Studies were undertaken during 1970-72 to investigate the effects of MH, CCC, GA and TIBA at varying concentrations on the growth and flowering of two chrysanthemum varieties. The results revealed that plant treated with GA at concentrations ranging from 100 to 400 ppm showed an increase of the plant height, internode length and flower stalk length. A marked early flowering was noted with GA in all concentrations while marked delay in flowering was noted with MH at 1000 ppm and 2000 ppm. The longest duration of flowering and the highest yield were recorded by GA. Reduction in yield was noted with MH and CCC (all concentrations) and TIBA (200 ppm) in the variety Yellow, and MH 1000 ppm and 2000 ppm, CCC 5000 ppm and 15000 ppm and TIBA 100 ppm and 200 ppm in the variety White.
Shanmugam et al. (1973) studied this question.