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Subashini JKWN1, Perera PIP1*, Jayawardana KVGLMC1, Nimantha SWSL1 and Herath HMSP2
1Department of Horticulture and Landscape Gardening, Faculty of Agriculture and Plantation Management, Wayamba University of Sri Lanka, Makandura, Gonawila (NWP), 60170, Sri Lanka
2Kamandaluwa Plantation, Sri Lanka Cashew Corporation, Kamandaluwa, Andigama, Sri Lanka
Abstract
Due to the existing variability among the populations and the inability of meeting the current demand for planting
materials for large-scale cultivation, cashew (Anacardium occidentale L.) requires a promising vegetative
propagation method. Stem cutting is the best propagule and needs to induce germination which is restricted in the
presence of gum. Wiping of gum secreted onto the cut surface of the stem with three solvents, water, acetone, and
kerosene just after and after 5, 10, and 15 min of making the cut was tested to remove the gum. The effect of the
presence of apical buds and leaves on the stem cuttings and the application of different types of rooting hormones
containing IBA onto the cut surface was tested using three commercial varieties, WUCC-13, WUCC-19, and
WUCC-21. Data were analyzed using CATMOD and ANOVA procedures. The results denoted a significant effect
of gum solvent for maintaining the cutting viability by giving rise to shoots and callus production (p<0.05).
Acetone was the only effective solvent in developing the callus on the cut surface. The application of Indole -3butyric
acid (IBA) indicated a better growth of shoots (p<0.001). Varieties, WUCC-13 and WUCC-21 disclosed
better shoot growth. The presence of the apical bud and leaves negatively affected on activation of the axillary
buds. Well-developed callus was present on the cut surface indicating the potential of giving rise to adventitious
roots.
Keywords: Cashew, Callus formation, Indole Butyric Acid (IBA), Acetone, Rooting hormone, Root induction,
Vegetative propagation
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* - Corresponding Author
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