STUDIES ON EFFECT OF PLANT GROWTH REGULATORS ON ROOTING OF CARNATION (DIANTHUS CRYOPHYLLUS L.) CUTTINGS OF CV. DONA UNDER POLY HOUSE CONDITIONS

The present investigation is conducted to study the effect of plant growth regulators IBA and NAA at different concentrations and combinations on rooting of carnation (Dianthus caryophyllus L.) cuttings of cv. Dona under polyhouse conditions. The experiment was conducted in randomised block design during September 2011 to March 2012. Among the plant growth regulator treatments studied the treatment with IBA 200 ppm recorded less number of days for formation of root initials, highest percentage of rooting, maximum number of roots, cumulative length of roots per cutting and highest percentage of establishment of rooted cuttings followed by the treatment IBA 100 ppm + NAA 50 ppm. IBA treatments recorded superior rooting parameters over NAA treatments at that concentration and with increase in the concentration of IBA and NAA recorded increase in the rooting parameters.