Author(s):

Vivak Ujjwal, Manoj Kumar Singh, Pavitra Dev, Mohit Chaudhary, Ashish Kumar and Saurabh Tomar

Abstract: GA₃ and NAA affect various aspects of plant physiology, mainly vegetative and flowering attributes including yield. A field experiment was carried out during 2015-16, at the Horticulture Research Center of Sardar Vallabhbhai Patel University of Agriculture and Technology, Meerut to find out the response of foliar application of GA₃ and NAA on vegetative and flowering attributes of tomato cv. Pusa Rohini. The two bio-regulators i.e. GA₃ and NAA ware used in different concentration i.e. GA₃ (20, 30, 40 and 50 ppm) and NAA (15, 20, 25 and 30 ppm) and Control (distilled water spray). All variables parameters related to vegetative growth and flowering parameters were significantly influenced by different concentrations of the plant bio-regulators. Results revealed that between both the growth regulators, the foliar application of GA₃ (50 ppm) registered significantly higher vegetative growth viz., plant height (101.45cm) & internodes length (6.20 cm) and flowering parameters viz., minimum number of days to first flowering (24.60) & maximum number of flower per plant (50.13) as compared to other treatments.

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