Vol. 5 (3) : May-June 2014 issue
Green Farming Vol. 5 (3) : 489-491 ; May-June, 2014
Effect of plant growth regulators and spacings on vegetative growth and flower yield of African marigold
J. HARITHA NAIDU1, P. ASHOK2*, R. CHANDRA SEKHAR3 and K. SASIKALA4
Deptt. of Horticulture, Horticulture College & Research Institute, Dr. Y.S.R. Horticulture University, Venkatramannagudem- 534 101 Dist. West Godavari (Andhra Pradesh)
Designation : 1P.G. Student, 2Scientist *(hortashok@gmail.com), 3Associate Dean, 4Assistant professor
Subject : Horticulture (Spices, Ornamental & Plantation Crops, Floriculture and Landscape Architecture etc.)
Paper No. : P-1213
Total Pages : 4
Received : 21 November 2013
Revised accepted : 04 May 2014
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Citation :
J. HARITHA NAIDU, P. ASHOK, R. CHANDRA SEKHAR and K. SASIKALA. 2014. Effect of plant growth regulators and spacings on vegetative growth and flower yield of African marigold. Green Farming Vol. 5 (3) : 489-491 ; May-June, 2014
ABSTRACT
A field study was conducted during 2010 to investigate the effect of plant growth regulators viz., NAA, Ethrel and GA3 at different concentrations 250 ppm, 350 ppm and 450 ppm and at different spacings 30 x 20 cm and 40 x 20 cm on vegetative growth and flower yield of African marigold cv. Pusa Narangi Gainda. The results revealed that GA3 and NAA had promotive effect on vegetative character like plant height. Ethrel suppressed plant height and enhanced plant spread and number of laterals. GA3 at 350 ppm advanced flowering, increased flower diameter and flower yield. Ethrel at 350 ppm increased number of flowers per plant and reduced flower diameter and flower weight. Among spacings, 30 x 20 cm enhanced plant height, inter nodal length and reduced plant spread, number of laterals, number of flowers, flower weight, flower size and yield per plant. Spacing of 40 x 20 cm enhanced the flower size, fresh flower weight, number of flowers and flower yield.
Key words :
African marigold, Flower yield parameters, Plant growth regulators, Vegetative growth.
