Influence of type of cuttings and growth regulators on rooting in Indian Borage (Coleus aromaticus L.)

Abstract

The experiment was conducted at Horticulture College and Research Institute, Tamil Nadu Agricultural University, Coimbatore during 2016-2017 to assess the influence of the type of cuttings and growth regulators on Indian Borage (Coleus aromaticus L.). The experiment was laid out in a Factorial Completely Randomized Block Design (FCRD) with fifteen treatment combinations and replicated thrice. Higher rooting (94.86 %), survival percentage (94.87 %), days taken for shoot initiation (4.13 days) and days taken for root initiation (5.03) was recorded in softwood cuttings when compared to semi-hardwood and hardwood cuttings. Among the growth regulators, IBA @ 200 ppm enhanced rooting percentage(67.10 %) and survival percentage (69.01) besides improving the characters viz., days taken for root initiation (8.62 days), number of leaves sprouted (10.35), number of roots (30.90)and length of roots (15.49cm). Early sprouting (6.03 days) was observed in 1AA @ 200 ppm. The interaction effect of cuttings and growth regulators indicated that softwood cutting treated with IBA at 200 ppm was efficient to induce better sprouting and rooting than semi-hardwood and hardwood cuttings.