Abstract
‘Italia’ grape is one of the most important table grape cultivars grown worldwide. Gray mold, caused by Botrytis cinerea Pers. Fr., is one of the most important causes of postharvest decay of table grapes, and the control of this disease is very difficult because postharvest treatments with synthetic fungicides are not allowed in many countries. The objective of this study was to compare different types of pads releasing different doses of SO2 during cold storage to control gray mold in ‘Italia’ table grapes grown under subtropical conditions. Grape bunches were harvested from a commercial field trained on an overhead trellis located at Cambira, state of Parana (PR), South Brazil. The grapes were packed into carton boxes (capacity, 4.5 kg) and subjected to the following SO2 pad treatments (Uvasys®, Cape Town, South Africa) under cold storage (1.0 ± 1 °C) for 50 days: (i) Control; (ii) SO2 slow release pad; (iii) SO2 dual release pad; (iv) SO2 dual release–fast reduced pad; (v) SO2 slow release pad with grapes inoculated with B. cinerea suspension; (vi) SO2 dual release pad with grapes inoculated with B. cinerea suspension; and (vii) SO2 dual release-fast reduced pad with grapes inoculated with B. cinerea suspension. After cold storage, the grape boxes were maintained for 7 days at room temperature (25 °C). The incidence of gray mold on the grapes, firmness, shattered berries, stem browning, as well as other physicochemical variables, such as bunch mass, bunch mass loss, skin color, soluble solids (SS), titratable acidity (TA) and SS/TA were evaluated. Both SO2 dual release pads were highly efficient in preventing the incidence of gray mold in ‘Italia’ grapes packed in clamshells during the 50-day period of cold storage and at room temperature, even with Botrytis-inoculated berries. The SO2 slow release pad showed lower efficiency, but was higher than the control. The SO2 dual release pad treatments provided the best results with respect to stem browning scores (fresh and green stems) during cold storage, and no differences were observed among the treatments with respect to the other physicochemical evaluations.
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Claims 5
Claim · model-written summary
Both SO2 dual release pads were highly efficient in preventing gray mold incidence in table grapes during cold storage, even with Botrytis-inoculated berries.
- Taxon
- table grapese1
- Treatment
- SO2 dual release padse3
- Outcome
- incidence of gray molde3
- Direction
- preventinge3
- Setting
- cold storagee0
BotrytisNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Gray mold, caused by Botrytis cinerea Pers. Fr., is one of the most important causes of postharvest decay of table grapes”
e3“Both SO2 dual release pads were highly efficient in preventing the incidence of gray mold”
e4“even with Botrytis-inoculated berries”
e0“during the 50-day period of cold storage”
Claim · model-written summary
The SO2 slow release pad showed lower efficiency against gray mold than the dual release pads.
Not reportedComparator
Verbatim
e1“Gray mold, caused by Botrytis cinerea Pers. Fr., is one of the most important causes of postharvest decay of table grapes”
e5“The SO2 slow release pad showed lower efficiency, but was higher than the control”
Claim · model-written summary
The SO2 slow release pad showed higher efficiency than the control.
Verbatim
e1“Gray mold, caused by Botrytis cinerea Pers. Fr., is one of the most important causes of postharvest decay of table grapes”
e5“The SO2 slow release pad showed lower efficiency, but was higher than the control”
Claim · model-written summary
SO2 dual release pad treatments gave the best results for stem browning scores during cold storage.
- Taxon
- table grapese1
- Treatment
- SO2 dual release pad treatmentse6
- Outcome
- stem browning scorese6
- Direction
- best resultse6
- Qualifier
- fresh and green stemse6
- Setting
- during cold storagee6
Not reportedComparator
Verbatim
e1“Gray mold, caused by Botrytis cinerea Pers. Fr., is one of the most important causes of postharvest decay of table grapes”
e6“The SO2 dual release pad treatments provided the best results with respect to stem browning scores (fresh and green stems) during cold storage”
Claim · model-written summary
No differences among the SO2 pad treatments were observed for the other physicochemical evaluations.
- Taxon
- table grapese1
- Treatment
- treatmentse7
- Outcome
- other physicochemical evaluationse7
- Direction
- no differencese7
Not reportedComparator
Verbatim
e1“Gray mold, caused by Botrytis cinerea Pers. Fr., is one of the most important causes of postharvest decay of table grapes”
e7“no differences were observed among the treatments with respect to the other physicochemical evaluations”
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