Strobilurin and boscalid in the quality of net melon fruits

Until recently, fungicides were used exclusively for disease control; however observations of physiological effects brought a new concept to the use of these products. Strobilurins have positive physiological effects on crop yield, due to the increase of liquid photosynthesis and better hormonal balance. However, boscalid complements the action of these fungicides, applied alternately or together. The aim of this study was to evaluate the effect of strobilurins (azoxystrobin and pyraclostrobin), boscalid and the mixture of these on the physical-chemical quality of net melon fruits (Cucumis melo var. Reticulatus). The experiment was conducted in the municipality of São Manuel (SP), using the hybrid of Cantaloupe M2-308 net melon, the experimental design was in randomized blocks with five replicates. The treatments used were: T1 - control; T2 - azoxystrobin 60g ha-1 of active principle (a.p.); T3 - boscalid 75g ha-1 of the a.p.; T4 - pyraclostrobin 50g ha-1 of the a.p.; T5 - boscalid (37,5g ha-1) of the a.p. + pyraclostrobin (25g ha-1) of the a.p. The first application of the treatments was carried out at fourteen days after the transplanting of the seedlings and the others at seven day intervals, totaling eight applications throughout the cycle. Two fruits of each plot were collected, which were identified for analysis in the laboratory. The following characteristics were evaluated: fresh fruit mass; mesocarp thickness, pulp texture, peel trajectory, pH, titratable acidity, soluble solids and the ratio. The results were submitted to analysis of variance and the averages compared by the Tukey test at 5% probability using the SISVAR program. The fruits of the plants treated with boscalid 75g ha-1 were the ones that showed higher concentration of soluble solids and low titratable acidity, resulting in a better ratio. Despite the lower value, the fruits of the plants treated with pyraclostrobin 50g ha-1 showed a high ratio value, besides presenting higher value for pulp texture. The mixture of boscalid (37.5g ha-1) + pyraclostrobin (25g ha-1) also showed high values of soluble solids which resulted in a good “ratio” value.

Download Full-text

Fruit quality of ‘Eva’ e ‘Princesa’ apples grown under nitrogen fertigation in semiarid climate

Revista Brasileira de Engenharia Agrícola e Ambiental ◽

10.1590/1807-1929/agriambi.v19n10p967-972 ◽

2015 ◽

Vol 19 (10) ◽

pp. 967-972 ◽

Cited By ~ 1

Author(s):

João M. de S. Miranda ◽

Ítalo H. L. Cavalcante ◽

Inez V. de M. Oliveira ◽

Paulo R. C. Lopes ◽

Joston S. de Assis

Keyword(s):

Fruit Quality ◽

Skin Color ◽

Titratable Acidity ◽

Soluble Solids ◽

Economic Viability ◽

Fruit Firmness ◽

Fruit Characteristics ◽

Apple Cultivars ◽

Fruit Mass

ABSTRACTThe production of high quality fruits is a necessary factor for the adaptation and production of plant species with economic viability. Thus, an experiment was conducted from July 2012 to January 2013 to evaluate the fruit quality of the ‘Eva’ and ‘Princesa’ apple cultivars as a function of nitrogen fertilization in Petrolina, PE, Brazil. The experimental design consisted of randomized blocks, with treatments distributed in a factorial arrangement 2 x 4, corresponding to apple cultivars (Eva and Princesa) and nitrogen doses (40; 80; 120 and 160 kg of N ha-1), with four replications and three plants in each plot. The fruit characteristics, such as fruit mass, skin color (luminosity, chromaticity, and colour angle), size (width and length), pulp firmness, titratable acidity (TA), soluble solids (SS) and the SS/TA ratio, were recorded. Nitrogen doses do not affect fruit quality of studied apple cultivars. The fruit quality attributes are different between apple cultivars: fruit firmness, SS/TA ratio, fruit mass and fruit diameter are superior for Princesa cultivar, while the fruit length for Eva cultivar is superior.

Download Full-text

Phenology, production and quality of blueberry produced in humid subtropical climate

Revista Brasileira de Fruticultura ◽

10.1590/0100-29452018520 ◽

2018 ◽

Vol 40 (3) ◽

Author(s):

José Gilberto Sousa Medeiros ◽

Luiz Antonio Biasi ◽

Claudine Maria de Bona ◽

Francine Lorena Cuquel

Keyword(s):

Fruit Set ◽

Titratable Acidity ◽

Soluble Solids ◽

Subtropical Climate ◽

Blue Color ◽

Productive Performance ◽

Climate Conditions ◽

Mass Size ◽

Fruit Mass

Abstract Studies on adaptation to the cultivation site are necessary for the recommendation of new cultivars. The aim of this study was to evaluate the phenological development, productivity and fruit quality of eight blueberry cultivars from the rabbiteye group (Aliceblue, Bluebelle, Bluegem, Briteblue, Climax, Delite, Powderblue and Woodard) and two from the highbush group (Georgiagem and O’Neal) under humid subtropical conditions in the 2012/2013, 2013/2014 and 2014/2015 cycles. Beginning and end of flowering, beginning and end of harvesting, fruit set, production, mass, diameter, pH, content of soluble solids, titratable acidity, ratio and coloring were evaluated. The evaluated cultivars presented flowering in the period from July to September, concentrating harvest in the months of November and December. The highest fruit set was observed in Delite, Climax, Briteblue and Powderblue cultivars. There were differences among cultivars regarding fruit mass, size, pH, content of soluble solids and acidity. The results showed that the cultivars exhibited blue color with few variations over the evaluation years. Cultivars with the best productive performance under humid subtropical climate conditions are Bluegem, Delite, Climax and Powderblue.

Download Full-text

Refrigerated storage of fresh-cut marolo (Annona crassiflora mart.)

REVISTA BRASILEIRA DE AGROTECNOLOGIA ◽

10.18378/rebagro.v10i2.8047 ◽

2020 ◽

Vol 10 (2) ◽

pp. 44-54

Author(s):

Flávia Della Lucia ◽

Eric Batista Ferreira ◽

Sandra Maria Oliveira Morais Veiga ◽

Luciana Azevedo ◽

Marcela Aparecida Miranda Moreira ◽

...

Keyword(s):

Storage Time ◽

Titratable Acidity ◽

Soluble Solids ◽

Physical Chemical ◽

Significant Difference ◽

Thermotolerant Coliforms ◽

Fresh Cut ◽

Annona Crassiflora ◽

Storage Temperatures

Marolo is a fruit typical of the Brazilian Savanna that is highly appreciated for its exotic flavour, nutritional value and sensory attributes. This study aimed to assess the quality of fresh-cut marolo by checking for possible changes in physical, chemical, microbiological and sensorial characteristics during cold storage (12 days at 0°C, 5°C and 10°C). Firmness varied based on storage time; the fruit softened on the 8th day and then increased in hardness until the end of the study. The lowest storage temperatures reduced the darkening rate of this product. No variations in the levels of soluble solids (12.7 to 14.6°B) or total phenolics (741.06 to 1295.21 mg. GAE.100g-1) were observed. Fruits stored at 10 °C showed an increase in titratable acidity after the 5th day and an increase in pH on the 10th and 12th days. Increases in the soluble pectin (156 to 265.73 mg.100g-1) and total pectins (>1.000 mg.100g-1) were noted. No significant difference was observed in the count of the total and thermotolerant coliforms, and the growth of filamentous fungi and yeasts decreased after storage at 0°C and 5°C after the 5th day. Storage at 5 °C for 5 days was found to be the most efficient set of conditions for maintaining the physical, chemical, microbiological and sensory characteristics of marolo.

Download Full-text

Post harvest evaluation of physical-chemical parameters of mechanically damaged Tahiti acid limes

Revista Brasileira de Pesquisa em Alimentos ◽

10.14685/rebrapa.v1i2.20 ◽

2010 ◽

Vol 1 (2) ◽

pp. 79

Author(s):

Michel Shoiti Tamura ◽

Roselene Ferreira Oliveira ◽

Simone Correia Molina ◽

Edmar Clemente

Keyword(s):

Titratable Acidity ◽

Soluble Solids ◽

Chemical Parameters ◽

Post Harvest ◽

Physical Chemical ◽

Randomized Design ◽

Significant Difference ◽

Completely Randomized Design ◽

Solids Content

From harvest to consumption, fruit and vegetables suffer a series of mechanical damages which, depending on their sensitiveness, may cause damages that put their final quality at risk. This work had as its objective evaluate the post harvest quality of mechanically damaged ‘Tahity’ acid limes. The experiment was carried out in a completely randomized design, with 3 repetitions and 7 fruits per treatment, mechanical damages were then evaluated by cutting and impacting in comparison to healthy fruits (control), and maintained for periods of 0, 3. 6, 9, 12, 15 and 18 days, thus obtaining a 3 x 7 factorial experiment. Analyses were made throughout the 18 days, so as to determine the total soluble solids content (expressed in °Brix); titratable acidity (in g of citric acid. 100mL-1); ratio (relationsoluble solids and titratable acidity); vitamin C (expressed in mg of ascorbic acid 100mL-1) and pH. The results obtained showed that there was significant difference in the chemical parameters evaluated, mainly those submitted to damaging treatment. DOI: http://dx.doi.org/10.14685/rebrapa.v1i2.20

Download Full-text

Productivity and quality of irrigated organic yellow passion fruits in deep planting in Southeastern Amazon

Revista Brasileira de Fruticultura ◽

10.1590/0100-29452020584 ◽

2020 ◽

Vol 42 (4) ◽

Author(s):

Wagner de Moura Francisco ◽

Sebastião Elviro de Araújo Neto ◽

Thays Lemos Uchôa ◽

Luís Gustavo de Souza e Souza ◽

Nilciléia Mendes da Silva

Keyword(s):

Block Design ◽

Titratable Acidity ◽

Soluble Solids ◽

Organic System ◽

Randomized Complete Block Design ◽

Total Titratable Acidity ◽

Total Productivity ◽

Fruit Mass ◽

Yellow Passion Fruit

Abstract The aim of this work was to evaluate the effect of irrigation and deep planting of tall yellow passion fruit seedlings in the organic system on fruit quality and productivity. A randomized complete block design with 2x4 subdivided plots, with 8 treatments and 4 blocks was used, with irrigated and rainfed systems being plots and 4 planting depths (0.20 m, 0.40 m, 0.60 m and 0.80 m) subplots. Seedlings aged 90 days and 2 m in height were used. Before planting, all stem leaves were removed from seedlings to be buried and to IBA at concentration of 4,000 mg kg-1 was applied. The number of fruits per plant, average fruit mass and total productivity and of 1st and 2nd crops, as well as total soluble solids (TSS), total titratable acidity (TTA), ratio (TSS/TTA), commercial and equatorial diameter classification were estimated. Irrigated planting at depths of 0.20 m and 0.40 m was more productive in the first crop, but there was no difference in the total productivity and in the second crop. Neither irrigation nor plant depth altered the chemical quality of fruits and commercial classification.

Download Full-text

Quality of Italian tomatoes grown with different forms of calcium application

Research Society and Development ◽

10.33448/rsd-v9i12.10837 ◽

2020 ◽

Vol 9 (12) ◽

pp. e10191210837

Author(s):

Isa Gabriela Vieira de Andrade ◽

Gilmário Noberto de Souza ◽

Eduardo Santana Aires ◽

Ítala Laiane Silva Gomes ◽

Ruy de Carvalho Rocha ◽

...

Keyword(s):

Block Design ◽

Titratable Acidity ◽

Soluble Solids ◽

Fruit Firmness ◽

Post Harvest ◽

Randomized Block Design ◽

Randomized Design ◽

Tree Fruits ◽

Fruit Mass

Tomato is one of the most consumed vegetables in the world. This work aimed to evaluate post-harvest quality of Italian Saladete tomatoes grown in a protected environment, with different ways of calcium application, in the Middle São Francisco Valley. Consisting of five Italian tomato hybrids (Anjico, Gabrielle, Liberty, Ty 2006 and Shanty), and three different ways of calcium application (T0 without application of calcium; T1 application of calcium in the opening flower, and T2 weekly application of calcium in the fruit). Poductivity, average fruit mass, incidence of apical rot, fruit firmness, soluble solids (SS), titratable acidity (AT), and pH, were analized. The experimental design used was a completely randomized block design in a factorial scheme (five cultivars x three ways of calcium application), with three repetition and using two central plants as useful plot for analysis, except for fruit firmness that was carried out in a completely randomized design, using tree fruits per analysis. According to the results obtained, hybrids of Italian saladete tomatoes behaved in a satisfactory manner, therefore it is recommended to cultivate hybrids of Italian saladete tomatoes in the Middle São Francisco Valley, mainly hybrid Anjico. Calcium application way did not interfere with post-harvest attributes.

Download Full-text

Fruit quality of wild, sweet and yellow passion fruit genotypes in Distrito Federal, Brazil

Bioscience Journal ◽

10.14393/bj-v37n0a2021-48203 ◽

2021 ◽

Vol 37 ◽

pp. e37064

Author(s):

Daiane da Silva Nóbrega ◽

Ana Clara Nunes Mendes ◽

José Ricardo Peixoto ◽

Michelle Souza Vilela ◽

Fábio Gelape Faleiro ◽

...

Keyword(s):

Fruit Quality ◽

Titratable Acidity ◽

Passion Fruit ◽

Soluble Solids ◽

Width Ratio ◽

Total Soluble Solids ◽

Length Width ◽

Fruit Mass ◽

Yellow Passion Fruit

Despite the importance of passion fruit for the Brazilian fruit market, there are still many agronomic and fruit quality problems to be solved, in order to increase this crop performance. The objective of this study was to evaluate the quality of twelve genotypes of wild, sweet and yellow passion fruit, aiming to identify promising materials considering fruit quality, in Federal District, Brazil. An experiment was carried out at the Água Limpa Farm of the Universidade de Brasília (UnB) from 2016 to 2018, in a randomized block design, with 12 treatments, 4 replicates and 6 plants/plot. At the harvesting time, six fruits per plot were randomly collected for the following physicochemical analysis: fruit mass, pulp mass with and without seeds, length/longitudinal diameter, width/transverse diameter, length/width ratio, husk thickness, predominant color of the pulp (L*, C*, h*), number of seeds, seed size, total soluble solids content, total titratable acidity, total soluble solids/total titratable acidity ratio and pH. High heritability values and relation of genetic/environment variation coefficients ratio were observed for most of the characteristics evaluated. The genotypes of yellow passion fruit MAR20#21 P2 x FB 200 P1 R2 and MAR20#19 ROXO R4 x ECRAM P3 R3 showed the best characteristics of fruit mass and pulp mass with seed. All the genotypes studied showed values of total soluble solids above 11ºBrix. Positive and significant correlation was observed between fruit mass and length/width ratio, indicating that oblong fruits have higher fruit mass.

Download Full-text

Intercropping Pineapple With Rice or Cowpea: An Alternative for Family Farming in the State of Tocantins, Brazil

Journal of Agricultural Science ◽

10.5539/jas.v11n4p288 ◽

2019 ◽

Vol 11 (4) ◽

pp. 288

Author(s):

S. C. Siebeneichler ◽

E. R. Santos ◽

R. A. Veloso ◽

M. A. B. Pereira ◽

R. F. F. Brito ◽

...

Keyword(s):

Cropping System ◽

Titratable Acidity ◽

The State ◽

Soluble Solids ◽

Family Farming ◽

Fruit Length ◽

Growing Period ◽

Pineapple Fruit ◽

Fruit Mass

Pineapple is commonly planted in monoculture systems. It is a long-cycle crop that takes time to monetize, which hinders its cropping by small farmers. The objective of this work was to evaluate the production and quality of pineapple with short-cycle crops, at the beginning of the growing period, as an alternative for family farming in the state of Tocantins. The experimental design was randomized complete block with three treatments and four replications. The pineapple was intercropped with rice and cowpea. The treatments consisted of T1: pineapple + rice; T2: pineapple + cowpea and T3: pineapple in monoculture. The evaluated variables of the pineapple fruit were pH, soluble solids, titratable acidity, yield, fruit mass, fruit length with crown, fruit length without crown and fruit circumference. For the rice and cowpea, the yield and the Area Equivalence Index (AEI) were determined. The cropping system did not influence the pineapple fruits quality. The pineapple yielded less. Cowpea yielded more when intercropped with pineapple. The AEI of the pineapple + rice intercropping was 2.07, being feasible for increasing the use of the area by 100%. The AEI of the pineapple + cowpea intercropping was 2.48, being feasible as it increased the use of the area by 148%. The results obtained showed that it is possible to intercrop pineapple with rice or cowpea at the beginning of pineapple cultivation, and it can be a viable alternative for family farming.

Download Full-text

‘Maciel’ peach tree development grafted on ‘Flordaguard’ clonal rootstock in different periods

Agronomy Science and Biotechnology ◽

10.33158/asb.2017v3i2p74 ◽

2017 ◽

Vol 3 (2) ◽

pp. 74

Author(s):

Aline Ramm ◽

Márcia Wulff Schuch ◽

Cíntia de Moraes Fagundes ◽

Jacqueline Barcelos da Silva Silva ◽

Roseane Maidana Moreira

Keyword(s):

Titratable Acidity ◽

Soluble Solids ◽

Plant Production ◽

Peach Tree ◽

Trunk Diameter ◽

Physical Chemical ◽

Dormant Bud ◽

Canopy Volume ◽

Tree Development

The objective of this study was to compare the vegetative and productive aspects and the quality of “Maciel” peach fruits grown on ‘Flordaguard’ clonal rootstock obtained from mini-cuttings, in different grafting periods (active bud and dormant bud). The experiment was conducted in an orchard located at Centro Agropecuario de Palma, in the county of Capao Leao, by Universidade Federal de Pelotas, RS (UFPel), from 2014/15 to 2015/16. The following variables related to the vegetative aspects were evaluated: canopy volume, trunk diameter, branch diameter, plant height, phenology (initial, full and final flowering) , productive aspects, estimated productivity (t.ha-1), production (kg. plant), production effectiveness, fruit diameter and physical-chemical characteristics such as firmness, color, pH, titratable total acidity, soluble solids, soluble solids/ titratable acidity relationship, antioxidant capacity, phenolic compounds and carotenoids. The most recommended grafting method for the ‘Maciel’ peach tree on ‘Flordaguard’ rootstock propagated by mini-cuttings is the active bud grafting.

Download Full-text

PRODUCTION, PHYSICAL-CHEMICAL QUALITY AND BIOATIVE COMPOUNDS OF MISTY BLUEBERRY FRUIT UNDER DIFFERENT PRUNING INTENSITIES

Revista Brasileira de Fruticultura ◽

10.1590/0100-29452016158 ◽

2017 ◽

Vol 39 (spe) ◽

Author(s):

GISELY CORREA DE MOURA ◽

◽

MARCIA VIZZOTTO ◽

LUCIANO PICOLOTTO ◽

LUIS EDUARDO CORRÊA ANTUNES ◽

...

Keyword(s):

Fruit Size ◽

Titratable Acidity ◽

Fruit Production ◽

Soluble Solids ◽

Postharvest Quality ◽

Yield And Quality ◽

Physical Chemical ◽

Total Titratable Acidity ◽

Phytochemical Compounds

ABSTRACT The objective of this study was to evaluate the effect of pruning intensity on yield and quality of blueberries fruits. It was evaluated the cultivar Misty. The treatments were: absence of pruning; light pruning; regular pruning and drastic pruning. The experimental design was randomized blocks with four replications. The variables analyzed were fruit production, fruit size, pH, total soluble solids (TSS) and total titratable acidity (TTA), and the bioactive compounds such as phenolic compounds, anthocyanins and antioxidant activity. The plants that received drastic pruning showed higher averages of production and fruit size. The highest concentrations of phytochemical compounds in blueberry fruits occurred as pruning was more drastic. The use of different intensity of pruning can modify the productive behavior and postharvest quality of fruits.

Download Full-text