EFFECT OF PLANT GROWTH REGULATORS ON VEGETATIVE AND ROOT TUBER YIELD CHARACTERS OF ORANGE FLESH SWEET POTATO VARIETIES

G.KOTESWARA RAO¹*, P. ASHOK², D.V. SWAMI³, K. SASIKALA^4
1Department of Vegetable Science, College of Horticulture, Dr Y.S.R. Horticultural University, Venkataramannagudem, Andhra Pradesh 534101, India
²Horticultural Research Station, Dr Y.S.R. Horticultural University, Venkataramannagudem, Andhra Pradesh 534101, India
³Horticultural Research Station, Dr Y.S.R. Horticultural University, Venkataramannagudem, Andhra Pradesh 534101, India
⁴Horticultural Research Station, Dr Y.S.R. Horticultural University, Venkataramannagudem, Andhra Pradesh 534101, India
* Corresponding Author : sasiagron@yahoo.in

Received : 24-05-2017     Accepted : 05-06-2017     Published : 30-06-2017
Volume : 9     Issue : 30       Pages : 4403 - 4407
Int J Agr Sci 9.30 (2017):4403-4407

Keywords : Orange flesh sweet potato, Plant growth regulators, Root tuber Yield, Varieties, and Vegetative characters
Academic Editor : Dr Venkata Satish Kuchi
Conflict of Interest : None declared
Acknowledgements/Funding : I express my sincere gratitude to my teacher and chairman, Dr. P. Ashok, Scientist, Horticultural Research station, Venkataramannagudem, Dr.YSRHU, who have meticulously planned the undertaken Research programme
Author Contribution : G. Koteswara Rao- Carried out the entire research programme

A field experiment was conducted during kharif 2015-16 at Horticultural College & Research Institute, Dr. Y.S.R. Horticultural University, Venkataramannagudem (A.P) to find out the effect of plant growth regulators on orange flesh sweet potato varieties for vegetative and root tuber characters. Among the varieties tested, ST-14 registered significantly higher values for length of leaf lobe, leaf area, vine length, vine inter nodal length and number of branches per plant, while the width of leaf lobe, petiole length and number of flowers per plant were maximum in the variety Kamala sundari at 80 DAT. Spraying of GA3 @ 300 ppm showed maximum values for vegetative attributes. Significantly highest number of flowers per plant was recorded with the application of 2,4-D @ 15 ppm in the variety Kamala sundari. The higher values of plant dry matter percentage, number of root tubers per plant, root tuber length and root tuber yield per plant were recorded in the variety ST-14 by GA3 @ 300 ppm, while root tuber girth was maximum in the variety Kamala sundari by CCC @ 500 ppm.

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