Effect of different growth regulators on propagation of Mussaenda (Mussaenda erythrophylla ‘Rosea’) in subtropical zone of West Bengal

Abstract

An experiment was carried out to study the effect of different growth regulators on propagation of Mussaenda (Mussaenda erythrophylla ‘Rosea’) during rainy season in subtropical zone of West Bengal under naturally ventilated polyhouse. Significant differences among the treatments on root emergence and proliferation were noticed. All the growth regulators like IAA, IBA and NAA @1000, 2000, 3000 ppm significantly improved the rooting in cutting of Mussaenda over the control. Early rooting was observed in July month cuttings in all treatments than the June month cuttings. The highest percentage of rooting (80%) was observed in July month cuttings when treated with NAA @ 3000 ppm. The maximum number of roots (24.00/cutting) and root length (6.90 cm) was also recorded in the same treatment. Rooted cuttings were transferred to the earthen pots after 45 days of cutting, 98% cuttings survived and established, when cuttings were treated with NAA @ 3000 ppm in the month of July. But the most meaningful results for all the attributes were recorded with NAA @3000 ppm. This treatment was found most effective for rapid multiplication of Mussaenda through tip cuttings under subtropical zone of West Bengal.