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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. O mofo cinzento das roseiras (Rosa hybrida), causado por Botrytis cinerea, requer muitas estratégias de manejo para seu controle. Botões de rosa (cv Kiss) foram submetidos ao pulsing com soluções de ácido cítrico, ácido salicílico, sulfato de cálcio, sacarose ou tiossulfato de prata (STS), para avaliar o efeito destes tratamentos sobre a severidade do mofo cinzento e a vida de vaso das flores. As soluções foram aplicadas a hastes colhidas em diferentes tempos em relação ao ponto de colheita, mas a variação no ponto de colheita não produziu efeitos significativos. O tratamento com STS reduziu os valores de área abaixo da curva de progresso da doença (AACPD) e de severidade máxima em 15% e 55%, respectivamente, e aumentou a vida de vaso das flores em 20%. O sulfato de cálcio reduziu consistentemente a AACPD em 66% e a severidade máxima em 88%, além de aumentar a vida de vaso em 37%. Portanto, o pulsing de botões de rosa com soluções de STS e sulfato de cálcio é um tratamento potencialmente útil para reduzir as perdas devidas ao mofo cinzento e para aumentar a vida de vaso das flores

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