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RETARDING DETERIORATION OF TABLE GRAPES WITH IN-PACKAGE SULFUR DIOXIDE GENERATORS WITH AND WITHOUT REFRIGERATION.

Author(s) : NELSON K. E.

Summary

EMPEROR GRAPES WERE PACKED IN VENTED CORRUGATED CARTONS, THEN INFECTED WITH BOTRYTIS CINEREA PERS. THE PACKS WERE EITHER NOT TREATED WITH SO2 OR GIVEN AN INITIAL SO2 ROOM FUMIGATION OR PROVIDED WITH A QUICK RELEASE (QR) IN-PACKAGE SO2 GENERATOR. AFTER 6 DAYS AT 298 K (25 DEG C) UNTREATED VENTED PACKS HAD 90% DECAYED BERRIES, THOSE THAT HAD BEEN ROOM FUMIGATED 55%, AND THOSE WITH THE GENERATOR 80%. GRAPES IN THE UNVENTED POLY LINERS HAD 1% DECAYED BERRIES AND THE STEMS WERE STILL GREEN AND THE BERRIES TURGID. UNVENTED PACKS HELD FOR 6 DAYS AT 283 AND 273 K (10 AND 0 DEG C) HAD RESPECTIVELY 1 AND 0% DECAYED BERRIES. SIMILAR EXPERIMENTS WERE MADE WITH < THOMPSON SEEDLESS > GRAPE AT 298 K (25 DEG C) THE SO2 TREATMENTS SIGNIFICANTLY RETARDED BROWNING OF STEMS. WEIGHT LOSS WAS 0.1% AFTER SIX DAYS FOR GRAPES IN AN UNVENTED LINER, BUT WAS 3.75% IF THE LINER HAD 0.23% VENTED AREA. WITH 0.92% VENTED AREA THE LOSS WAS 4.3% AND WITH A VENTED AST VALUE EXCEEDS SIGNIFICANTLY THE 5.7% WEIGHT LOSS FOR THE VENTED KRAFT LINER.

Details

  • Original title: RETARDING DETERIORATION OF TABLE GRAPES WITH IN-PACKAGE SULFUR DIOXIDE GENERATORS WITH AND WITHOUT REFRIGERATION.
  • Record ID : 1984-1481
  • Languages: English
  • Publication date: 1982/08
  • Source: Source: Proc. int. hortic. Congr., Hamburg/Acta Hortic.
    n. 138; 121-130; 2 fig.; 3 tabl.; 5 ref.
  • Document available for consultation in the library of the IIR headquarters only.

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