Abstract
Table grapes are fumigated with SO2 to control decay during storage and marketing. The efficacy of the treatment is affected by the type of packaging material used. Most fumigation schedules in commercial use were developed for grapes packed in wooden or wood/kraft veneer (WKV) boxes. In laboratory experiments, grapes packed in expanded polystyrene foam (EPF) boxes sorbed ca 50% less SO2 as did those in WKV boxes; grapes packed in fiberboard boxes sorbed ca 50% more SO2 than did those in WKV boxes. Adjusted fumigation dosages were developed that compensated for sorption by packaging materials and provided comparable concentration x time (CT) products in the fumigation chamber. Free SO2 residues in grapes packed in the three types of boxes and treated with the adjusted dosages were similar (0.11 - 0.13 µg/g); total SO2 residues were 2.3, 1.8, and 1.0 µg/g in grapes packed in WKV, EPF, and fiberboard boxes, respectively. All residues were below a proposed tolerance of 10µg/g. The adjusted schedules had comparable effects on decay control, stem condition, and bleaching of the berries.
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Claims 9
Claim · model-written summary
Grapes in EPF boxes sorbed about 50% less SO2 than grapes in WKV boxes.
Verbatim
e0“grapes packed in expanded polystyrene foam (EPF) boxes sorbed ca 50% less SO2 as did those in WKV boxes”
Claim · model-written summary
Grapes in fiberboard boxes sorbed about 50% more SO2 than grapes in WKV boxes.
Verbatim
e0“grapes packed in fiberboard boxes sorbed ca 50% more SO2 than did those in WKV boxes”
Claim · model-written summary
Adjusted fumigation doses compensated for packaging sorption and yielded comparable CT products.
- Taxon
- grapest0
- Treatment
- Adjusted fumigation dosagese0
- Outcome
- concentration x time (CT) productse0
- Direction
- comparablee0
- Setting
- fumigation chambere0
Not reportedComparator
Verbatim
e0“Adjusted fumigation dosages were developed that compensated for sorption by packaging materials and provided comparable concentration x time (CT) products in the fumigation chamber”
t0“Grapes”
Claim · model-written summary
Free SO2 residues under adjusted doses were similar across the three box types at 0.11 - 0.13 µg/g.
Verbatim
e0“Free SO2 residues in grapes packed in the three types of boxes and treated with the adjusted dosages were similar (0.11 - 0.13 µg/g)”
Claim · model-written summary
Total SO2 residues in WKV packed grapes were 2.3 µg/g.
Verbatim
e0“total SO2 residues were 2.3, 1.8, and 1.0 µg/g in grapes packed in WKV, EPF, and fiberboard boxes, respectively”
Claim · model-written summary
Total SO2 residues in EPF packed grapes were 1.8 µg/g.
Verbatim
e0“total SO2 residues were 2.3, 1.8, and 1.0 µg/g in grapes packed in WKV, EPF, and fiberboard boxes, respectively”
Claim · model-written summary
Total SO2 residues in fiberboard packed grapes were 1.0 µg/g.
Verbatim
e0“total SO2 residues were 2.3, 1.8, and 1.0 µg/g in grapes packed in WKV, EPF, and fiberboard boxes, respectively”
Claim · model-written summary
All SO2 residues were below the proposed tolerance of 10µg/g.
Verbatim
e0“All residues were below a proposed tolerance of 10µg/g”
t0“Grapes”
Claim · model-written summary
Adjusted schedules had comparable effects on grape decay control, stem condition and berry bleaching.
- Taxon
- Grapest0
- Treatment
- adjusted schedulese0
- Outcome
- decay control, stem condition, and bleaching of the berriese0
- Direction
- comparablee0
Not reportedComparator
Verbatim
e0“The adjusted schedules had comparable effects on decay control, stem condition, and bleaching of the berries”
t0“Grapes”
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Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.