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Gray mold severity and vase life of rose buds after pulsing with citric acid, salicylic acid, calcium sulfate, sucrose and silver thiosulfate

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Author(s): Capdeville Guy de | Maffia Luiz A. | Finger Fernando L. | Batista Ulisses G.

Journal: Fitopatologia Brasileira
ISSN 0100-4158

Volume: 28;
Issue: 4;
Start page: 380;
Date: 2003;
Original page

Keywords: cut flowers | Rosa hybrida | Botrytis | Calcium | Silver thiosulfate | Postharvest

ABSTRACT
Gray mold of roses (Rosa hibrida) caused by Botrytis cinerea requires many management strategies for its control. The effect of pulsing rose cv. Kiss with solutions of citric acid, salicylic acid, sucrose, calcium sulfate, and silver thiosulfate (STS) on disease severity and vase life of the flowers was evaluated. The solutions were applied to cut stems at different stages of harvest, the variation in the opening stage of harvest did not affect the results. Pulsing with STS reduced the values of area under the disease progress curve (AUDPC) and of severity of disease by 15% and 55%, respectively, and increased the vase life of the flowers by 20%. Calcium sulfate consistently reduced AUDPC by 66% and maximum severity by 88%, and increased vase life of the flowers by 37%. Therefore, pulsing rose buds with solutions of STS and calcium sulfate is potentially useful in reducing losses due to gray mold after harvest and in extending the vase life.
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