Response of Gibberellic Acid and Corm Division on Floral Attributes of Gladiolus

Abstract

This study was conducted to assess the response of Gibberellic acid and corm division on floral attributes of gladiolus cv. Punjab Dawn at Horticulture Research Farm of Institute of Agricultural Sciences, Banaras Hindu University, Varanasi, India during two consecutive year (2017-2019). The treatments comprised of growth regulators with two concentration i.e. GA3 100 ppm and 200 ppm including control (distilled water) and corms which are cut having 1bud, 2 buds and 3 buds and whole corm having 4 buds, 5 buds and 6 buds. The experiment was laid out in Randomized Block Design and three replications. The flowering characteristics of Gladiolus are mainly affected by higher concentration of GA3 (200 ppm) as well as whole corm under natural climatic condition. Regarding flowering parameters, it was found that GA3 200 ppm and whole corm i.e. 4 bud, 5 bud and 6 bud influence the quality and quantity parameters, viz. days to spike emergence, days to colour show, days to opening of florets, days to open florets without withering of basal floret, number of florets per spike, longevity of spike, length of spike and rachis (cm) and diameter of florets (cm) as compared to other treatments of GA3 100 ppm and control (distilled water) and cut corms which have 1 bud, 2 buds and 3 buds.