Effect of plant Bio-Regulatores on Growth, Flowering and Seed yield in China Aster (Callistephus chinensis L. Nees) CV. Kamini

A field experiment was conducted to study the effect of plant bio regulators on growth, flowering and seed yield in China aster cv. Kamini at College of Horticulture, Rajendranagar, Hyderabad during rabi, 2013–14. The experiment was laid in randomized block design and replicated twice. Plant growth regulators viz., GA₃, salicylic acid, maleic hydrazide, alar and paclobutrazol were used in the experiment. The treatments were imposed as foliar sprays twice at 20 and 35 days after transplanting. The observations on growth parameters were recorded at three stages of plant growth viz., 30, 60 and 90 DAT. GA₃ 200 mg/l spray recorded significantly higher plant height (60.10 cm), number of primary branches per plant (24.60) and number of secondary branches per plant (61.45) at 90 DAT, number of flower's per plant (84.96), flower yield per plant (109.66 g), flower yield per hectare (16.58 t), seed yield per plant (9.98 g), seed yield per ha (1509.31 kg) and 1000 seed weight (2.01 g). GA₃ 200 mg/l foliar spray was found to be at par with SA 200 mg/l in respect of number of primary branches (23.86), flower yield per hectare (15.90 t), seed yield per plant (9.85 g) and seed yield per hectare (1489.65 kg). SA 200 mg/l foliar spray could be recommended for increased growth, flower and seed yield in China aster cv. Kamini as it is more cheaper than GA₃.