Deblossoming Monsoon Crop of Guava (Psidium guajava L.) cv. Surahi Affects Yield and Quality of Winter Crop

2019 ◽  
pp. 109-112
Author(s):  
Muhammad Azhar Bashir ◽  
Ammara Noreen ◽  
Muhammad Ikhlaq ◽  
Kashif Shabir ◽  
Faheem Altaf ◽  
...  
Keyword(s):  
Ascorbic Acid Content ◽  
Fruit Fly ◽  
Psidium Guajava ◽  
Soluble Solids ◽  
Naphthalene Acetic Acid ◽  
Research Station ◽  
Fruit Drop ◽  
Yield And Quality ◽  
Fruit Setting ◽  
Winter Crop

Monsoon crop of guava is hit by fruit fly during July-August that results into huge loss to the producers. Spray of urea and Naphthalene acetic acid (NAA) is used to drop flowers and fruits of monsoon crop to get higher yield of winter crop. This study was carried out at Fruit Orchard of Horticultural Research Station, Bahawalpur during 2015-2017 to determine the optimum concentration of selected chemicals to drop flowers and immature fruits of monsoon crop. Plants with distilled water spray were treated as control (T1). Other treatments included urea @ 5% and 10% (T2 & T3), NAA @ 0.05 and 0.1% (T4 & T5) as 1st spray and repeated the same spray after fortnight, combination of urea (5%) as 1st spray followed by NAA (0.05%) as 2nd spray (T6) or urea (10%) 1st spray followed by NAA (0.1%) as 2nd spray (T7). Consolidated means of parameters over two years’ study indicated that the highest fruit yield (68.6 kg/plant), the maximum weight per fruit (168.3 g), number of fruit/plant (375), pulp content (55.5%), pulp thickness (1.05 cm), total soluble solids (14.3 °Brix), ascorbic acid content (176.7 mg / 100 g pulp) and total sugars (7.6%) were obtained as a result of highest flower drop (96.7%) and fruit drop (76.9%) with lowest fruit set (2.9%) from non-target monsoon fruiting in response to 0.1% NAA (T5) sprayed twice at fortnight interval, proceeded after the application of 0.05% NAA two spray fortnightly (T4). The plants under control remained at bottom with respect to parameters i.e. flower and fruit drop, at top with highest fruit setting in monsoon crop that led to the lowest yield of winter crop.

scholarly journals Effect of bending of shoots on flowering, yield and quality of guava cv. Khaja

2017 ◽  
Vol 9 (3) ◽  
pp. 1365-1368
Author(s):  
P. Nandi ◽  
D. Roy ◽  
B. Ghosh ◽  
S. Kundu
Keyword(s):  
Fruit Set ◽  
Block Design ◽  
Ascorbic Acid Content ◽  
Fruit Weight ◽  
Total Sugar ◽  
Soluble Solids ◽  
Research Station ◽  
Flower Initiation ◽  
Yield And Quality

The study of the effect of bending of shoots in different months in guava cv. Khaja was carried out at Horticulture Research Station, Mondouri of Bidhan Chandra Krishi Viswavidyalaya to find out suitable bending time for improving flowering, yield and quality of guava. The experiment consists of seven treatments with three replications in a randomised block design. The different treatments were bending in October (T1), November (T2), March (T3), April (T4), May (T5), June (T6) and untreated control (T7). Bending in June (T6) resulted early emergency of new shootlet (15.0 days), flower initiation (40.33 days) and fruit set (48.33 days) from the date of bending as well as the same treatment showed maximum fruit weight (197.67 gm), fruit length (8.00 cm), fruit diameter (7.16 cm) and pulp thickness (2.20 cm). Higher fruit quality in terms of total soluble solids (11.04 0brix), total sugar (7.0 %) and ascorbic acid content (197.96 mg/100g pulp) was noted when bending was done in May (T5) and June (T6). Bending in the month of October (T1) resulted in maximum C: N ratio of leaf with maximum flowering shootlets in a branch and yield (63.67 kg/plant). So, time of bending may be standardized in the month of October or June for higher profit.

scholarly journals Effect of Pre Harvest Application of Some Growth Regulators on the Yield and Quality Characteristics of Grape (Vitis vinifera L.)

1970 ◽  
Vol 42 (1) ◽  
pp. 59-66
Author(s):  
S Begum ◽  
M Ibrahim ◽  
A Samad ◽  
MR Khan ◽  
S Khaleda ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Growth Regulators ◽  
Quality Characteristics ◽  
Soluble Solids ◽  
Naphthalene Acetic Acid ◽  
Relative Efficacy ◽  
Titrable Acidity ◽  
Yield And Quality ◽  
Dichlorophenoxy Acetic Acid ◽  
Indole 3 Acetic Acid

Present study was undertaken to investigate the relative efficacy of four growth regulators, viz., α-naphthalene acetic acid (NAA), indole-3-acetic acid (IAA), gibberellic acid (GA) and 2,4-Dichlorophenoxy acetic acid (2,4-D) at various concentrations (ppm) on the yield and some other quality characteristics of grape (Zakkao cultivar) at the experimental grape research vine of BCSIR Laboratories, Rajshahi during the period January, 2003 to July, 2004. Yield was found to be increased (33.11 %) by spraying with 05 ppm of 2,4-D as compared to control and other growth regulator treatments. Fruits of treated plants showed increased total soluble solids (20.28 %) and vitamin (23.18 %) than that of untreated one. The titrable acidity (T. A) of fruits (33.01 %) of the treated plants was reduced significantly as compared to control. Bangladesh J. Sci. Ind. Res. 42(1), 59-66, 2007

scholarly journals Effect of Nitrobenzene on Flowering, Fruiting and Quality Parameters of Apple cv. Royal Delicious under Cold Dry Temperate Region of Himachal Pradesh

2020 ◽  
Vol 40 (01) ◽  
Author(s):  
Arun Kumar
Keyword(s):  
Fruit Set ◽  
Moisture Stress ◽  
Fruit Production ◽  
Quality Parameters ◽  
Himachal Pradesh ◽  
Fruit Drop ◽  
Yield And Quality ◽  
Fruit Setting ◽  
Three Stages ◽  
Adverse Environmental Conditions

Apple accounts for more than 74 per cent of total fruit production in Himachal Pradesh. Poor fruit-set as well as heavy fruit drop due to improper pollination, moisture stress and adverse environmental conditions during flowering are the major barriers in dry temperate zone fruit production of apple. Apple tree blooms abundantly but only very few of them matures into fruit and it is the need of the hour to induce better fruiting with chemicals that ultimately augment the productivity. With such an intent the experiment was carried out. Nitrobenzene 20 % EW applied as a foliar treatment at three stages i.e. pink bud, petal fall and fruit setting stage. The highest number of fruits and flowers/plant was observed in T4 (3ml/liter) and T3 (2 ml/liter) of Nitrobenzene 20 % applied treatments. On the other hand the lowest number of flowers as well as fruits were recorded from T2 (1 ml/liter) and T1 (control). Among different treatments tested, 20% nitrobenzene applied at 3 ml/litre showed superior results in contrast to other nitrobenzene levels with enhancing flowering, fruit set, yield and quality.

scholarly journals Physiological and physico-chemical changes in 1-methylcyclopropene-treated guava (Psidium guajava L. cv. Queso de Bola) fruit stored at ambient condition

Food Research ◽  
2020 ◽  
Vol 4 (6) ◽  
pp. 2207-2216
Author(s):  
J.S. Zuniega ◽  
E.B. Esguerra
Keyword(s):  
Disease Incidence ◽  
Ascorbic Acid Content ◽  
Titratable Acidity ◽  
Psidium Guajava ◽  
Ambient Condition ◽  
Soluble Solids ◽  
Total Phenolic ◽  
Guava Fruit ◽  
Peel Color ◽  
Physico Chemical

The marketability of guava fruit is influenced by its quality attributes desired by consumers such as crispiness and crunchiness, green peel color, absence of defects, and better taste. ‘Queso de Bola’ guava fruits were treated with 600 nL L-1 of 1- methylcyclopropane (1-MCP) for 12 hrs then stored at ambient condition (29±2°C, 60- 80% RH). Reduced respiration rate with 1-MCP treatment was observed only starting on the 5th day of storage. Ethylene production, however, was not suppressed. The continuous decline in polygalacturonase activity with 1-MCP treatment coincided with firmness retention of the fruit until the 15th day. Higher firmness of 1-MCP-treated fruits than control fruits was further supported by higher sensory scores for crispiness and crunchiness particularly towards the later part of storage. 1-MCP treatment did not prevent peel browning as shown by similar polyphenol oxidase activity and pattern of change in total phenolic content. Total soluble solids, titratable acidity, and pH were not affected by 1-MCP treatment and did not markedly change during storage. Ascorbic acid content decreased in both treatments until day 6 followed by a slight increase with 1-MCP treatment exhibiting higher levels than the control. In general, 1-MCP treatment prolonged the marketability of guava by 3-4 days which was attributed to the maintenance of firmness, retention of green peel color, and reduced disease incidence.

Effect of different pruning levels on improving fruit yield and quality of Indian jujube (Ziziphus mauritiana Lamk.) Cultivars

2020 ◽  
pp. 75-82
Author(s):  
Muhammad Azhar Bashir ◽  
Muhammad Ikhlaq ◽  
Ammara Noreen ◽  
Kashif Shabir ◽  
Naheed Akhtar ◽  
...  
Keyword(s):  
Block Design ◽  
Soluble Solids ◽  
Ziziphus Mauritiana ◽  
Fruit Drop ◽  
Yield And Quality ◽  
Drought Tolerant ◽  
Two Factors ◽  
Tropical Climates ◽  
Indian Jujube

Indian jujube (Ziziphus mauritiana Lamk.) is a drought tolerant fruit crop and well adapted to sub-tropical to tropical climates. Seasonal pruning in jujube is essential to sustain the plants as productive with quality fruits because flowers and fruits are borne on young shoots of current season’s growth. This experiment was initiated and accomplished during 2016-18 to assess appropriate extent of pruning in various cultivars of Indian jujube with regard to productivity and fruit quality. Four cultivars of jujube i.e., Dehli Sufaid, Pak White, Umran and Alu Bukhara were subjected to four pruning levels i.e. no pruning, 25%, 50% and 75% pruning by removing unproductive, over-crowded secondary and tertiary branches leaving 3/4 (light), 1/2 (medium) and 1/4 (severe pruning) portion of branch intact with main limb, respectively. Experiment was laid out in randomized complete block design with three replications and statistically analysed in 2-factors factorial way. Pak White initiated new growth earlier (39 days), produced maximum branches per plant (77), shoots (15), panicles (63) and fruits (90) per branch, heavier (38 g) and bulky fruits (44 cm3), with minimum fruit drop (13%), higher yield (184 kg) per plant and fruits carrying the maximum pulp ratio (90%), total soluble solids (16 °Brix), vitamin C content (121 mg /100 g pulp) and total sugars (5.7%). Fifty percent pruning level proved more judicious in all jujube cultivars. Pak White performed the best when subjected to 50% pruning level for all the parameters under study as calculated by interaction between two factors.

scholarly journals Yield and quality of head lettuce after 24-epibrassinolide application under optimal and reduced irrigation

2012 ◽  
Vol 60 (3) ◽  
pp. 93-100 ◽  
Author(s):  
Martin Koudela ◽  
František Hnilička ◽  
Jaroslava Martinková ◽  
Lenka Svozilová ◽  
Jitka Doležalová
Keyword(s):  
Ascorbic Acid ◽  
Acid Content ◽  
Ascorbic Acid Content ◽  
Nitrate Content ◽  
Research Station ◽  
Marketable Yield ◽  
Yield And Quality ◽  
Head Weight ◽  
Moisture Conditions

The aim of this work was evaluation of 24-epibrassinolide influence on yield and quality of head lettuce in optimal and reduced moisture conditions and work out recommendation of 24-brassinosteroids use for lettuce in growers praxis. Field trials were carried out on land belonging to the Demonstration and Research Station of CULS in Prague – Troja in 2009 and 2011. Planting on 27. 8. 2009 and 20. 8. 2011 was done at planting space 0.25 × 0.30 m, each variant in four repetition (single plot 4,5 m2). Seedlings of head lettuce (cultivar Santoro – Rijk Zwaan) were used. Irrigation was carried out by microspraying, and was based on current values of efficient water capacity (EWC); the critical value of the EWC was 80% for optimally irrigated fields (irrigation O), and 50% for variants with reduced levels of irrigation (irrigation S). The total amount of irrigation water during vegetation were as follows: the variant with optimal levels of irrigation (O) had 131 mm in 2009 and 123 mm in 2011; the variant with reduced levels of irrigation (S): 58 mm in 2009 and 63 mm in 2011 Three variants were in both (O and S) conditions: A – no application of 24-epibrassinolide, B – 1 × 24-epibrassinolide application immediately after planting, and C – application of 24-epibrassinolide 2 x (immediately after planting and then after 14 days after 1st application). Concentration of 24-epibrassinolide was 10−6. Following parameters of head lettuce were set after harvesting (10.–12. 10. 2009 and 14.–15. 10. 2011): weight of single heads, marketable heads, marketable yield (in pcs/ha and t/ha) and ascorbic acid and nitrate contents. Influence of 24-epibrassinolide on single lettuce head weight was not significant, decrease of head weight was evident after 24-epibrassinolide application in some variants. Significant increase of marketable heads number and their percentages were noted after 24-epibrassinolide application in optimal moisture conditions – in variant B of 12 261 heads/ha (11.1 %) and in variant C of 16 279 heads/ha (14.7 %) compared with non treated variant A. This trend was not visible in reduced moisture conditions. Increase (nonsignificant) of total marketable yield (in t/ha) was noted after 24-epibrassinolide application. No significant differences were founded among the ascorbic acid contents in each irrigation variant. A higher ascorbic acid content (by approximately 11.9 % in variant C compared with control A) is evident after application of 24-epibrassinolide in the variant with lower levels of irrigation – S. Contrarily, decrease ascorbic acid content is indicated in the optimal levels of irrigation – O (by approximately 16.8 % in variant C compared with control A). The influence of 24-epibrassinolide application on the nitrate content was not significant, but the trend of nitrates decrease in optimal irrigation conditions is evident.

scholarly journals Impact of liquid and carrier based biofertilizers on fruit and quality traits in tomato (Solanum lycopersicum L.)

2021 ◽  
Vol 17 (2) ◽  
pp. 220-227
Author(s):  
K. Lakshmikala ◽  
B. Ramesh Babu ◽  
M. Ravindra Babu ◽  
P. Rama Devi
Keyword(s):  
Solanum Lycopersicum ◽  
Block Design ◽  
Growth Yield ◽  
Ascorbic Acid Content ◽  
Fruit Weight ◽  
Research Station ◽  
Solanum Lycopersicum L ◽  
Yield And Quality ◽  
Randomized Block Design ◽  
Two Factors

The present investigation “Influence of liquid and carrier based biofertilizers on growth, yield and quality of tomato (Solanum lycopersicum L.)”was laid out in randomized block design with two factors and three levels comprising of nine treatment combinations in three replications at Horticultural Research Station, Dr. Y.S.R. Horticultural University, Venkataramannagudem, West Godavari during Rabi, 2018. The application of 80 % recommended dose of fertilizers along with liquid biofertilizers resulted in significant higher differences in number of fruits per cluster (4.90), number of fruits per plant (60.0), fruit set % (98.34), fruit length (5.83 cm), fruit width (5.45 cm), average fruit weight (96.96 g), fruit yield per plant (7.27 kg), TSS (4.670 Brix), ascorbic acid content (16.53 mg/100 g), lycopene content (31.72 mg/100g) and titrable acidity (0.53 %) when compared to other treatment combinations.

scholarly journals Hybrid vigour for yield and quality traits in tomato (Lycopersicon esculentum L.)

2015 ◽  
Vol 7 (2) ◽  
pp. 774-779
Author(s):  
Chandanshive Aniket Vilas ◽  
M. K. Rana ◽  
Naval Kishor Kamboj ◽  
Neha Yadav
Keyword(s):  
Ascorbic Acid ◽  
Total Yield ◽  
Ascorbic Acid Content ◽  
Soluble Solids ◽  
F1 Hybrids ◽  
Hybrid Vigour ◽  
Quality Traits ◽  
Yield And Quality ◽  
The Cross ◽  
Positive Heterosis

An experiment on heterosis for yield and other component characters of 50 F1 hybrids of tomato derived from the crosses between 10 lines and 5 testers through line x tester technique was conducted at Research Farm of the Department of Vegetable Science, CCS Haryana Agricultural University, Hisar during 2012-13 and 2013-14. The analysis of variance indicated significantly higher amount of differences among treatments for all the characters studied, suggesting the presence of genetic variation among the studied genotypes. In this study, among crosses, the cross Punjab Varkha Bahar-2 x Hisar Lalit (0.400), EC 620383 x Palam Pink (0.383) and BBWR-10-3-18 x Hisar Lalit (0.382) showed higher early fruit yield per plant (kg) as compared to standard checks. The cross EC 620380 x Punjab Chhuhara (0.133 kg) produced the minimum early yield and the cross EC 620391 x Punjab Chhuhara (0.886 kg) the maximum total yield per plant, manifesting higher heterosis for yield per plant. The cross EC 620533 x Arka Meghali exhibited positive desirable heterosis over best parent for ascorbic acid content (30.58%) and the cross EC 620391 x Arka Vikas (54.25%) for total soluble solids . The cross EC 620380 x Arka Vikas showed the highest negative heterosis over best parent for acidity (-17.12%) and the cross Punjab Varkha Bahar-2 x Hisar Lalit (33.78%) exhibited the significantly highest positive heterosis over best parent for acidity.

Guava (Psidium guajava L.) Fruit Coating with Gum – Arabic for Quality and Fruit Fly Control

1970 ◽  
pp. 01-04
Author(s):  
Esameldin B. M. Kabbashi, Ghada H. Abdelrahman and Nawal A. Abdlerahman
Keyword(s):  
Shelf Life ◽  
Gum Arabic ◽  
Fruit Fly ◽  
Psidium Guajava ◽  
Postharvest Quality ◽  
Guava Fruit ◽  
Fruit Shelf Life ◽  
Fly Control ◽  
And Control ◽  
Subtropical Fruit

Guava (Psidium guajava L.) is a lovely tropical and subtropical fruit that originates in Mexico, Central America, and then taken to other distant and near parts around the world. In Sudan this popular fruit is produced in orchards and household and is so profitable but yet attacked by a lot of fruit fly species of the Genera Ceratitis and Bactrocera and the result is a loss of more than 70%. This research aimed at evaluating the effect of Gum Arabic coating (GAC) in extending the shelf life of guava fruit and disinfesting it from these notorious pests. Guava fruits from Kadaro orchards, Khartoum North, were tested using seven concentrations of Gum Arabic solutions. The results reflect that 1: 4 (25%) and 1: 8 (12.5%) (GA: water) concentrations attained 56 and 40% disinfestation, respectively whereas the other lower concentrations effected corresponding results in a range from 20 – 08%. The reduction in maggots per test fruit reached upto 188% as compared to the control.  The highest concentrations (1: 4 & 1: 8) effected a sustainability of 52% in fruit firmness (FF) with an average of medium (3) FF compared to soft FF (4) in the control. The corresponding results in other lower concentrations (1: 16; 1: 32; 1: 64; 1: 72 & 1: 96) were 36, 24, 24, 20 and 16%, respectively. In addition to an average FF of 4 (soft) for all these concentrations and 5 (very soft) for all the corresponding controls. Nevertheless, the sustainability of fruit color (FC) effected by the test concentrations was 52, 44, 24, 22, 24, 20, and 24%, respectively. Regarding these results, the two highest test concentrations effected a sizeable disinfestation and control of fruit flies and a good extension of shelf life of guava in Khartoum State. These findings support using this treatment as an effective IPM tool to extend guava fruit shelf life and upgrading its postharvest quality.

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