Effect of plant growth regulators on growth, flowering and corm production ofgladiolus cv. Snow Princess

摘要

Gladiolus is one of the important flower crops in India as well as in the world and is referred to as the queen of bulbous flowers. The fascinating spikes bear a large number of florets in a variety of colours which exhibit varying sizes and forms, with smooth, ruffled, deeply crinkled or lacinated petals. An attempt was made to investigate the effect of gibberellic acid (GA_3), benzyl adenine (BA) and indole acetic acid (IAA) on growth, flowering and corm production of gladiolus cv. Snow Princess.Healthy and uniform sized corms (8-10 cm) of gladiolus cv. Snow Princess were used for conducting the present investigations during 2006-07. Three chemicals GA_3 (200, 500 and1 000 ppm), BA (25, 50 and 100 ppm) and IAA (100, 250 and 500 ppm) each at three levels were used as soaking (for 3 hr before planting), spraying [on 45~(th) day after planting@ 50 ml/10 plants using an atomizer of 500 ml capacity] and combination of soaking and spraying. The experiment was laid out in a randomized block design with 28 treatments in three replications including an untreated control. The crams were planted at a spacing of 40 cm x 15 cm with three replications each consisting 10 corms. Data recorded on vegetative growth, flowering and corm production was subjected to analysis of variance (Gomez and Gomez 1984).