BA) combined with naphthaleneacetic acid (NAA) or abscisic acid (ABA), and 1-aminocyclopropane-1-carboxylic acid (ACC) alone applied at 9 mm in 2014 and 17 mm in 2015. The treatment NAA + 6-BA produced unacceptably small “pygmy” fruit when applied at 17 mm fruitlet diameter. ABA at 150 and 300 mg L−1 and ACC at 150 mg L−1, when applied at 17 mm fruitlet diameter, resulted in acceptable fruit set, crop load, and quality results in comparison with the carbaryl thinner in 1 yr. The bioregulators ACC and ABA combined with 6-BA showed commercial potential for thinning Gala fruit but require further evaluation.

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Effect of time of harvest on alternate cropping yields and fruit quality of Valencia orange trees

Australian Journal of Experimental Agriculture ◽

10.1071/ea9780461 ◽

1978 ◽

Vol 18 (92) ◽

pp. 461 ◽

Cited By ~ 2

Author(s):

PT Gallasch

Keyword(s):

Fruit Quality ◽

South Australia ◽

Mature Fruit ◽

Late Season ◽

Valencia Orange ◽

The Common ◽

Orange Trees ◽

Early Harvest ◽

Time Of Harvest

At Loxton, South Australia, early harvest of heavy, and late harvest of light, Valencia orange crops was compared with the common practice: early harvest of light and late harvest of heavy crops. These treatments were compared with two years of early, mid- or late season harvests. Early harvest of heavy and late harvest of light crops changed the 3.1:1.0 alternate cropping cycle to 1.1:10 and increased the light crop by 101 per cent compared with the common district practice which gave a 3.2 : 10 cycle. Consistent early and mid-season harvests reduced the alternate cropping ratio to 1.3 : 1.0 and 1.4 : 1.0 respectively, produced 14 per cent more fruit than the common district practice and avoided harvesting the light crop late, when fruit quality is poor. Mature fruit weights from trees consistently harvested late were 27 per cent lower than those trees harvested mid-season.

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Regulation of source: sink relationship, fruit set, fruit growth and fruit quality in European plum (Prunus domestica L.)—using thinning for crop load management

Plant Growth Regulation ◽

10.1007/s10725-011-9606-x ◽

2011 ◽

Vol 65 (2) ◽

pp. 335-341 ◽

Cited By ~ 22

Author(s):

Claudia Seehuber ◽

Lutz Damerow ◽

Michael Blanke

Keyword(s):

Fruit Quality ◽

Fruit Set ◽

Fruit Growth ◽

Load Management ◽

Prunus Domestica ◽

Crop Load ◽

Source Sink

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Interaction of nutrient supply and crop load of apple trees (Malus domestica Borkh.)

International Journal of Horticultural Science ◽

10.31421/ijhs/14/1-2./778 ◽

2008 ◽

Vol 14 (1-2.) ◽

Author(s):

E. Szűcs ◽

T. Kállay

Keyword(s):

Fruit Quality ◽

Analysis Data ◽

Fruit Weight ◽

Apple Trees ◽

Crop Load ◽

Nutrient Contents ◽

General Terms ◽

P Content ◽

Foliar Nutrient

Long term fertilisation trials were combined with storage experiments with 'Jonathan' apple trees and fruits to study influence of tree nutrition on quantity and quality of crop. The site of experiments is a typical Carpathian-basin environment with loamy silt soil, high lime content and arid summers. Conclusions has been drown from six years' set of data. Augmented levels of soil fertilisation increased cropping capacity of apple trees, however, the fruit load has not met with cropping capacity in every year. More the def cit came into view in crop load, less the fruit quality resulted in. The deficit in cropping capacity, however, could not have been determined with simple rates as fruit weight per trunk circumference or similar. Better determination was obtained where foliar nutrient contents were correlated to crop per tree figures. In general terms, the N and Ca content in leaves increased with yields when K and P content formulated reciprocally. When storage quality of 'Jonathan' apple fruits were related to crop load (kg/tree), influence of crop deficit became visible. As the crop load and foliar nutrient levels interacted, the fruit quality (number of disordered apples after 6 month of storage) subjected of both physiological phenomena. Higher determination degree were obtained when crop load was assessed together with single or multiple foliar analysis data.

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Influence of Crop Load on Tree Growth, Yield, and Fruit Quality of Scab Resistant Apples at Harvest

10.31274/farmprogressreports-180814-2351 ◽

2012 ◽

Author(s):

Dennis Katuuramu ◽

Gail R. Nonnecke ◽

Paul A. Domoto

Keyword(s):

Fruit Quality ◽

Tree Growth ◽

Growth Yield ◽

Crop Load

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Response of guava var. Arka Amulya to branch bending during winter and summer in the Eastern tropical region of India

Journal of Environmental Biology ◽

10.22438/jeb/42/3/mrn-1581 ◽

2021 ◽

Vol 42 (3) ◽

pp. 720-726

Author(s):

D. Samant ◽

◽

K. Kishore ◽

Keyword(s):

Fruit Quality ◽

Block Design ◽

Control Plant ◽

Quality Parameters ◽

Total Phenolic ◽

Tropical Region ◽

Canopy Architecture ◽

Humid Climate ◽

Comparative Response

Aim: The study aimed to evaluate the comparative response of guava var. Arka Amulya to branch bending practice during winter and summer for controlling shoot vigour and improving flushing, yield, and quality of harvest under hot and humid climate of Odisha. Methodology: The experiment was laid out in a Randomized Block Design with five treatments consisting of branch bending during first week of January, February, May, June, and without branch bending as control. Each treatment was replicated four times and each replication unit had four plants. Observations were recorded on flushing, flowering, yield, and fruit quality parameters. Results: Branch bending technique was found effective for controlling the shoot vigour and enhancing flushing, flowering, and yield in guava, when practised during January, February, and May, however, effects were more pronounced when branch orientation was manipulated during winter months. January branch bending produced the shortest vegetative shoots (50.48 cm) and recorded the maximum value for flush count (28.91 shoots m-1 branch), flowering (57.91%), and fruit yield (38.46 kg per tree). Branch manipulation during winter resulted in higher yield gains (70.87-81.59%) over control (21.18 kg per tree) as compared to summer months (11.99-42.21%). All the treatments of branch bending caused a significant improvement in various fruit quality attributes, however, May and June treatments excelled in the performance. June bending produced the best quality fruit (TSS: 11.35ºB, Total sugar: 7.85%, Vitamin C: 197.39 mg 100 g-1 pulp, Total phenolic content: 117.29 mg GAE 100 g-1 FW, and total flavonoid: 52.74 mg QE 100 g-1 f. wt.), followed by May bending. Interpretation: In guava, canopy architecture manipulation through branch bending appears to hold immense potential for enhancing the quantum and quality of produce, if practised at suitable time. Practising this technique after May month would not give significant yield gain over the control plant.

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