Influence of coloured polyhouse/light and methods of epicotyl grafting on vigour of mango grafts.
Hema Nair, Baghel B. S., Tiwari R., Nema B. K.
Author Affiliation: Department of Fruit Science, Jawaharlal Nehru Krishi Vishwa Vidyalaya, Jabalpur 482 004 (M.P.), India.
JNKVV Research Journal 36 : 51-54
Abstract : Studies were conducted in Jabalpur, Madhya Pradesh, India, from July 1999 to December 1999 to investigate the effects of colour of polyhouse (open condition, white, red and blue) and method of epicotyl grafting (wedge, veneer, side and whip) on vigour of mango grafts. Observations on growth parameters (days taken to sprouting of 50% scions, leaf number, length and width, number of flushes per graft and number of leaves per flush) and vigour index of grafts were recorded 150 days after grafting. The earliest sprouting of 50% scions was observed with red polyhouse, which was significantly superior to open condition, but did not differ significantly from white and blue polyhouses. The maximum height of grafts and leaf number, length and width were also found under red polyhouse, which were significantly superior to the control (for height of grafts), control and white polyhouse (for length and width of leaves), and control and blue polyhouse (for number of leaves). The highest number of flushes per graft, number of leaves per flush and vigour index were recorded under red polyhouse, but it was at par to all the other polyhouses for these traits. The minimum values for all growth parameters were recorded in the control. The earliest sprouting of 50% scions was recorded when the grafts were raised by wedge method, which was found non-significant to all the other methods of grafting. The latest sprouting of 50% scions was found under the venner method. The maximum values for linear and radial growth parameters were recorded in the side method of grafting, which was found non-significant with other methods (for height of grafts, length and width of leaves and vigour index) and significantly superior to all the other methods (for number of leaves), wedge and whip methods (for number of leaves per flush), and whip method (for number of flushes per graft). The minimum values for all these parameters were found in the whip method. Although the different interactions of coloured polyhouse and method of grafting were non-significant for all the growth parameters, great differences between the interactions were found.