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In summary, continuous vase application of citric-Kathon, soda, or citric-Greenshield resulted in the best postharvest performance of marigold and sunflower, and continuous treatment with citric-Al or pulsing with citric-Kathon resulted in the best postharvest performance of cut roses; all of the aforementioned treatments resulted in a vase life similar to those of commercial preservatives. However, mixtures containing lemon juice or citric acid plus sugar had detrimental effects and should not be used for longer periods to handle cut stems of rose or sunflower.

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