Effect of Plant Growth Regulators and Growing Conditions on Rhizogenesis of Damask Rose (Rosa damascena Mill.) Cuttings

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Date
2015-07-07
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College of Horticulture and Forestry, Jhalawar
Abstract
An experiment was conducted during the winter season of 2013-14 to study “Effect of plant growth regulators and growing conditions on rhizogenesis of Damask rose (Rosa damascena Mill.) cuttings” at the College of Horticulture & Forestry, Jhalarapatan, Jhalawar. The experiment consisted of 26 treatment combinations of four levels (25, 50, 100 and 200 ppm) of each of NAA and IBA, alone and in combination along with two growing conditions (open field and 75% shade-net), laid out in completely randomized design with three replications. The treatment T26 (NAA 100 ppm + IBA 100 ppm + 75% shade net) recorded the least number of days to sprouting (12.5), maximum number of leaves per cutting (16.9), longest length of roots (7.93 cm), highest percentage of cuttings sprouted (97.0%) and the highest field survival of rooted cuttings (92.4%), whereas the treatment T22 (IBA 200 ppm + 75% shade-net) recorded the least number of days taken for root initiation (16.1), maximum number of primary roots per cutting (23.2), number of primary roots having secondary roots (14.1) and the highest percentage of cuttings rooted (96.0) along with the highest B:C (1.35:1) ratio. Whereas, the control (T1) recorded the most delayed sprouting (15.4 days), minimum number of leaves per cutting (9.16), shortest length of roots (4.53 cm), lowest percentage of cuttings sprouted (70.1%), field survival of rooted cuttings (79.5%), most delayed root initiation (21.4 days), minimum number of primary roots per cutting (14.9), number of primary roots having secondary roots (7.46) and the lowest percentage of cuttings rooted (70.0%) along with the lowest B:C (0.62:1) ratio.
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Effect of Plant Growth Regulators and Growing Conditions on Rhizogenesis of Damask Rose (Rosa damascena Mill.) Cuttings
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