RESPONSE OF GROWTH, FLOWERING AND CORM YIELD OF GLADIOLUS CV. PUNJAB MORNING TO PLANT GROWTH REGULATORS IN WINTER SEASON OF UTTARAKHAND TARAI REGION

An investigation was carried out to see the response of growth, flowering and yield of Gladiolus cv. Punjab Morning to plant growth regulators in winter season in winter season of Uttarakhand tarai region. Four growth regulators each at three levels viz., GA3 (75, 100 and 125 ppm), BA (75, 100 and 125 ppm), ethrel (250, 500 and 750 ppm) and thiourea (250, 500 and 1000 ppm) along with control were used as treatment in this experiment. The concentration of GA3 @ 100 ppm produced earlier sprouting (7.77 days), day to flowering (76.00 days), maximum plant height (78.79 cm), spike length (100.45 cm) and number of leaves (5.60). Maximum number of suckers (4.13) and number of corms/plot (68.33) were obtained from BA@ 75ppm. However, maximum value for number of florets (13.67), diameter of 2nd floret (8.33 cm) and weight of largest corm/plot (44.33 g) was recorded from GA3 @ 125ppm, ethrel @ 250 ppm and thiourea @ 250ppm, respectively