Synergism between auxinic and non-auxinic chemicals in the regeneration of root from semi-hard wood cuttings of olive

Maximum rooting successes of 96.48 and 91.48 per cent respectively occurred in the cuttings taken in the month of June and August wit: PHS (1000 ppm) + NAA (5000 ppm) as against 45.46 and 40.75 per cent rooting success in untreated controls in the respective months. IBA (5000 ppm) caused highest root numbers of 31.33 and 34.59 in cuttings as against only 4.62 and 3.45 roots under untreated controls in the month of June and August respectively. FA (1000 ppm) + IBA (5000 ppm) recorded longest roots of 9.52 and 8.86 cm in the month of June and August, as against 3.04 and 2.83 cm long roots in untreated controls. IBA (5000 ppm) caused maximum survival percentage and cuttings taken in the month of June recorded greater rooting success. Among the different treatments, PHB (1000 ppm) + IBA (5000 ppm) was most effective followed by PHB (1000 ppm) + NAA (5000 ppm) and PHB (1000 ppm) + NAA (2500 ppm).