Vol. 12, Issue 6 (2023)

Author(s):
Anjana Sisodia, Saipriya Panigrahi, Anil K Singh and Girish PM

Abstract:
The experiment was carried out the Horticulture Research Farm, Banaras Hindu University, Varanasi, U.P. during 2018-19. The treatments comprised of two growth regulators with three levels of each viz., GA₃ (50 ppm, 100 ppm and 150 ppm) and thiourea (0.5%, 1.5% and 2.0%) in addition to control and four levels of corm sizes (1.0 cm, 1.5 cm, 2.0 cm and 2.5 cm). The experiment was laid out in a Randomized Block Design with three replications. The results revealed that treatment of GA₃ at 50 ppm took minimum days for opening of florets (days) and withering of florets (days) and maximum diameter of florets (cm) and maximum length of floret (cm). Maximum number of florets opened in vase, number of florets opened at a time, spike length (cm), rachis length (cm), water uptake (ml) and vase life (days) was recorded with thiourea at 0.5%. Among various grades, early opening of florets (days), early withering of florets (days) and maximum diameter of floret (cm), length of floret (cm), number of florets opened in vase and spike length (cm) was obtained with grade 2.0 cm. Whereas, grade 2.5 cm recorded maximum number of florets opened at a time, rachis length (cm), water uptake (ml) and vase life (days). In interaction of doses of growth regulators and grade of corms, early opening of florets (days) and withering of florets (days) were obtained GA₃ 50 ppm with 1.5 cm. Whereas, maximum diameter of floret was recorded with thiourea 1.5% with 2.5 cm and length of floret (cm), number of florets opened in vase and water uptake (ml) were recorded maximum with thiourea 0.5% with 2.5 cm. Maximum number of florets opened at a time and rachis length (cm) was recorded maximum with combination of GA₃ 100 ppm with 2.5 cm. Maximum spike length was recorded with interaction of GA₃ 150 ppm with 2.0 cm while maximum vase life was with interaction of GA₃ 50 ppm with 2.5 cm.