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Sheela V.

Institution: Professor, Department of Pomology and Floriculture, College of Agriculture, Vellayani, Thiruvananthapuram, Kerala

Country: India

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Effect of growth regulators on sucker production in exotic varieties of heliconia

http://manuscript.advancejournals.org/uploads/26b6260e02f7c9b1a46ffd3ba62335198a1593ea9dab3da125ba8227052ed763/Manuscript/6570.pdf

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 The demend of heliconias for cut flower trade is increasing day-by-day because of the long vase life, attractive colour and exotic shape. A study was  conducted to standardize growth regulators for enhacing propagation efficiency in  three  viz., St. Vincent Red (small erect type), Golden Torch Adrian (hybrid) and Sexy Pink (large pendent type) .  Two field trials were carried out for this purpose. Based on the results of the preliminary field trial, second experiment was laid out. At varietal level, significant difference was evident in the total number of suckers. In the first experiment, the variety St. Vincent Red (3.82) was significantly superior in terms of total number of suckers. However, in the second experiment, St. Vincent Red (4.06) was on par with Golden Torch Adrian (4.10). Application of growth regulators had pronounced effect on sucker production at all the stages during the first experiment when BA 750 mg l-1 produced the highest number (4.19) of total suckers. In the second experiment, variation was evident in the total number of suckers. Here, BA 850 mg l-1 produced the highest number (4.33) of suckers and it was on par with BA 700 mg l-1 (4.00) and GA3 650 mg l-1 (3.79). VG interaction exerted significant variation in the number of suckers. At varietal level, BA 750 mg l-1 produced the highest number of suckers in St. Vincent Red (4.75), GA3 500 mg l-1 in Golden TorchAdrian(4.63)and GA3 750 mg l-1 in Sexy Pink (4.00). Among VG treatment combinations in the second experiment, the highest number of suckers (4.75) in the variety St. Vincent Red was produced by BA 700 mg l-1. The varieties Golden Torch Adrian (4.88) and Sexy Pink (3.75) recorded the highest with BA 850 mg l-1. The economics of foliar application of growth regulators revealed that BA 850 mg l-1 significantly enhanced the profit in the varieties Golden Torch Adrian and Sexy Pink. Although negligible,BA 700 mg l-1 recorded slight positive response in the variety St. Vincent Red with respect to profit.