Author(s):

Shivani P Tandel, Kiran Kumari, JR Vadodaria and Dhwani A Patel

Abstract: The investigation was aimed to find out the interactive effect of different levels of fertilizers and plant growth regulators on yield and economics of African marigold (Tagetes erecta L.) cv. ‘Pusa Narangi Gainda’. The experiment comprised three levels of fertilizers (100% RDF, 80% RDF and 60% RDF) and five different concentrations of plant growth regulators (water spray, 25 ppm GA3, 50 ppm GA3, 1 ppm Triacontanol and 2 ppm Triacontanol) was laid out in a Randomized Block Design with factorial concept and three replications. Results revealed that yield attributes such as fresh weight of single flower (6.06 g), flower diameter (6.25 cm), number of flowers per plant (64.86), flower yield per plant (318.26 g), per plot (2.79 kg) and per hectare (114.76 q) were found maximum with 100% RDF. Among plant growth regulators, two times application (30 and 60 DAT) of 50 ppm GA3 resulted in maximum fresh weight of individual flower (6.21 g), flower diameter (6.49 cm), number of flowers per plant (67.62), flower yield per plant (314.90 g), per plot (2.78 kg) and per hectare (114.49 q). The interaction between 100% RDF and 50 ppm GA3 was found superior with respect to fresh weight of single flower (6.59 g), number of flowers per plant (73.23), flower yield per plant (377.30 g), per plot (3.31 kg) and per hectare (136.35 q) as well as benefit cost ratio (1:1.85). It can be concluded that 100% RDF with two time foliar application (30 and 60 DAT) of 50 ppm GA3 gives higher yield and economic benefits in African marigold.

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