Effect of GA3 and Azotobacter on growth and flowering in African marigold (Tagetes erecta L.) cv. PUSA NARANGI GAINDA

Abstract

The field experiment was conducted at Horticulture Research Farm of Choudhary\rCharan Singh University campus, Meerut U.P. during 2011-12. The nine treatments A1\r(Azotobacter by root treatment 0.20g/15 plants), A2 (Azotobacter by soil treatment 0.40g/plot),\rG1 (Gibberellic acid 100 ppm spray at 30 DAT), G2 (Gibberellic acid 150 ppm spray at 30 DAT),\rA1G1 (Azotobacter by root treatment 0.20g/15 plants and gibberellic acid 100 ppm spray at 30\rDAT), A1G2 (Azotobacter by root treatment 0.20g/15 plants and gibberellic acid 150 ppm spray\rat 30 DAT), A2G1(Azotobacter by soil treatment 0.40g/plot and gibberellic acid 100 ppm spray at\r30 DAT ), A2G2 (Azotobacter by soil treatment 0.40g/plot and gibberellic acid 150 ppm spray at\r30 DAT) and A0G0 (No Azotobacter and no gibbrellic acid) were evaluated in Randomized Block\rDesign with three replications. The experimental finding revealed that the treatment A2G2 (Soil\rtreatment with Azotobacter + spray of GA3@ 150 ppm) gave the maximum plant height, maximum\rnumber of primary branches per plant, maximum number of secondary branches per plant,\rmaximum plant spread, minimum number of days taken for flower bud appearance, maximum\rnumber of flowers per plant, maximum flower diameter, maximum fresh weight of flowers per\rplant and maximum yield of flower in comparison to individual application of GA3 and\rAzotobacter.