scholarly journals Effect of gibberellic acid and potassium spray on fruit quality of naval oranges

1998 ◽  
Vol 10 (1) ◽  
pp. 89
Author(s):  
KMFarag KMFarag ◽  
HA Kasem
Keyword(s):  
Gibberellic Acid ◽  
Fruit Quality

Effects of trellising, crown bunch handling, and the number of oil emulsion and gibberellic acid sprays on harvest-pruned sultanas

1979 ◽  
Vol 19 (96) ◽  
pp. 122 ◽  
Author(s):  
RA Sarooshi ◽  
EA Roberts
Keyword(s):  
Gibberellic Acid ◽  
Fruit Quality ◽  
Early Spring ◽  
Bud Burst ◽  
Single Wire ◽  
Oil Emulsion ◽  
Oil In Water ◽  
Water Sprays ◽  
Dried Fruit

Effects of trellising together with the use of various foliage wire arrangements on the production and quality of harvest-pruned sultanas were studied over 4 years. In one experiment a single wire and four narrow 0.4 m 'T' trellis systems, and in a second experiment four 0.9 m wide 'T' trellis and one 0.4 m narrow 'T' trellis system, were tested. Other treatments superimposed on all trellises included crown bunch removal in early spring or at harvest pruning, one and two alkaline oil-in-water sprays (oil sprays) and gibberellic acid (GA) or no GA spray. There were no differences between the four narrow trellises. Dried fruit yield of these four trellises was greater than that of the single wire by an average of 27%, because of higher bunch and cane numbers. There were also no differences between the four wide trellises except that two of the complex ones had more canes. The narrow trellis NTI (used in both experiments) yielded 27% less than the wide trellises because of fewer bunches per vine, caused by lower cane numbers and fruitfulness. Trellising had no effect on fruit quality and only marginal effects on rate of fruit drying, most probably due to low vigour of the experimental vines. As the complex trellis systems had no advantage over the simpler two wire 'T' trellises, their use in harvest pruning is not advocated. In both experiments two oil sprays produced slightly better fruit quality with faster drying of fruit. Use of two oil sprays is warranted where fruit has to be dried rapidly to minimise risk due to rain damage. Early crown bunch removal did not reduce yield and the best time for bunch removal was 6 weeks after bud burst. Use of GA in harvest pruning is not recommended as it does not improve fruit quality and in some years leads to slower fruit drying.

Effects of gibberellic acid on growth, yield and fruit quality of fig (Ficus caricaL.)

2017 ◽  
pp. 183-188
Author(s):  
A.R. Kurubar ◽  
T.B. Allolli ◽  
M.K. Naik ◽  
S.G. Angadi
Keyword(s):  
Gibberellic Acid ◽  
Fruit Quality ◽  
Growth Yield

scholarly journals Effects of Preharvest Gibberellic Acid Applications on Fruit Quality of ‘0900 Ziraat’ Sweet Cherry

2009 ◽  
Vol 19 (1) ◽  
pp. 127-129 ◽  
Author(s):  
Fatih A. Canli ◽  
Hikmet Orhan
Keyword(s):  
Gibberellic Acid ◽  
Fruit Quality ◽  
Sweet Cherry ◽  
Prunus Avium ◽  
Soluble Solids ◽  
Pedicel Length ◽  
Yellow Color ◽  
Solids Content ◽  
Optimum Application

The objective of this study was to determine the effects of gibberellic acid (GA3) applications on fruit quality of ‘0900 Ziraat’ sweet cherry (Prunus avium), a low cropping and a large-fruited variety. ‘0900 Ziraat’ trees were sprayed with 0, 15, 20, and 25 ppm GA3, when the fruit were at their straw-yellow color stage. Fruit quality was evaluated at harvest in terms of size, firmness, pedicel length, and soluble solids content (SSC) to determine the optimum application. Fruit treated with GA3 were significantly larger and firmer than the controls. There were no differences in fruit firmness within the different levels of GA3 treatment; however, fruit treated with 20 and 25 ppm GA3 were significantly larger than the fruit treated with 15 ppm GA3. Trees treated with the optimum concentration of GA3 (25 ppm) in two different locations yielded fruit with 13.4% and 14.1% greater weight and 38% and 25% higher firmness. GA3 treatments did not affect pedicel length. The effect of GA3 application on SSC was complex; there was a significant interaction between GA3 and location. Being firmer than the controls, the GA3-treated fruit could be harvested at a later date than the controls.

scholarly journals Gibberellic acid combined with hand pollination increases ‘Red’ and ‘Lessard Thai’ sugar apple fruit quality and produced parthenocarpic ‘Gefner’ atemoya fruits

2019 ◽  
Vol 49 (9) ◽  
Author(s):  
Marlon Cristian Toledo Pereira ◽  
Silvia Nietsche ◽  
Jonathan Henry Crane ◽  
Wanda Montas ◽  
Célia Lúcia Siqueira ◽  
...  
Keyword(s):  
Gibberellic Acid ◽  
Fruit Quality ◽  
Fruit Set ◽  
Apple Fruit ◽  
Fruit Weight ◽  
High Quality ◽  
Hand Pollination ◽  
Fruit Setting ◽  
Natural Pollination

ABSTRACT: The present research aimed to evaluate the effect of applying gibberellic acid (GA3) with hand (HP) or natural pollination (NP) on fruit set and the fruit quality of ‘Red’ and ‘Lessard Thai’ sugar apple and ‘Gefner’ atemoya fruits.This study was performed in an experimental orchard located in Homestead, Florida, USA. The experimental design included randomized blocks, with eight treatments, four replicates and four plants per plot. Treatments included: (1) HP; (2) HP + 10 mg L-1 GA3; (3) HP + 100 mg L-1 GA3; (4) HP + 1,000 mg L-1 GA3; (5) NP; (6) NP + 10 mg L-1 GA3; (7) NP + 100 mg L-1 GA3 and (8) NP + 1,000 mg L-1 GA3. The HP plus 1,000 mg L-1 GA3 promoted fruit setting above 90% over the 14 weeks for all genotypes evaluated. Significant increments for length and total fruit weight were observed. ‘Red’ sugar apple and atemoya had a reduced number of seeds per fruit. The NP plus GA3 (1,000 mg L-1) was effective in producing high quality seedless ‘Gefner’ atemoya fruits. This investigationdemonstratedthat GA3 plus hand pollination produced high quality sugar apple and atemoya seeded fruits and in association with natural pollination promoted seedless ‘Gefner’atemoya fruits.

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