Influence of plant growth regulators and colour of wrappers on air-layering in mango varieties.
Mahabir Singh, Baghel K. S.
Author Affiliation: Department of Horticulture, J. N. K. V. V. College of Agriculture, Rewa-486 001 (M. P.), India.
Research on Crops 2 : 37-40
Abstract : An experiment was conducted in Madhya Pradesh, India during the monsoon season [year not given] to determine the effect of plant growth regulators (IBA, NAA, IBA + NAA and control) and colour of wrappers (white and black polythene) on air layering in mango cultivars (Chowsa, Dusehri and Langra). Air layering was carried out on terminal shoots 60-75 cm in length and 2-2.5 cm thick which were 2-3 seasons old. Lanolin paste containing plant growth regulators at 15?000 ppm was applied evenly over the lower part of a cut ring. The treated cut was covered with sawdust and wrapped with white and black polythene film. Air layers were detached from the mother plant after 75 days, transplanted to a nursery and observations recorded on survival and root and growth characteristics. Dusehri recorded the highest success in air layering, survival percentage of air layers and number of leaves per new sprout. The number of new sprouts per plant was highest in Chowsa. Failure in air layering was recorded in the absence of plant growth regulators. IBA treatment was the most effective in promoting the success and survival of air layers, rooting and growth attributes. Among the wrappers, black polythene was the most appropriate for better success of air layering and survival of air layers.