Author(s):

Ravikant Rajak, S Sengupta, AK Tiwary, Sudha Verma, Apurva Minz, Thakur Om Prakash Bibhuti and Varsha Rani

Abstract: Sweet potato (Ipomoea batatas L.) is an important member of the family Convolvulaceae, locally known as “shakarkand”, is commonly planted in flat to slightly rolling open areas. The crop is highly nutritive and an excellent source of carbohydrates, vitamin A, calcium, and phosphorus. Jharkhand is the 7th largest producer of sweet potato only after Orissa, UP, MP, Assam, WB and Bihar. Due to increasing demand of sweet potato, there is a need to increase its yield. Foliar application of growth regulators is reported to improve growth, early flowering, increased flowering and tuber yield. Growth regulators are also reported to improve yield of many horticultural crops those in which the underground part is economically important. Hence, the present investigation has been carried out in the experimental site of AICRP on tuber crops under the department of Horticulture, Faculty of Agriculture, Birsa Agricultural University, Kanke, Ranchi during the Kharif season of 2016. There were fifteen treatments used namely T1-Triacontanol (250 ppm), T2-Triacontanol (500 ppm), T3- Gibberellic Acid (50 ppm), T4 - Gibberellic Acid (100 ppm), T5 - Naphthalene Acetic Acid (25 ppm), T6 - Naphthalene Acetic Acid (25 ppm), T7 – Indole Acetic Acid (25 ppm), T8 - Indole Acetic Acid (50 ppm), T9 - Ethrel (150 ppm), T10 - Ethrel (300 ppm), T11- Maleic hydrazide (50 ppm), T12 - Maleic hydrazide (100 ppm), T13- Salicylic Acid ( 100 ppm), T14 - Salicylic Acid (200 ppm), T15 - Control (Only water spray). To find out feasibility of increment in growth of sweet potato by means of application of growth regulators on the till date most accepted variety of sweet potato, Sree Bhadra by the growers in the state of Jharkhand. Among the fifteen treatments used GA₃ at 100 ppm was found to record maximum yield parameters in cultivation of sweet potato

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