EFFECT OF IBA CONCENTRATION ON INDUCING ROOTING IN STEM CUTTINGS OF Thuja compecta UNDER MIST HOUSE CONDITION

The experiment was carried out in randomized block design at Horticultural Research Centre, Chauras Campus, HNB Garhwal University Srinagar (Garhwal), Uttarakhand,India. Soft wood cuttings of T. compecta were collected from 3 to 4 year old plants and 15 cm long cuttings with apical portion. The cuttings were treated with 1, 2, 3, 4 and 5g L-1 IBA solutions by quick dip method. Vermicompost was used as the rooting media. The temperature of the vermicompost was 26 ??2°C. Experiment was conducted in the mist house. Among all the treatments, highest number of root per cutting (19.67) was recorded under 5g L-1 IBA concentration. The maximum length of roots per cutting (9.33 cm) was recorded under 2g L-1 IBA concentration. The maximum diameter of root per cutting (0.20 cm) was observed in 4g L-1 and 5g L-1 IBA concentration. Maximum (82.70%) roots per rooted cutting was observed in 5g L-1 IBA concentration. The minimum (23.67 days) taken to callus formation was noticed in 4g L-1 IBA concentration.