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Maturity and Harvesting of Grapes. Next. Introduction. Maturity and Harvesting of Grapes. Grape is a non-climacteric fruit and its berries ripen only on the vine. Hence, ripening standards are practically applicable for harvesting. - PowerPoint PPT Presentation
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Maturity and Harvesting of Grapes
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Maturity and Harvesting of GrapesMaturity and Harvesting of Grapes
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Introduction
Maturity and Harvesting of Grapes
Grape is a non-climacteric fruit and its berries ripen only on the vine.
Hence, ripening standards are practically applicable for harvesting.
Grapes are used for table purpose, juice, wine and raisin making and hence maturity standards are slightly different for different purposes.
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Varieties and Colour
Several varieties of grapes are grown in India, with different shades of colours like
White (White Riesling),
Blue (Bangalore Blue, Pusa Navrang)
Dark red (Cardial)
Greenish Yellow (Arkavati, Perlette, Pusa Seedless, Thompson Seedless )
Golden Yellow (Gold) etc.
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Consideration for Ripe Grapes
Usually, grapes are considered ripe when the fruits have
reached the condition of accumulation of sugar and acid
contents, which are the best suited for intended use.
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Maturity
Maturity of fruits and vegetables is an
indication of the development of the crop
as a marketable product.
Selection of right stage of maturity for
harvest is an important aspect, which has
considerable influence on storage life and
quality and final acceptance by the
consumer.
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Definition
Maturity can be defined as “that stage at which a commodity
has reached a sufficient stage of development that after
harvesting and post-harvest handling (including ripening,
where required), its quality will be at least the minimum
acceptable to the ultimate consumer.”
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Maturity Indices
Banglore Blue at 12-14o Brix .
At harvest, the berries should have attained the following:
attractive appearance, and colour
good eating
TSS/acid ratio
Anab-e-Shahi should be harvested at 14-16o Brix,
For example,
Thompson Seedless at 18-22o Brix and
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Pusa Navrang
Pusa SeedlessPerlette
Thompson Seedless
Berry Size and colour of Different Grape varieties at Maturity
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The objective of harvesting is to:
Harvesting
Pick the fruits at the proper stage of maturity,
with a minimum damage,
as rapidly as possible and at a minimum cost
best achieved by hand harvesting in most fruits and vegetables
Harvesting can be done by hand and by mechanical means which have their merit and demerit.
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Harvesting Tools & Methods
Harvesting should be done in the morning or evening hours.
Harvesting should be done with the help of sharp knife or secateurs or clippers specially designed for grapes.
Harvested produce should be kept under shade or in cool place
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Let us sum upGrapes should be harvested after the Grapes should be harvested after the berries ripen on the vine and attain berries ripen on the vine and attain their colour.their colour.
Harvesting should be done with a Harvesting should be done with a suitable harvesting tool.suitable harvesting tool.
Harvested berries should be kept at Harvested berries should be kept at dry and cool place.dry and cool place.
Grape bunches are graded on the Grape bunches are graded on the basis of size of berries or colourbasis of size of berries or colour
These should be packed in ventilated These should be packed in ventilated CFB boxes and marketed.CFB boxes and marketed.
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