Vol. 12, Issue 6 (2023)

Author(s):
Punitha A, Uma Sankareswari R, Palanikumar M, Geethalakshmi I, Sumathi T, Adeline Vinila JE and Subha L

Abstract:
An investigation was undertaken to study the effect of exogenously applied growth substances on the growth and yield of Golden rod. The growth substances used were Gibberellic acid (GA₃ at 100, 150, 200 ppm), Chlormequat (CCC at 1000, 1500, 2000 ppm), Maleic hydrazide (MH at 500, 1000, 2000 ppm) and Salicylic acid (SA at 25, 50, 100 ppm). The growth substances were applied as foliar sprays at three stages viz., 15 days, 30 days and 45 days after transplanting with water spray as control. The growth parameters viz., plant height (66.93cm), flower stalk length (42.27cm), early flowering (71.07 days after transplanting) was significantly increased by the application of GA at 150 ppm also drastically reduced the number of days taken for 50 per cent flowering (74.30 days after transplanting). The yield parameters viz., number of flower stalks per meter square (36.50) and number of suckers per plant (8.60), maximum duration of flowering (33.13 days) and flower yield per meter square (1333.53 g) was significantly increased by the application of GA at 150 ppm whereas individual stalk weight (61.13g) was increased by the application of CCC at 1500 ppm. The application of GA at 200 ppm enhanced the vase life by 7.33 days.