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Effect of Scion Defoliation Period and Methods of Grafting on Success and Survivability in Mango

J Akter
Department of Horticulture, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh

MA Rahim
Department of Horticulture, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh

T Haque
Department of Horticulture, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh

MM Hossain
Department of Horticulture, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh

Abstract/ Executive Summary:

This study was conducted in order to investigate the effect of scion defoliation period and methods of grafting on the success and survivability of mango (var. Amrapali) at Bangladesh Agricultural University Germplasm Centre (BAU-GPC) of Fruit Tree Improvement Program (FTIP) of the Department of Horticulture, Bangladesh Agricultural University, Mymensingh. The experiment consisted of four scion defoliation periods, viz., defoliation before 9, 6, 3 days of grafting and defoliation on the day of grafting and two grafting methods namely cleft grafting and whip grafting. The study was laid out in randomized complete block design with three replications. The results revealed that scions defoliated 9 days before grafting showed the highest success (91.59%) and survivability (88.75%) and took the lowest time for bud breaking and first leaf opening (11.10 days and 14.22 days, respectively)whereas the lowest success rate (85.82% ) and survivability (83.60%) were observed when scion defoliation was performed on the day of grafting. In respect of grafting methods, higher graft success and survivability (89.68% and 86.89%, respectively) were found in cleft method, however, this method took longer time for bud breaking (11.92 days) and first leaf opening (15.90 days). The combined influence of scion defoliation period and grafting method exhibited the best performance on graft success and survivability when cleft grafting method was used with scion defoliated 9 days before grafting operation. Therefore the results of this investigation suggested that scions defoliated 9 days before grafting operation and cleft grafting method would be better for propagation of mango, yet the performance of cleft grafting with scion defoliated 6 days before grafting was also good with the hope of getting 85% success and survivability.

Keywords: Mango, Defoliation, Cleft grafting, Whip grafting, Success, Survivability, Scion

Location: Department of Horticulture, Bangladesh Agricultural University, Mymensingh

Start Date:

End Date:

Program Area: Variety and Species

Commodity: Mango

Objectives:

To find out the appropriate scion defoliation period and grafting methods of mango to get higher percentage of graft success and survivability.

Methodology:

The experiment on the effect of scion defoliation period and grafting methods on the success and survivability of mango (var. Amrapali) was conducted at the Bangladesh Agricultural University Germplasm Centre (BAU-GPC) of Fruit Tree Improvement Program (FTIP) of the Department of Horticulture, Bangladesh Agricultural University, Mymensingh. Scion shoots were collected from healthy and vigorous mother plants of year round Mango (var. Amrapali) grown in the Germplasm Centre of BAU. The rootstocks were raised in polybag from the seeds of unknown mango variety. The two factorial experiment consisting of four scion defoliation periods, viz., defoliation before 9 days of grafting, defoliation before 6 days of grafting, defoliation before 3 days of grafting, defoliation on the day of grafting and two grafting methods, viz., cleft grafting and whip grafting was laid out in randomized complete block design with three replications. Cleft grafting and whip grafting were performed following standard methods. The prepared grafts were shifted to the poly house and placed as per layout of the experiment and were maintained in good condition by removing off-shoots, polythene cap and polythene strip and controlling disease and pest. After 60 days the grafts were shifted to the normal open condition. The data were collected on the following parameters: Days required to bud breaking, days required to leaf opening, number of leaves per graft, graft height (cm), percentage of graft success and percentage of graft survivability. Days required for bud breaking and leaf opening were calculated from date of operation. Growths of the grafts (number of leaves per graft, graft height) were recorded at 30 days interval up to 90 days after grafting. The collected data on the different parameters of study were statistically analyzed and calculated using MSTAT-C computer package program. The significance of differences between treatments means were compared by Least Significant Difference (LSD) test (Gomez and Gomez, 1984).

Source of Information: Progressive Agriculture 27 (3): 242-248, 2016

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

From the results of this study it may be concluded that cleft grafting operation with the scion defoliated before 9 days of grafting would be the most suitable for the highest graft success, survivability and growth of mango grafts (var. Amrapali). It may also be noticed that grafting operation in mango can be performed with more than 85% success and survivability of grafts by the cleft and whip methods with the scion defoliated before 3 days of grafting operation.

Knowledge Management: Journal