EFFECT OF TIME AND PROPAGATION STRUCTURE ON SUCCESS OF VENEER GRAFTING IN MANGO (Mangifera indica L.) cv. BANGANPALLI UNDER SOUTHERN ZONE OF ANDHRA PRADESH
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Date
2013-09
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Dr. Y.S.R. HORTICULTURAL UNIVERSITY
Abstract
An experiment was conducted to study the effect of time of grafting and propagation structures on success of veneer grafting in mango (Mangifera indica L.) cv. Banganpalli under southern zone of Andhra Pradesh during the period from July, 2012 - April, 2013. Time of grafting was taken on 15th of every month from July to January. Whereas the effect of propagation structures viz., open condition, 50% shade net, 75% shade net, naturally ventilated polyhouse and partial shade under coconut trees on success of veneer grafting was studied at Horticultural College and Research Institute, Dr. Y.S.R. Horticultural University, Anantharajupet, Y.S.R. district of Andhra Pradesh.
A comprehensive study of results revealed that grafts prepared on 15th July were found to take minimum time (11.09 days) for sprouting and recorded maximum percentage (81.11%) of sprouted grafts, higher number of leaves (19.55), maximum leaf area (398.26 cm2) and also in respect of sprout growth (6.34 cm), height of graft (18.67 cm), number of nodes on scion (22.08) and number of growth flushes (1.96) per graft closely followed by the grafts prepared on 15th August and 15th January. However, minimum graft diameter (1.02 cm) was recorded by the grafting on 15th August.
Among propagation structures the highest graft survival (67.18%) was recorded under naturally ventilated polyhouse which supported greater vigour of scion sprouts as evident from the data obtained on number of growth flushes (1.77) followed by open condition (1.75) and shade net 50% (1.74). Naturally ventilated polyhouse recorded maximum number of nodes (22.61) which was significantly superior over all other shade conditions. It has double advantage of earliest sprouting of more number of grafts and survival till the end of study period.
Among the interactions, grafts prepared in the month of July under naturally ventilated polyhouse were found to record the highest survival percentage (88.25 %) followed by those under shade net 50% (85.44 %). The next superior values were found to be recorded by the grafts prepared during August under naturally ventilated polyhouse with survival percentage (85.55 %) followed by the grafts preparing during January under the same conditions (80.90 %).
It can be concluded from the present study that the warm conditions and growing temperatures in the months July under naturally ventilated polyhouse and shade net 50% followed by the grafts prepared during August and January under naturally ventilated polyhouse conditions found to favour survival percentage of veneer grafts in mango cv. Banganpalli under Anantharajupeta conditions.
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Keywords
grafting ,propagation,veneer grafting ,ventilated polyhouse