PrÃ-tratamento de uvas cv. Thompson Seedless cultivadas no Vale do SÃo Francisco com altas concentraÃÃes de CO2

AUTOR(ES)

Manoel Luiz de Melo Neto

DATA DE PUBLICAÇÃO

2009

RESUMO

Fungi that cause postharvest decay cause damage in grape-producing regions in the world, including the SÃo Francisco Valley, Northeast Brazil. To circumvent this problem in the tables grapes for the trade export, are treated with sachets of SO2 placed inside the package, whose effects on the quality of the grapes are discussed. One of the alternatives studied in relation to this method is the use of high CO2 in pre-treatment which has so far not been applied to Thompson Seedless table grapes, justifying this study aims to evaluate this technique in its conservation of the Valley, justifying this research, which aims to evaluate the use of this technique in its conservation. Thus, three experiments: 1. Rot symptoms were carried out by four procedures: mycelial discs; filter paper; drop; spray and control tested in ItÃlia Improved and Crimson table grapes with suspensions of Botrytis (105 and 106 conÃdias.mL-1) at 25 Â 1% RH C/80-90. 2. Thompson Seedless were inoculated with Aspergillus niger in four concentrations drop by and spray in three environmental conditions (ambient temperature, air conditioning and refrigeration storage). The data were submitted to the Tukey test at 1 and 5% probability. 3. Thompson Seedless were subjected to the treatments: control without inoculum; control with inoculum; sachet of metabisulphite; 10% CO2; 20% CO2 and 30% CO2 and subjected to 6 Â 1 C/85- 95% RH for 39 days. The soluble solids, titratable acidity, firmness, weight loss, total phenolic compounds, number of mycelium by berry and sensory analysis, were compared by Duncan. The atmosphere 10% CO2 retained the quality of grapes.

ASSUNTO(S)

uva thompson seedless â conservaÃÃo botrytis quality storage conservation crimson seedless crimson seedless nutricao armazenamento botrytis qualidade

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