scholarly journals Effects of Prohexadione-Ca and GA4+7 on Scarf Skin and Fruit Maturity in Apple

HortScience ◽  
2006 ◽  
Vol 41 (7) ◽  
pp. 1602-1605 ◽  
Author(s):  
Steven McArtney ◽  
Dave Ferree ◽  
John Schmid ◽  
J.D. Obermiller ◽  
A. Green
Keyword(s):  
Fruit Quality ◽  
Economic Benefits ◽  
Quality Parameters ◽  
Fruit Weight ◽  
Single Application ◽  
Early Season ◽  
Fruit Maturity ◽  
Negative Effect ◽  
Series Of Experiments

A series of experiments were undertaken to compare the effects of individual and combined applications of GA4+7 and prohexadione-Ca (P-Ca) on scarf skin and fruit quality parameters on red strains of `Rome Beauty' and `Gala' apples. Three applications of GA4+7 at 10-day intervals beginning at petal fall (PF) significantly reduced scarf skin severity in all experiments. A single application of P-Ca at PF had no effect on scarf skin in one experiment but reduced scarf skin severity in two further experiments. Combining P-Ca with the first of three GA4+7 sprays as a tank mix reduced the severity of scarf skin more effectively than either material alone in two of three experiments at P < 0.05 and in all three experiments at P < 0.10. Combining P-Ca with the first application of GA4+7 as a tank mix generally reduced scarf skin as effectively as applying P-Ca and the first GA4+7 spray two days apart, although in one experiment, greater scarf skin control was achieved when P-Ca was applied 2 days after the first GA4+7 spray. A single application of P-Ca at PF consistently reduced, and three applications of GA4+7 consistently increased, mean fruit weight at harvest compared with the control. The economic benefits as a result of reducing scarf skin severity with P-Ca and GA4+7 sprays will need to be balanced against the negative effect of P-Ca on mean fruit weight. There is no antagonism between early season P-Ca and GA4+7 sprays for scarf skin control, and P-Ca may increase the efficacy of GA4+7 sprays for scarf skin control in apple.

scholarly journals Prohexadione-Ca Reduces Russet and Does Not Negate the Efficacy of GA4+7 Sprays for Russet Control on ‘Golden Delicious’ Apples

HortScience ◽  
2007 ◽  
Vol 42 (3) ◽  
pp. 550-554 ◽  
Author(s):  
Steven McArtney ◽  
J.D. Obermiller ◽  
A. Green
Keyword(s):  
Shoot Growth ◽  
Fruit Size ◽  
Economic Benefits ◽  
Fruit Weight ◽  
Single Application ◽  
Inhibitory Effects ◽  
Fruit Maturity ◽  
Golden Delicious ◽  
Negative Effect ◽  
Prohexadione Calcium

A series of four experiments were undertaken to evaluate the effects of individual and combined applications of prohexadione-Ca (P-Ca) and GA4+7 primarily on fruit russet, but also on fruit set, fruit weight, early season shoot growth, and fruit maturity of ‘Golden Delicious’ apples (Malus × domestica Borkh.). A single application of P-Ca (138 to 167 mg·L−1) at petal fall (PF) reduced the severity of russet in three of the four experiments; however, multiple applications of 20 ppm GA4+7 at 10-day intervals beginning at PF generally reduced russet more effectively than P-Ca. P-Ca did not reduce the efficacy of GA4+7 sprays for russet reduction. However, GA4+7 sprays reduced the inhibitory effects of P-Ca on shoot growth measured 30 days after PF. A single application of P-Ca at PF had no effect on mean fruit weight at harvest. Fruit size was lowest for the combined P-Ca and GA4+7 treatment in every experiment, although there was a significant interaction between P-Ca and GA4+7 sprays on mean fruit weight in only one experiment. There were no consistent effects of P-Ca and GA4+7 sprays, alone or in combination, on fruit maturity parameters at harvest. These data show that a single application of P-Ca at PF reduced russet severity, and the effects of P-Ca and GA4+7 sprays on russet can be additive. The economic benefits resulting from a reduction in russet severity after combined P-Ca and GA4+7 sprays will need to be balanced against their occasional negative effect on fruit size. Chemical names used: prohexadione-calcium [3-oxido-4-propionyl-5-oxo-3 cyclohexenecarboxylate formulated as Apogee (27.5% a.i.)].

scholarly journals Effect of Shading on Red Colour and Fruit Quality in Blush Pears “ANP-0118” and “ANP-0131”

Plants ◽  
2020 ◽  
Vol 9 (2) ◽  
pp. 206 ◽  
Author(s):  
Madeleine Peavey ◽  
Ian Goodwin ◽  
Lexie McClymont ◽  
Subhash Chandra
Keyword(s):  
Visual Assessment ◽  
Quality Parameters ◽  
Fruit Weight ◽  
Soluble Solids ◽  
A Value ◽  
Solids Concentration ◽  
Negative Effect ◽  
Colour Parameters ◽  
Hue Angle ◽  
Colour Development

Some cultivars of Pyrus communis develop mature fruit with a distinctive red blush. Investigating the patterns of pear colour development in response to sunlight has implications for orchard management of these pears. The objectives of these experiments are to study the seasonal patterns of colour development and investigate the influence of shade and sunlight exposure on the red colour and harvest quality of blush pears “ANP-0118” and “ANP-0131”. Several long, medium and short shading treatments were applied at different stages of fruit development from 28 (“ANP-0131”) and 29 (“ANP-0118”) days after full bloom (DAFB) until harvests at 119 DAFB (“ANP-0118”) and 175 DAFB (“ANP-0131”). Fruits were measured every three weeks for colour parameters (a*, hue angle, chroma) and at harvest for quality parameters (fresh weight, visual assessments of percentage blush coverage and blush intensity, flesh firmness and soluble solids concentration). In the unshaded control, red colour increased during the growing season (increase in a* value and decrease in hue angle), as well as increasing in chroma value. Periods of shading during the season negatively affected red colour in both cultivars, as evidenced by significant decreases in a* value and increases in hue angle. Shaded fruits that were subsequently re-exposed to sunlight reacted with a dynamic increase in a* value and decrease in hue angle. Fruit shaded for the length of the experiment or prior to harvest had significantly lower a* values than the control at harvest. Visual assessment at harvest of percentage blush coverage and blush intensity were significantly affected by shading in both cultivars. Shading treatments applied early in the experiment had a negative effect on the fresh fruit weight of “ANP-0118”.

scholarly journals Effect of Pre-Harvest Gibberellic Acid and Calcium Application on Post-Harvest Behaviour of Subtropical Peaches

2018 ◽  
Vol 6 (1) ◽  
pp. 78-84
Author(s):  
Shashi K. Sharma
Keyword(s):  
Shelf Life ◽  
Fruit Quality ◽  
Foliar Application ◽  
Calcium Nitrate ◽  
Quality Parameters ◽  
Fruit Weight ◽  
Fruit Characteristics ◽  
Peach Fruit ◽  
Shelf Life Studies ◽  
Quality And Shelf Life

Shorter shelf life and faster deterioration of fruits after harvest are the major constraints with the peach production in the subtropical regions. Pre-harvest application of GA3 and chloride & nitrate of calcium were tried in a RBD experiment for enhancing peach fruit quality and reducing fruit deterioration during shelf life studies of five subtropical peach cultivars. At harvest fruit quality parameters viz. TSS, acidity, firmness etc. were influenced greatly by the treatments. Other physical properties of the fruit such as fruit weight, size and yield were not influenced much. Physiological weight loss during storage and the deterioration of other fruit characteristics were considerably lowered by calcium treatments. Foliar application of Calcium nitrate (1%) was found to be superior over calcium chloride (2%) for improving fruit quality and shelf life.

scholarly journals Influence of Ascophyllum nodosum extract, homobrassinolide and triacontanol on fruit retention, yield and quality of mango

2021 ◽  
Vol 42 (4) ◽  
pp. 1085-1091
Author(s):  
A. Dash ◽  
◽  
D. Samant ◽  
D.K. Dash ◽  
S.N. Dash ◽  
...  
Keyword(s):  
Fruit Quality ◽  
Foliar Application ◽  
Block Design ◽  
Ascophyllum Nodosum ◽  
Quality Parameters ◽  
Fruit Weight ◽  
Fruit Growth ◽  
Yield And Quality ◽  
Randomized Block Design

Aim: To evaluate the efficacy of foliar application of Ascophyllum nodosum extract, homobrassinolide, and triacontanol for improving fruit retention, yield, and quality in mango. Methodology: The experiment was laid out in a randomized block design with 10 treatments, comprising Ascophyllum nodosum extract (1000, 3000, and 5000 ppm), homobrassinolide (0.1, 0.3, and 0.5 ppm), triacontanol (1, 3, and 5 ppm), and water as control. Treatments were foliar sprayed at panicle initiation, pea, and marble stages of fruit growth. Observations were recorded on flowering, fruiting, yield, and fruit quality parameters. Results: All the treatments of Ascophyllum nodosum extract and triacontanol exhibited significant improvement in fruit retention, fruit weight, yield, and fruit quality parameters over control. However, 3000 and 5000 ppm Ascophyllum nodosum extract treatments outperformed all the treatments of triacontanol. Plants sprayed with 5000 ppm Ascophyllum nodosum extract recorded the maximum value for fruit retention (48.15, 36.74, 29.48, and 25.76% at 3, 6, 9, and 12 weeks after pea stage, respectively), number of fruits (133.25 per tree), fruit weight (188.84 g per fruit), and yield (25.16 kg per tree), whereas the lowest values were recorded under control. With respect to fruit quality, 3000 ppm ANE produced the fruits with the highest TSS (19.62 °B), whereas the highest TSS/acid ratio was recorded with 5000 ppm ANE (62.29) treatment. Interpretation: In mango, foliar application of Ascophyllum nodosum extract (3000-5000 ppm) thrice at panicle initiation, pea, and marble stages of fruit growth is effective for reducing fruit drop and enhancing quantum and quality of produce.

scholarly journals Groundcover Materials Improve Quality and Storability of 'Aroma' Apples

HortScience ◽  
2005 ◽  
Vol 40 (5) ◽  
pp. 1416-1420 ◽  
Author(s):  
Ibrahim I. Tahir ◽  
Eva Johansson ◽  
Marie E. Olsson
Keyword(s):  
Starch Content ◽  
Quality Parameters ◽  
Fruit Weight ◽  
Chemical Treatments ◽  
Weed Growth ◽  
Yield And Quality ◽  
Fruit Maturity ◽  
Material Systems ◽  
Annual Weeds ◽  
Storage Disorders

To decrease the unfavorable effects of herbicides on human health and on the environment, new sustainable mulching methods have been developed. These methods aim to impede weed growth and also result in good yield and high fruit quality. The objective of the present study was to investigate the effects of the replacement of conventional methods (chemical treatments or mechanical) with different groundcover material systems (GCMSs) that use aluminum, bark and black polypropylene on 'Aroma' apple (Malus domestica) fruit maturity and quality, and fruit resistance to bruising and decay. The experiment was carried out from 1995 to 2001. Compared with conventional mulching methods, aluminum mulching was found to control annual weeds more effectively, to increase soil temperature, light reflection, yield, and fruit weight, to decrease bruise occurrence, to intensify and saturate the red coloration of apples, and to increase firmness and acid and sugar contents, resistance to storage disorders and decay after storage and shelf life. The other two used GCMSs, bark and black polypropylene also influenced many yield and quality parameters. However, less positive influences on the different parameters were found for bark compared with aluminum, and the use of black propylene was not favorable compared with the conventional mulching methods. Generally, decreased starch content at early picking dates was found for apples grown with GCMSs, indicating an earlier ripening for these apples compared with apples grown with a conventional mulching system. In summary, aluminum mulching was found to be the best alternative mulching method for production of 'Aroma' apples.

scholarly journals Effect of a nanotechnology-based foliar fertilizer on the yield and fruit quality in an apple orchard

2021 ◽  
Vol 27 ◽  
Author(s):  
Á. Csihon ◽  
I. Gonda ◽  
I. J. Holb
Keyword(s):  
Fruit Quality ◽  
Nutrient Management ◽  
Fruit Production ◽  
Quality Parameters ◽  
Fruit Weight ◽  
Apple Orchard ◽  
Leaf Length ◽  
Surface Color ◽  
Foliar Fertilizer ◽  
The Third

Nutrient management is a determining element of the technology in fruit production. Significance of foliar fertilization has been increased continuously over the last years, as it can improve directly the vegetative and generative performance of the trees. In this study we aimed to evaluate the effect of a nanotechnology-based foliar fertilizer (Bistep) with 1, 3, and 5 l/ha dosages on the yield and fruit quality parameters in an apple orchard during 2016 and 2018. According to our results, crop load increased with 29% in the third year of the experiment with the application of 5 l/ha Bistep treatment compared to the control treatments. Fruit weight was also improved in each year, as values of fruit weight in all treatments were higher than the control one (3.0-13.0% growth). Fruit surface color increased with 2-18% due to the foliar fertilizer. During the three years, leaf length was 9.5-9.9 mm on the control trees, as 9.8-10.4 mm was measured on the fertilized ones. In conclusion, yield and fruit quality can be improved in apple orchard using a nanotechnology-based foliar fertilizer.

scholarly journals Suitability of ‘Jonagold’ Apple Clones for Commercial Growing in Lithuania

2013 ◽  
Vol 67 (2) ◽  
pp. 215-218 ◽  
Author(s):  
Darius Kviklys ◽  
Nomeda Kviklienė ◽  
Nobērtas Ūselis
Keyword(s):  
Fruit Quality ◽  
Total Yield ◽  
Frost Damage ◽  
Quality Parameters ◽  
Fruit Weight ◽  
Winter Hardiness ◽  
Test Panel

Seven apple clones of cv. ‘Jonagold’: ‘Red Jonaprince’, ‘Jonagold Boerekamp’, ‘Jonagored Supra’, ‘Jonaveld’, ‘Jonagold DeCoster’, ‘Jonagold Novajo’ and ‘Jonabel’ were tested at the Institute of Horticulture in Babtai in 2003-2011. Significant differences among cv. ‘Jonagold’ clones were recorded in yield, fruit quality parameters and winter hardiness. The highest total yield was recorded for cvs. ‘Jonagold Boerekamp’ and ‘Red Jonaprince’, the lowest for cv. ‘Jonagold Novajo’. Average fruit weight of cv. ‘Jonagold Novajo’ was significantly lower. ‘Red Jonaprince’ fruits had the best colouration. ‘Jonagored Supra’ fruits had the best appearance according to the test panel. During winter 2009-2010, 30% of ‘Red Jonaprince’ trees suffered frost damage. No losses were recorded for ‘Jonagored Supra’. During the experiment tree losses due to frost and disease damages were 25-60% and depended on the clone.

Ammonium thiosulfate and 6-benzyladenine improve the crop load and fruit quality of 'Delicious' apples

2007 ◽  
Vol 47 (5) ◽  
pp. 635 ◽  
Author(s):  
S. A. Bound ◽  
S. J. Wilson
Keyword(s):  
Fruit Quality ◽  
Positive Relationship ◽  
Sugar Content ◽  
Fruit Size ◽  
Fruit Weight ◽  
Fruit Firmness ◽  
Single Application ◽  
Crop Load ◽  
Ammonium Thiosulfate

Four trials were conducted over 3 years to assess the effect of ammonium thiosulfate (ATS) as a blossom thinner of ‘Delicious’ apple trees. In addition to determining the optimal concentration of ATS and the effectiveness of multiple applications, the effect on fruit quality was assessed. A program using ATS at bloom and 6-benzyladenine (BA) applied postbloom was examined. Multiple applications of ATS reduced crop load more than a single application. A concentration of 1.0% (v/v, 5800 mg/L) applied twice during the flowering period is recommended, with the first application at 20% bloom and the second at 80% bloom. Fruit firmness and sugar content were increased by ATS, and a positive relationship between fruit weight and sugar content and between fruit weight and firmness was demonstrated. ATS can also be effectively combined in a program with BA with the added benefits of increases in fruit size, firmness and sugar content; however, caution is advised to prevent over-thinning.

scholarly journals FRUIT PHYSICO-CHEMICAL QUALITY PARAMETERS OF NEW INTRODUCED APPLE CULTIVARS

2021 ◽  
Vol 37 (37) ◽  
pp. 39-44
Author(s):  
Madalina Militaru ◽  
◽  
Victor Bucarciuc ◽  
Madalina Butac ◽  
Eugenia Maresi ◽  
...  
Keyword(s):  
Fruit Quality ◽  
Quality Parameters ◽  
Apple Fruit ◽  
Fruit Weight ◽  
Soluble Solids ◽  
Total Soluble Solids ◽  
Physico Chemical ◽  
Resistant Varieties ◽  
Fruit Samples ◽  
Apple Cultivars

The apple fruit is the second most frequently consumed, after bananas and some quality characteristics like size, gloss, color, and aroma influenced directly the flesh consumption. In this study, the external (weight, size, skin colour) and internal (firmness, total soluble solids, acidity, pH) fruit quality attributes were measured experimentally before the storage, using well defined techniques. 'Corelita', 'Coreal', 'Corealor', 'Coredova', 'Corejuno', 'Coretard', 'Coreagat', 'Coreor' and 'Coreprim' cultivars were registered, in the last 15 years, by Practical Scientific Institute of Horticulture and Food Technologies Chișinău, Republic of Moldova, as scab resistant varieties. The orchard trial was established at the Research Institute for Fruit Growing Pitesti, Romania in the spring 2014 on MM106 rootstock, at the spacing of 3.5 x 2 m and fruit samples were analyzed in 2019, 2020 and 2021 seasons. All studied cultivars were harvested before 'Florina' cv., used as control. Fruit weight was quite variable among genotypes, between 115.15 g at 'Coreal' cv. and 212.41 g at 'Corejuno', and most of the cultivars had smaller fruits than 'Florina' cv. Firmness and total soluble solids varied from 70.5 to 82.61 N and 12.77 to 16.77%Brix. The Hunter color values L, a, b, were found to be in the range of 46.12 to 56.76, - 6.46 to 14, 13.75 to 23.72, respectively. The data about the external and internal fruit quality of new Moldavian scab resistant apple cultivars are useful for growers, in order to introduce in the new orchards only cultivars with high quality fruits.

scholarly journals Effect of foliar spraying with algae suspension on leaf and fruit quality parameters of apple varieties

2012 ◽  
Vol 18 (1) ◽  
Author(s):  
P. T. Nagy ◽  
A. Ambrus ◽  
J. Nyéki ◽  
M. Soltész ◽  
Z. Szabó
Keyword(s):  
Chlorophyll Content ◽  
Fruit Quality ◽  
Shape Index ◽  
Quality Parameters ◽  
Fruit Weight ◽  
Foliar Nutrition ◽  
Leaf Chlorophyll Content ◽  
Titratable Acid ◽  
Leaf Chlorophyll ◽  
Leaf N Content

Foliar nutrition experiment was made to investigate the effect of algae products on fruit quality of apples (Malus domestica Borkh.). The study was conducted in 2011 at Siófok inWest-Hungary on cv. ‘Jonagored’ and ‘Idared’grafted on M9 rootstock. In our trial leaf diagnostic and fruit quality measurements were made to study the effectiveness of applied products. Relative leaf chlorophyll content was determined by a portable chlorophyll meter. Fruit weight and shape index were measured. Fruit inner qualifying parameters like titratable acid content and Brix value were also determined. It can be stated that the used products had traceable effect on investigated fruit parameters. Although, leaf N content was not effected by treatments significantly, relative leaf chlorophyll content significantly increased by both treatments. Used products significantly increased the fruit weight and shape index. Applied treatments significantly decreased the pH of pulp. Treatments increased the acid contents (fumaric, citric, malic) of apples and decreased the amount of monosaccharides. It means that the applied treatments pushed out the ratio of acid/sugar.

Sign in / Sign up

Export Citation Format

Share Document