Author(s):

TK Chowdhuri and R Sadhukhan

Abstract: The present investigation was carried out to study the effect of different growth regulators on propagation of Eranthemum (Eranthemum bicolor and Eranthemum tricolor) in subtropical zone of West Bengal under naturally ventilated polyhouse equipped with foggers at Instructional Farm, Jaguli, Bidhan Chandra Krishi Viswavidyalaya, West Bengal. Significant differences among the treatments (IAA @1000ppm, IAA@2000ppm, IAA @3000ppm, IBA @1000ppm, IBA @2000ppm, IBA @3000ppm, NAA @1000ppm, NAA @2000ppm, NAA @3000ppm, locally available rooting hormone and Control) on root emergence and proliferation were noticed. After two consecutive years of studied, Eranthemum bicolor can successfully propagated by tip cutting with the treatment of IAA @ 2000 ppm and IBA @ 3000ppm, whereas Eranthemum tricolor responded well in all growth regulators of higher concentration (3000ppm) for rapid multiplication of this plant in sub-tropical zone of West Bengal.

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