Effect of Plant Growth Regulators on Growth and Flower Yield of Lisianthus (Eustoma grandiflorum) Under Prayagraj Agro Climatic Conditions

The experiment was carried out under naturally ventilated polyhouse conditions, Department of Horticulture, SHUAT S, Prayagraj, during November, 2023 to April, 2024. The experiment was laid out in Completely Randomized Design (CRD) with three replications. There were ten treatments comprising of CCC, GA3, NAA at different concentrations viz., GA3 (100, 200, 300) ppm and CCC (250, 500, 750) ppm and NAA (30, 45, 60) ppm along with control. The results revealed that foliar application of 300 ppm GA3 for Lisianthus, significantly enhanced the treatment T3 - GA3 at 300 ppm was found in superior among other treatments in terms of plant height (20.66cm), number of leaves (33.06), plant spread (11.3cm), stem diameter (3.23cm), leaf area (15.43cm2), bud length (2.62cm), number of buds per plant (6.43), stalk length (5.70cm), Number of flowers per plant (6.43), number of branches per plant (3.12),chlorophyll content (66.10), minimum number of days for bud initiation (122.50), Flower yield per plant (6.43), flower yield per 250m2 (40187.50), benefit cost rat io (4.08) per 250 m2 was also observed in T3 - GA3 at 300 ppm.