Sundharaiya, K., Swarnapriya, R., Jayajasmine, A., Sathish, G.(2016). Standardization Of Propagation Techniques In Vellerukku (Calotropis procera (Ait) Ait.F)

A field experiment was conducted at Agricultural College and research Institute, Tamil Nadu Agricultural University, Killikulam, Tamil Nadu to standardize the vegetative propagation technique in vellerukku. Three types of cuttings viz., terminal, middle and basal cuttings and three types of growth regulators viz., IBA, NAA @ 500 ppm and 1000ppm alone and in combination and control were used. The result revealed that the terminal cuttings treated with IBA 500 ppm registered the highest rooting percent (86.66 percent and 90.00 percent), number of roots (11.21 and 11.47), root length (23.75 cm and 24.98 cm), shoot length (29.40 cm and 30.64 cm) and survival percentage in the main field (68.13 percent and 71.20 percent) under both the environment viz. open and mist condition were recorded by the terminal cuttings treated with IBA 500 ppm. It was followed by terminal cuttings treated with IBA 1000 ppm. Whereas control (basal cuttings dipped in distilled water) recorded the lowest values of 18.20 and 23.28 percent of rooting, 7.03 and 7.08 number of roots, 16.14 cm and 17.12 cm root length, 19.54 cm and 20.03 cm shoot length 11.62 and 12.47 percent survival in the mainfield under both open as well as mist condition