Preharvest Fungicide, Potassium Sorbate, or Chitosan Use on Quality and Storage Decay of Table Grapes

Potassium sorbate, a program of four fungicides, or one of three chitosan formulations were applied to clusters of 'Thompson Seedless' grape berries at berry set, pre-bunch closure, veraison, and 2 or 3 weeks before harvest. After storage at 2°C for 6 weeks, the natural incidence of postha...

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Veröffentlicht in:Plant disease. - 1997. - 97(2013), 3 vom: 05. März, Seite 307-314
1. Verfasser: Feliziani, E (VerfasserIn)
Weitere Verfasser: Smilanick, J L, Margosan, D A, Mansour, M F, Romanazzi, G, Gu, S, Gohil, H L, Ames, Z Rubio
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2013
Zugriff auf das übergeordnete Werk:Plant disease
Schlagworte:Journal Article
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520 |a Potassium sorbate, a program of four fungicides, or one of three chitosan formulations were applied to clusters of 'Thompson Seedless' grape berries at berry set, pre-bunch closure, veraison, and 2 or 3 weeks before harvest. After storage at 2°C for 6 weeks, the natural incidence of postharvest gray mold was reduced by potassium sorbate, the fungicide program, or both together in a tank mixture, in 2009 and 2010. In 2011, the experiment was repeated with three chitosan products (OII-YS, Chito Plant, and Armour-Zen) added. Chitosan or fungicide treatments significantly reduced the natural incidence of postharvest gray mold among grape berries. Berries harvested from vines treated by two of the chitosan treatments or the fungicide program had fewer infections after inoculation with Botrytis cinerea conidia. None harmed berry quality and all increased endochitinase activity. Chitosan decreased berry hydrogen peroxide content. One of the chitosan formulations increased quercetin, myricetin, and resveratrol content of the berry skin. In another experiment, 'Princess Seedless' grape treated with one of several fungicides before 4 or 6 weeks of cold storage had less decay than the control. Fenhexamid was markedly superior to the other fungicides for control of both the incidence and spread of gray mold during storage 
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700 1 |a Smilanick, J L  |e verfasserin  |4 aut 
700 1 |a Margosan, D A  |e verfasserin  |4 aut 
700 1 |a Mansour, M F  |e verfasserin  |4 aut 
700 1 |a Romanazzi, G  |e verfasserin  |4 aut 
700 1 |a Gu, S  |e verfasserin  |4 aut 
700 1 |a Gohil, H L  |e verfasserin  |4 aut 
700 1 |a Ames, Z Rubio  |e verfasserin  |4 aut 
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