PHYSIOLOGICAL STUDIES ON MATURITY INDICES AND STORABILITY OF EARLY SUPERIOR TABLE GRAPES. | ||||
| Journal of Plant Production | ||||
| Article 8, Volume 28, Issue 12, December 2003, Page 8341-8363 PDF (1.08 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jpp.2003.246339 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| M. A. A. Mohamed,; G. F. A. Hassan | ||||
| Fruit Handling Department, Hort. Res. Inst., Agr. Res. Center. | ||||
| Abstract | ||||
| This investigation was carried out during two Su~ssive seasons (2002 and 2003) at the Hort. Res. lnst., Fruil handling department rapes were picked from a private farm at Cairo-Alex desert road. To determine ma urity stage of Early Superior table grapes, samples were taken at weekly mtervals begining from the second week of May. At maturity stage. samples for storage studies were picked in the early morning and directly transported to the laboratory 10 be examined and packed In carton boxes (2kg I box) lined with perforated polyelhylene bags (luggage;, 40 Ii and 400 halls 1m3) and stored al room temp < /em>erature ( 27 ± 5 ) , SlC and olC and 90: 65 % RH, for 18 • 70 end 70 days. respectively, The Early Superior table grape is considered to be mature during the second week of JUly)(rreatmenl wilh dormancy agent is necessary}XAlso total soluble solid contents must be more than 15 %. total acidity contents less than 0.66 % and total soluble solid I total acidity rauo must be more than 25. As physical properties are more affected by the agricultural practice, It is nOI. always suitable for the determination of maturity stage for grapes. This study also confirmed that, Early Superior table grapes are very sensitive to the high temperature. The storage life of Early Superior table grape at room temperature did no: exceed 12 deys even with S01 fumigation treatment. Fumigation with S02 is necessary in order to keep quality of grapes during transport or storage especially when these periods were expected 10 exceed 21 days either at 5 Ie or 0 !C temperatures. This study also Indicated that grapes stored at 0 Ie had longer storabifily compared with grapes stored at 5 !e especially in (he first season. However, It is clear that, for short time storage or transport (less than 45 days), 5 IC will be sufficient to keep grapes quality. 'Mlile, for long time storage or transport, 0 IC will be necessary to keep grape quality. Therefore. in all previous cases, fumigation with S02 Is necessary | ||||
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