EFFECT OF BORIC ACID ON FLOWERS LONGEVITY OF TWO CULTIVARS OF Dianthus caryophyllus L.

Abstract

This experiment was carried out at the Horticulture Department، Collegeof Agriculture and Forestry، Mosul University- Iraq، on Dianthus caryophyllusL. plants cvs. Jeanne Dionis Blano (white flower) and Marie Chabaud Jaune(yellow flower)، to investigate the effect of pulsing treatments of two cultivarsflowers at two concentrations of boric acid 200 and 400 mg/liter in addition tocontrol treatment. The Factorial Experiment was conducted with CompletelyRandomized Design. Each treatment replicated three times with 3 flowers. Theresults were summarized as follows: Plants of white flowers cultivarsmanifested the significant results in vase life، water uptake، change in flowerdiameter percent after 3 days of vase life and The highest percentage of theconcentration of total sugars in flower at initial stage of vase life. Flowerspulsed in 200 mg/liter of boric acid gave significant higher values of vase life8.3 days، water uptake 17.48 cm3، change in fresh weight percent after 3 days ofvase life 108.1%، flower diameter percent after 3 days of vase life122.9% andpercentage of the concentration of total sugars in flowers at initial stage of vaselife 0.31% comparison with control. . In general، pulsing treatment 24h with at200 mg/liter of boric acid gave best results of vase life of two cultivars.