Effect of Azospirillum and PSB Inoculation on Growth and Flowering in Tuberose (Polianthes Tuberosa L.) Cv. Double

The present investigation was carried out during the year 2007. There were 16 treatment combinations consisting three levels of Azospirillum (1, 2, 3 g/plot) three levels of PSB (50, 100, 150 g/ plot), their interactions and one control. The well developed, average size bulbs were randomly planted in 20.5x16 cm plots according to treatments and replicated thrice. Results revealed that combined application of Azospirillum @ 3 g/plot and PSB @ 150 g/plot gave the better performance on all growth and flowering parameters studied as compared to other treatments.