Vol. 11, Issue 12 (2022)

Author(s):
Priyanka R, Manasa TS and Sampada Mareguddikar

Abstract:
An experiment on Effect of plant growth regulators on corm and cormel yield per meter square and per hectare and corm and cormel diameter in gladiolus cv. summer sunshine” was conducted at Horticulture research Farm, SHUATS, Allahabad during 2018-19. Experiment was conducted by soaking the corms in different plant growth regulators at different concentrations for 24 hr the soaked corms were dried under shade for 2 hours and then planted. The treatment comprise of GA₃ (50, 100, 150ppm), IAA (100, 1 50, 200ppm), NAA (50, 100, 150ppm), thiourea (1000, 1500, 2000ppm) and control. Maximum diameter of corm (7.65cm) was recorded in the treatment with a GA₃@ 150 ppm, whereas, minimum corm diameter (3.38cm) was recorded in control. Significantly maximum diameter of the cormel was recorded in GA₃ at 150 ppm (2.06 cm). Whereas minimum was recorded in control (T₁₃) (0.64 cm). Corms treated with IAA @ 200ppm (T₃) produced significantly maximum number of corms per meter square (19.48), Whereas control (T₁₃) recorded the minimum number of corms per meter square (16.61).Corms treated with IAA @ 200ppm (T₃) produced significantly maximum number of corms per hectare (1,94,800),Where control (T₁₃) recorded the minimum number of corms per hectare (166066.67). Corms treated with IAA @ 200ppm (T₃) produced significantly maximum number of cormels per meter square (456.82) Where as control recorded the minimum number of cormels per meter square (307.74). Corms treated with IAA @ 200ppm (T₃ ) produced significantly maximum number of cormels per meter square (456.82). Whereas control recorded the minimum number of cormels per meter square (307.74). Corms treated with IAA @ 200ppm (T) produced significantly maximum number of cormels per hectare (4568233.33), Where control (T₁₃) recorded the minimum number of cormels per hectare (3077366.67).