Abstract

Abstract Treatment with thiabendzole [2-(4’ thiazolyl) -benzimidazole] decreased the peak rate of autocatalytic ethylene production in bud cut carnations by 43%, delayed the onset of that peak by 2 days, and delayed flower fading by 3 days as compared with flowers treated with 8-hydroxyquinoline. Flowers treated with thiabendazole were less sensitive to applied ethylene. Flower fading was delayed by 48 hr following exposure to 15 ppm ethylene for 24 hr compared with 8-hydroxyquinoline-treated flowers. Diminishing the ethylene factor in the flower tissue is proposed as a possible mode of action of thiabendazole in delaying senescence of cut flowers.

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