Abstract

The present investigation was conducted at Commercial Fruit Nursery, College of Horticulture, Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola during three years (201013). The study was undertaken with objectives to study the effect of different IBA levels on rooting and survival of karonda air layering and to find out the suitable IBA level for rooting and survival of karonda air layers. The experiment was laid out in randomized block design. The treatments consisted of six different levels of IBA (1000, 2000, 3000, 4000, 5000 and 6000 ppm) and one control, replicated thrice. The results of three years pooled data revealed that different levels of IBA had significant effect on root and shoot characters of karonda air layers. IBA 5000 ppm was effective with respect to minimum days for rooting (10.73 days), increased number of roots per layer (102.55), height of rooted layers (44.53 cm) and number of leaves (145.77). In addition, root to shoot ratio (1.17) and highest survival percentage (90.82%) were recorded in 5000 ppm IBA treatment. However, least values for these characters were associated with control treatment. IBA 6000 ppm was also found effective with respect to days required for rooting, rooting percentage and survival percentage next to IBA 5000 ppm treatment. Thus, it is worthwhile to use 5000 ppm IBA for commercial multiplication of karonda through air layering.