Techniques for long-term storage of table grapes

1977 ◽  
Vol 17 (88) ◽  
pp. 866
Author(s):  
PR Hedberg
Keyword(s):  
Table Grape ◽  
Storage Life ◽  
Polyethylene Liner ◽  
Two Stage ◽  
Table Grapes ◽  
Long Term Storage ◽  
Loose Packing ◽  
Grape Quality ◽  
Term Storage

Table grape storage experiments were conducted in 1974 and 1975 with Nyora grapes to enable the extension of marketing periods. Grapes were packed in half-bushel (450 mm x 290 mm x 135 mm) boxes and stored in a standard cool room with various treatments. In 1974 two-stage SO2 generators, polyethylene liners and tight or loose packing were compared using grapes treated with field benomyl sprays. SO2 generators proved very effective in maintaining grape quality, particularly when used with polyethylene liners and a loose pack, enabling a storage life of four months. In 1975 the best treatment was reassessed in both wooden boxes and the cheaper cardboard box. Unwaxed cardboard boxes were inferior to wooden boxes for storing grapes. Field benomyl sprays were marginally beneficial in controlling moulds in storage. In 1975 benomyl treated grapes packed loose with a polyethylene liner and two-stage SO2 generators, were kept in an acceptable condition for six months.

scholarly journals The effect of aerosol treatment with calcium-based preparation on quality of table grape cultivar during storage

2021 ◽  
Vol 232 ◽  
pp. 03023
Author(s):  
Sofia Cherviak ◽  
Svetlana Levchenko ◽  
Vladimir Boyko ◽  
Dmitriy Belash
Keyword(s):  
Weight Loss ◽  
Table Grape ◽  
Oxidative Enzymes ◽  
Organoleptic Properties ◽  
Table Grapes ◽  
Long Term Storage ◽  
Organoleptic Characteristics ◽  
Term Storage

The main problems of grape storage are berry dehydration and rot. One of the solutions to reduce rot and preserve the quality of grapes during storage is the use of aerosol treatment with calcium content before storing. The aim of the study was to evaluate the effect of physiologically active substances based on calcium in various concentrations on the quality and organoleptic characteristics of table grape cvs. ‘Italia’ during long-term storage. The effectiveness of the studied systems of treatment was evaluated according to the content of sugars and titratable acids, the activity of the redox enzymes of polyphenol oxidase and peroxidase, weight loss of bunch and organoleptic properties. The greatest effectiveness established by using preparation of Master Green Ca, Brentax KCa, and Brentax Ca (in concentration 150g / 20l). Experimental treatments significantly decreased the weight loss of bunch (less than 4%), and preserved organoleptic properties of berry at a high level (8.2-8.9 points). Decrease in the activity of oxidative enzymes had a positive effect on the quality of table grapes and contributed to its better preservation. The data obtained make it possible to rationalize the system of long-term storage of grapes by using of aerosol treatment with calcium-based preparation.

scholarly journals Determining the pectinesterase enzyme activity when storing table grape varieties depending on the degree of ripening

2021 ◽  
Vol 6 (11 (114)) ◽  
pp. 43-51
Author(s):  
İlhama Kazimova ◽  
Ahad Nabiyev ◽  
Elza Omarova
Keyword(s):  
Enzyme Activity ◽  
Statistical Processing ◽  
Table Grape ◽  
Raw Material ◽  
Table Grapes ◽  
Long Term Storage ◽  
Red Grape ◽  
Grape Varieties ◽  
Term Storage

Grapes are rich in easily digestible carbohydrates, mineral compounds, vitamins, phenolic compounds. and other vital components. It is known that fresh grapes can be used from September to December. To prolong the terms of consumption of this valuable raw material, the most appropriate varieties and conditions for storing grapes have been determined. White, pink, and red grape varieties were taken as the object of research. The changes in the activity of the pectinesterase enzyme were determined depending on the degree of ripening of table grape varieties, the change in the pectinesterase enzyme during storage of table grape varieties in various variants was investigated. Statistical processing and calculation of variations in the indicators of changes in the activity of the enzyme pectinesterase were performed, depending on the degree of ripening of grapes of the Shamakhi Marandi variety. During the study, the pectinesterase enzyme remained more stable in mature varieties. This means that in ripe table grape varieties, the absorption of nutrients in the respiratory process is significantly slowed down. However, as they mature, the activity of the pectinesterase enzyme gradually increases. Therefore, for long-term storage in refrigerated chambers, fully ripe varieties of table grapes were used; to this end, grapes of the white Ganja table variety, the pink Shamakhi Marandi variety, and the red Black Asma variety are more suitable. The comparison of the investigated variants showed that table grape varieties, when stored in a refrigerated chamber in a controlled atmosphere, at 3–4 % CO2 and 2–3 % O2, retain better quality than other variants. When storing table grape varieties of various variants in the refrigerator, the enzyme activity decreases but is not completely suppressed.

scholarly journals Variability of biological traits of genotypes in the ‘Talisman x Asma’ crossing population

2021 ◽  
pp. 218-225
Author(s):  
В.В. Лиховской ◽  
И.А. Васылык ◽  
Н.А. Рыбаченко
Keyword(s):  
Female Parent ◽  
Biological Traits ◽  
Bisexual Flower ◽  
Erysiphe Necator ◽  
Table Grapes ◽  
Long Term Storage ◽  
Flower Type ◽  
Term Storage ◽  
Hybrid Forms

Целью исследований было изучение биологических особенностей новых гибридных форм винограда и степень их изменчивости. Гибридные формы столового винограда получены путем гибридизации обработанной колхицином материнской формы Талисман. Скрещивания проведены в 2011 г. в направлении создания крупноягодных столовых сорто-форм среднепозднего и позднего срока созревания, предназначенных для длительного хранения. Установлено что к 2020 г. всего 77 % растений в популяции сеянцев вступили в пору плодоношения, из них у 21 сеянца определен обоеполый тип цветка и у 30 растений тип цветка определен как функционально женский. Продукционный период в популяции сеянцев варьирует от 119-150 дней; наибольшую группу составляют сеянцы со средним сроком созревания (135-145 дней) - 65 % растений. Коэффициент плодоношения в популяции сеянцев находится в пределах 0,49±0,09, а коэффициент плодоносности - 1,17±0,09. При этом коэффициент плодоношения варьирует в значительно большей степени, чем коэффициент плодоносности. Отмечено низкое среднее значение полученного фактического урожая в популяции сеянцев относительно сортов-родительских форм; однако данные вариационного анализа указывают на присутствие в данной популяции растений, характеризующиеся как очень низкой урожайностью, так и высокой (V = 67-69 %). В популяции сеянцев на естественном инфекционном фоне выделены генотипы с высокой устойчивостью к оидиуму (Erysiphe necator) - более 20%. На основе статистического анализа комплекса признаков выделена группа из 29 сеянцев для дальнейшего изучения. Предварительно выделены в качестве элитных форм Магарач №19-11-3-20 (для длительного хранения) и Магарач № 19-11-3-53, М.№19-11-4-17. The aim of the research was to study the biological characteristics of new hybrid forms of grapes and the degree of their variability. Hybrid forms of table grapes are obtained by hybridization of the treated with colchicine female parent of ‘Talisman’. Crossings were carried out in 2011 in the direction of creating large-berry table varieties of medium-late and late ripening, intended for long-term storage. It was established that by 2020 only 77% of the plants in the seedling population entered the season of fruiting, 21 seedlings of which had a bisexual flower type and 30 plants had a flower type defined as functionally female. The production period in the population of seedlings varies from 119 to 150 days; the largest group consists of seedlings with an average ripening period (135-145 days) - 65% of plants. The coefficient of fruiting in the population of seedlings is within the range of 0.49±0.09, and the coefficient of fertility is 1.17±0.09. At the same time, the fruiting coefficient varies to a much greater extent than the fertility coefficient. There was a low average value of actual yield obtained in the population of seedlings relative to the varieties - parental forms; however, the data of analysis of variance indicate the presence of plants in this population, characterized by both very low and high cropping capacity (V=67-69%). In the population of seedlings against a natural infectious background, genotypes with high resistance to powdery mildew ( Erysiphe necator ) - more than 20% were identified. On the basis of statistical analysis of the complex of characters, a group of 29 seedlings was selected for further study. The ‘Magarach No. 19-11-3-20’ (for long-term storage) and ‘Magarach No. 19-11-3-53’, ‘M. No. 19-11-4-17’ were preliminarily identified as elite forms.

scholarly journals The effect of aerosol treatments with calcium-containing preparation on grape quality indicators during long-term storage

2021 ◽  
pp. 260-264
Author(s):  
А.В. Романов ◽  
В.А. Бойко ◽  
С.В. Левченко ◽  
Д.Ю. Белаш
Keyword(s):  
Quality Indicators ◽  
Sugar Accumulation ◽  
Polyphenol Oxidase Activity ◽  
Long Term Storage ◽  
Organoleptic Characteristics ◽  
Grape Quality ◽  
The Republic ◽  
Positive Effect ◽  
Term Storage

В статье представлены результаты применения аэрозольных обработок кальций-содержащим препаратом «Мастер Грин Ca», дана оценка показателей качества винограда в процессе длительного хранении. Исследования проводились в течение 2020 г. в условиях Республики Крым на столовых сортах винограда: Италия, Ред Глоуб, Шоколадный и Молдова. Применение аэрозольных обработок способствовало изменению динамики относительного сахаронакопления сортов Молдова, Ред Глоуб и Италия, к концу хранения массовая концентрация сахаров превышала контрольные значения в диапазоне 3,9-17,6 %. Отмечено снижение активности полифенолоксидазы в опытных вариантах: у сорта Италия после 30 и 90 суток хранения - на 43 и 5 % соответственно, у сорта Ред Глоуб к концу хранения активность снизилась на 40,8 %. Установлено снижение значений естественной убыли массы винограда при применении аэрозольных обработок исследуемым препаратом: у сорта Ред Глоуб - на 44,6 %, у сорта Шоколадный - на 8,5 %, у сортов Молдова и Италия - на 24,4 %. Аэрозольные обработки оказали положительное влияние на органолептические показатели в период хранения, обеспечив гибкость гребня, сохранность естественного окраса, тургора ягод и гармоничности вкуса. Образцы винограда, обработанные препаратом «Мастер Грин Ca», были оценены на уровне 7,71 балла (Ред Глоуб) и 8,93 балла (Италия). The article presents the results of using aerosol treatments with calcium-containing preparation Master Green Ca, the assessment of grape quality indicators in the process of long-term storage is given. The studies were carried out during 2020 in the conditions of the Republic of Crimea on table grapevine cultivars: ‘Italia’, ‘Red Globe’, ‘Shokoladnyi’ and ‘Moldova’. Using of aerosol treatments contributed to changes in dynamics of relative sugar accumulation in the cultivars ‘Moldova’, ‘Red Globe’ and ‘Italia’; by the end of storage, the mass concentration of sugars exceeded the control values in the range of 3.9-17.6%. A decrease in the polyphenol oxidase activity in experimental variants was registered: for the cultivar ‘Italia’ after 30 and 90 days of storage - by 43 and 5%, respectively; for the cultivar ‘Red Globe’ by the end of storage the activity decreased by 40.8%. A decrease in the values of natural loss of grape weight when using aerosol treatments with the studied preparation was established for the cultivars: ‘Red Globe’ - by 44.6%, ‘Shokoladnyi’ - by 8.5%, ‘Moldova’ and ‘Italia’ - by 24.4%. Aerosol treatments had a positive effect on organoleptic characteristics during storage ensuring preservation of stem flexibility, natural color, turgor of berries and balanced flavor. Grape samples treated with Master Green Ca preparation were rated at the level of 7.71 points (‘Red Globe’) and 8.93 points (‘Italia’).

Unique techniques developed in Israel for short- and long-term storage of table grapes

2016 ◽  
Vol 63 (1) ◽  
pp. 2-6 ◽  
Author(s):  
Amnon Lichter ◽  
Tatiana Kaplunov ◽  
Yohanan Zutahy ◽  
Susan Lurie
Keyword(s):  
Gray Mold ◽  
Dust Particles ◽  
Prolonged Storage ◽  
Air Cooling ◽  
Table Grapes ◽  
Long Term Storage ◽  
Grape Quality ◽  
Dual Release ◽  
Forced Air ◽  
Term Storage

Gray mold caused by Botrytis cinerea and rachis browning due to desiccation are the two main factors that reduce table grape quality after harvest. For over 90 years treatments with the gas sulfur dioxide (SO2) have been in use to control decay. In Israel, two methods have been developed for grape storage: one for short-term storage and shipping, and one for extended storage of late ripening cultivars. The first is based on storage in cardboard boxes without liners, which shortens the forced air cooling time due to the reduction in packaging material. After cooling the pallets are wrapped around with linear low density polyethylene to contain the SO2 and the humidity. The second method involves storage in plastic boxes with modification of commercially available dual release SO2 pads, so that the pads release a continuous low rate of SO2 for a long period of over 4 months in cold storage. In this case as well, the pallet is wrapped on all sides in order to maintain the level of SO2 and high humidity. Moreover, for late season grapes, we established the efficacy of a postharvest disinfection treatment with ethanol in order to reduce the inoculum load before extended storage and to clean the grapes from accumulation of dust particles. These techniques allow prolonged storage for more than 3 months with minimal decay development combined with retention of grape quality.

scholarly journals Influence of form and size of a root on the storage life of kitchen beetroot

2021 ◽  
pp. 65-72
Author(s):  
Ludmila Pusik ◽  
Vlаdimir Pusik ◽  
Veronika Bondarenko ◽  
Ludmila Gaevaya ◽  
Nina Lyubymova ◽  
...  
Keyword(s):  
Storage Life ◽  
Long Term Storage ◽  
Mass Losses ◽  
Good Taste ◽  
Cylindrical Form ◽  
Small Roots ◽  
Round Form ◽  
Natural Losses ◽  
Term Storage

Kitchen beetroots have a series of high-value parameters: good taste properties, healing-prophylactic importance, ability to long-term storage. There are many sorts of kitchen beetroot, different by root form. Most widespread are ones of the round and cylindrical forms. At the same time plants of kitchen beetroot at growing form roots of different masses. The aim of the study was to investigate the storage life of kitchen beetroot depending on form and root sizes. The conducted studies give a possibility to substantiate scientifically an influence of kitchen beetroots’ form and sizes on their storage life for determining its term. It has been established, that roots of the round form of the Kharkiv Bordo sort lost moisture more intensively at the expanse of breath and evaporation – 4.4–5.4 %. In the Vital sort with roots of the cylindrical form, mass natural losses were 4.1–5.1 %. At that more natural mass losses were in small roots with mass 150–300 g. Small roots were more inclined to sprouting at storage. Among sprouted roots, 1.6–1.8 % were small ones with mass 150–300 g. More percent of sprouted roots was for ones with mass 500–700 g as 2.3–2.5 %. At that less percent of sprouted roots was in the Vital sort of the cylindrical form. Small roots with mass 150–300 g were more damaged by rots at storage – 10.4–12.3 %. Among roots of middle sizes, 6.0–6.8 % were damaged by rots, among big ones – 4.5–4.7 %. It must be also noted, that cylindrical roots of the Vital sort were less damaged by rots at storage than round ones of the Kharkiv Bordo sort

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