Flowering in pineapple as influenced by ethephon and its combinations with urea and calcium carbonate |
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| Authors: | HC Dass GS Randhawa SP Negi |
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| Institution: | Indian Institute of Horticultural Research, Bangalore India |
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| Abstract: | An investigation was carried out to increase the efficacy of ethephon by combining it with urea and calcium carbonate for induction of flowering in pineapple, with the main objective of lowering the concentration of ethephon. Ethephon at a concentration as low as 25 ppm in combination with urea (2%) and calcium carbonate (0.04%) was able to induce more than 90% flowering after 50 days of treatment. Addition of either urea or calcium carbonate increased the effectiveness of ethephon for induction of flowering. Ethephon treatments were found to be markedly superior to planofix and the control. In the case of the control, plants started flowering 250 days after treatment and completed it after 340 days. Apart from earlier flowering, ethephon treatments resulted in uniform ripening, and harvests were complete within 10 days, whereas in the control harvests continued for about 70 days. The increased efficacy of ethephon at a lower concentration for induction of flowering, with the addition of urea and calcium carbonate, is of great significance as this will lead to decreased costs and increased commercial use. |
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