EFFECT OF DIFFERENT COVERING EFFECT OF DIFFERENT COVERING MATERIALS USED AT PRE-HARVEST MATERIALS USED AT PRE-HARVEST STAGE ON QUALITY AND STORAGE STAGE ON QUALITY AND STORAGE LIFE OF SULTANA SEEDLESS GRAPES LIFE OF SULTANA SEEDLESS GRAPES Assoc. Prof. Fatih ŞEN 1 Aşkın ALTUN 1 , MSc Metin KESGİN 2 Yüksel SAVAŞ 2 1 Ege University, Faculty of Agriculture, Department of Horticulture, İzmir-TURKEY 2 Viticulture Research Station, Manisa- TURKEY 35th World Congress of Vine and Wine 19th June 2012, İzmir- TURKEY
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EFFECT OF DIFFERENT COVERING EFFECT OF DIFFERENT COVERING MATERIALS USED AT PRE-MATERIALS USED AT PRE-
HARVEST STAGE ON QUALITY HARVEST STAGE ON QUALITY AND STORAGE LIFE OF SULTANA AND STORAGE LIFE OF SULTANA
SEEDLESS GRAPESSEEDLESS GRAPESAssoc. Prof. Fatih ŞEN1 Aşkın ALTUN1 , MScMetin KESGİN2 Yüksel SAVAŞ2
1 Ege University, Faculty of Agriculture, Department of Horticulture, İzmir-TURKEY2Viticulture Research Station, Manisa-TURKEY35th World Congress of Vine and
Wine 19th June 2012, İzmir-TURKEY
INTRODUCTION
Grape is one of the most produced and well-known fruit crop all around the world
68 M tonnes
4.2 M tonnes
Source: FAOSTAT, 2011
Table grapes are mostly exported to Russian Federation followed by Germany, Ukraine and Bulgaria..
In the Aegean Region Sultana Seedless variety has been widely cultivated for both table and raisin production. Nearly 1.5 million tonnes of grapes is being produced in the Aegean provinces.
Source: Aegean Exporters Association
In the region, Sultana Seedless prices are at the lowest level when the supply peaks for the fresh market.
In November table grape prices are about 10-30% higher than the prices in September.
Thus supplying Sultana Seedless grapes for longer periods is needed for exportexport and domestic markets. There are two convenient solutions:
On-vine storageCold storage
In recent years, producers delay harvest time by covering vines with various covering materials.
Polypropylene cross-stitch is the common covering material in the Aegean Region.
AIM OF THE RESEARCH
The research work was carried out with different covers to examine their effects on grape quality and storage life.
Additionally, the effect of delayed harvest on fresh table grapes was assessed as continued with cold storage.
Material and MethodThe study was conducted on grapes cv. ‘Sultana Seedless’ in vineyard of Viticulture Research Station located in Manisa province between 2009 and 2011.
Cultural treatments were performed as recommended for the table grapes.
Covering materials were covered on vines in the first week of September in both years.
Polypropylene cross-stitch (PK) •made of polypropylene, •white coloured, •fabric covering material
Lifepack (LP) •has three layers •water-resistant •8% UV additive top layer