Articles
Salicylic acid as alternative treatment for sulfur dioxide to control rot incidence and improve the quality of cold stored Flame Seedless grapes
Article number
1336_49
Pages
371 – 378
Language
English
Abstract
Grapes suffer from some of the problems of export and supply, the most important of which is the rot incidence, water loss, rachis browning and berries shattering.
Sulfur dioxide (SO2) is used commercially either by fumigation or releasing pads to prevent the growth of Botrytis cinerea rot during trading and storage, but alternative methods are needed to avoid SO2 residues.
The present study focused on the reduction of SO2 application by using salicylic acid (SA) as natural and safe antimicrobials.
Grapes (Vitis vinifera L. Flame Seedless) clusters were treated with distilled water (passive control), dual release SO2 pads (active control), 1 and 2 mM SA. Afterward, the clusters were left to surface dry, randomly packed in perforated (4% ventilation) plastic punnets (approximately 450 g), put in carton boxes, cooled and stored at 0°C with 95% relative humidity (RH). After 10, 20 and 30 days of storage a group of each treatment was transferred to shelf-life for two days at 20°C and then evaluated.
The results showed that SA at concentration of 2 mM reduced rot incidence, weight loss, rachis browning and berries shattering up to 20 days at 0°C plus two days shelf-life at 20°C. This treatment can be recommended as alternative to SO2 dual release pads to control rot and keep grape quality during short supply chain up to 20 days, with lower impacts for the environment.
Sulfur dioxide (SO2) is used commercially either by fumigation or releasing pads to prevent the growth of Botrytis cinerea rot during trading and storage, but alternative methods are needed to avoid SO2 residues.
The present study focused on the reduction of SO2 application by using salicylic acid (SA) as natural and safe antimicrobials.
Grapes (Vitis vinifera L. Flame Seedless) clusters were treated with distilled water (passive control), dual release SO2 pads (active control), 1 and 2 mM SA. Afterward, the clusters were left to surface dry, randomly packed in perforated (4% ventilation) plastic punnets (approximately 450 g), put in carton boxes, cooled and stored at 0°C with 95% relative humidity (RH). After 10, 20 and 30 days of storage a group of each treatment was transferred to shelf-life for two days at 20°C and then evaluated.
The results showed that SA at concentration of 2 mM reduced rot incidence, weight loss, rachis browning and berries shattering up to 20 days at 0°C plus two days shelf-life at 20°C. This treatment can be recommended as alternative to SO2 dual release pads to control rot and keep grape quality during short supply chain up to 20 days, with lower impacts for the environment.
Authors
K.A. Farouk, G.A. Baghdady, M.Z. Sultan
Keywords
grapes, rot incidence, browning, postharvest, salicylic acid
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