FACTORS AFFECTING THE SUCCESS POTENTIAL OF GRAFTING RELATED TO PERSIMMON CULTIVATION IN NEPAL

E.P. Simkhada, H. Gemma
Nepal has a long history of cultivation of astringent persimmon. Various varieties of Diospyros kaki (‘Haluwabed’ as called in Nepal) and indigenous strains are being cultivated for domestic consumption. All the varieties grown are astringent, late-ripening, low keeping quality, smaller size, seedy and with less edible flesh. In recent years, Nepal has focused on the growing of the pollination constant non-astringent (PCNA) type persimmon such as ‘Fuyu’ and ‘Jiro’ for early ripening, large fruit, less cracking, high edible quality and long keeping ability with high productivity. However, the low success of grafting has hindered the mass propagation of persimmons with more desirable traits. While grafting is usually performed using D. kaki (local persimmon) as both rootstock and scion, the average rate of success is less than 60%. Rainfall during the grafting season is low and the use of more ideal rootstock, D. kaki and D. lotus, has not become popular. To elucidate the causes of low success of grafting, a comparative study on the effect of cultivar and grafting method was made on various combinations of scions and rootstocks. Top-worked plant had higher percentage success than others. In situ grafting yielded better results than grafting done on transplanted rootstocks. Initial response to grafting was the development of callus cells along the cut surfaces of the rootstocks and scion. Necrosis of the xylem elements near the cut surfaces was observed, and after three to 12 months, new generating and connective tissues were seen in the transverse sections across necrotic callus cells at the base of the scion. After one to three years of grafting, the graft union zone of D. lotus showed more necrotic points than D. kaki which resulted in tree weakening in ‘Fuyu’ / D. lotus combination.
Simkhada, E.P. and Gemma, H. (2005). FACTORS AFFECTING THE SUCCESS POTENTIAL OF GRAFTING RELATED TO PERSIMMON CULTIVATION IN NEPAL. Acta Hortic. 685, 125-132
DOI: 10.17660/ActaHortic.2005.685.14
https://doi.org/10.17660/ActaHortic.2005.685.14
Diospyros kaki, Diospyros lotus, astringent, graft union, Japanese persimmon, Nepalese persimmon, top-working
English
685_14
125-132

Acta Horticulturae